SB 670BA ---32---040 Page 1 of 2 Nov 13/2014 

## SERVICE BULLETIN REVISION TRANSMITTAL SHEET
SERVICE BULLETIN 670BA ---32 ---040

SUBJECT: Landing Gear --- Main Landing Gear (MLG) and Doors --- Increase the Clearances Between the MLG Fairing and MLG Doors This page transmits: Revision E of Service Bulletin 670BA --- 32 --- 040, dated Nov 13/2014 and Revision A of Appendix A, dated Jul 02/2014 and Revison B of Appendix B, dated Jul 02/2014. The changes in this revision have no effect on aircraft that have had this service bulletin incorporated.

Reason: Revised Planning Information, paragraph 1., to: Add some references in PART C and PART D. Revised Accomplishment Instructions, paragraph 2., to: Add some steps in Part C and Part D. Change an illustration. Revised Material Information, paragraph 3., to: Add two notes. This revision includes small editorial changes that do not have an effect on the technical content.
Instructions: Discard the copy of Service Bulletin 670BA --- 32 --- 040, Revision D, dated Jul 02 /2014. Replace with the copy attached.SB 670BA ---32---040 Page 2 of 2 Nov 13/2014 Service Bulletin History: Initial issue, dated Oct 12/2012. Revision A, dated Mar 13/2013. Revision B, dated Aug 6/2013. Revision C, dated Nov 01/2013. Revision D, dated Jul 02/2014. 1 ASB 670BA---32---040 Page 1 of 189 Oct 12/2012 Revision E, 13 Nov/2014 

# SERVICE BULLETIN

Technical Publications

THIS SERVICE BULLETIN IS SENT TO EACH OPERATOR. IF THE OPERATOR HAS LEASED AIRCRAFT, TRANSFERRED SPARES IN THE LAST SIX MONTHS, SEND THIS SERVICE BULLETIN TO THE NEW OWNER, UNLESS CONFIRMATION WAS RECEIVED THAT BOMBARDIER COMMERCIAL AIRCRAFT HAS INCLUDED THE NEW OPERATOR ON THE DISTRIBUTION LIST. SEND THIS SERVICE BULLETIN TO THE LESSEE. IF THE OPERATOR HAS SOLD AIRCRAFT OR

ATA SYSTEM: 32-10 NUMBER: 670BA-32-040 SUBJECT: Landing Gear --- Main Landing Gear (MLG) and Doors --- Increase the

Clearances Between the MLG Fairing and the MLG Doors
1. PLANNING INFORMATION A. Effectivity (1) AircraftAffected:

AIRCRAFT MODEL SERVICE AIRCRAFT SERIAL NUMBERS PRODUCTION AIRCRAFT SERIAL NUMBERS CL-600-2C10 10002 Thru 10333 10334 and subsequent serial numbers [1] CL-600-2D15 and CL-600-2D24 15001 Thru 15284 15285 and subsequent serial numbers [1] [1] Aircraft will have this change incorporated before delivery.

NOTE:The instructions in this service bulletin are only applicable to the systems and parts installed at the time of delivery of the aircraft or as changed by Bombardier Service Bulletins. Before you do this service bulletin, examine all Supplemental Type Certificates (STCs), Supplemental Type Approvals (STAs), or equivalent action changes to make sure you can complete this service bulletin. NOTE:The procedure in this service bulletin was validated on aircraft serial number 15272.

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 2 of 189 Oct 12/2012 Revision E, 13 Nov/2014 B. Reason (1) Condition During the retraction phase of the landing gears, the left and/or the right (MLG) inboard door can travel past the internal metallic stiffener in the forward rubber seal of the MLG fairing. If this occurs, it is possible for the MLG inboard doors to get caught in the MLG fairing and prevent the full extension of the MLG. (2) Evidence Two landings with one main landing gear-up occurred in service. (3) Objective/Benefit This service bulletin gives the procedure to make changes to the MLG inboard doors, the MLG fairing and the adjacent structure of the MLG doors. This service bulletin also gives the procedure to do the adjustment of the MLG doors. The incorporation of this service bulletin will increase the clearances between the fairing and the doors of the MLG. This will prevent the MLG doors from getting caught in the MLG fairing during the extension of the landing gears. C. Description This service bulletin is divided into four parts: PART A, PART B, PART C, and PART D. PART A --- Increase of the Clearance Between the Left MLG Inboard-Door and the MLG Fairing Circuit breakers are opened. The aircraft is put on jacks. The MLG door hinge-fairing is removed. A detailed visual inspection of the MLG inboard doors, the MLG fairing and the MLG inboard-door adjacent structure is done. The diameter of two holes in the aft member, that hold the roller, are increased. The bushing and the roller are installed. The clearance between the inboard MLG door and the aft attachment of the outboard MLG door is corrected. A clearance check of the MLG door is done. The aft stop-fitting, the seal and the seal retainer are removed. The aft stop-fitting is cut and the stop pad is relocated. The aft stop-fitting is installed. The aft seal of the MLG door is replaced. The clearance between the MLG fairing and the MLG inboard and outboard doors is done. The forward seal is replaced. The seal retainer is cut and installed. The safety guide is installed with the forward seal and the seal retainer. The nameplate of the MLG door is installed. The lockpins are removed from the MLG. The circuit breakers are closed. The clearance check of the MLG inboard doors is done. The MLG door hinge-fairing is installed. The lockpins are installed in the MLG. The aircraft is lowered.

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 3 of 189 Oct 12/2012 Revision E, 13 Nov/2014

PART B --- Increase of the Clearance Between the Right MLG Inboard-Door and the MLG Fairing Circuit breakers are opened. The aircraft is put on jacks. The MLG door hinge-fairing is removed. A detailed visual inspection of the MLG inboard doors, the MLG fairing and the MLG inboard-door adjacent structure is done. Two holes in the aft member, that hold the roller, are increased. The bushing and the roller are installed. The clearance between the inboard MLG door and the aft attachment of the outboard MLG door is corrected. A clearance check of the MLG door is done. The aft stop-fitting, the seal and the seal retainer are removed. The aft stop-fitting is cut and the stop pad is relocated. The aft stop-fitting is installed. The aft seal of the MLG door is replaced. The clearance between the MLG fairing and the MLG inboard and outboard doors is done. The forward seal is replaced. The seal retainer is cut and installed. The safety guide is installed with the forward seal and the seal retainer. The nameplate of the MLG door is installed. The lockpins are removed from the MLG. The circuit breakers are closed. The clearance check of the MLG inboard doors is done. The MLG door hinge-fairing is installed. The lockpins are installed in the MLG. The aircraft is lowered. For Aircraft that Install Inboard MLG Door Part Number CC670-10520-15 and/or CC670-10520-16 PART C --- Installation of the Inboard MLG Door Part Number CC670-10520-15 and Increase of the Clearance Between the Left MLG Inboard-Door and the MLG Fairing For all aircraft Circuit breakers are opened. The aircraft is put on jacks. A detailed visual inspection of the MLG fairing is done. If installed the left inboard MLG door is removed. For Aircraft 10002 thru 10217, 15002 thru 15043 and 15991 In Service (IS) Modification Summary IS670528200033 is done For all aircraft The left inboard MLG door is installed. The clearance between the inboard MLG door and the aft attachment of the outboard MLG door is adjusted. A clearance check of the inboard MLG door and the outboard MLG door is done.The aft stop-fitting, the seal, and the seal retainer are removed. The aft stop-fitting is cut and the stop pad is relocated. The aft stop-fitting is installed. The material between the MLG fairing and the inboard MLG door and outboard MLG door is removed. The forward seal is replaced. The seal retainer is cut and installed. The safety guide is installed with the forward seal and the seal retainer.The lockpins are removed from the MLG. The circuit breakers are closed. The clearance check of the inboard MLG door and outboard MLG door is done. The MLG door hinge-fairing is installed. The lockpins are installed in the MLG. The aircraft is lowered.

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 4 of 189 Oct 12/2012 Revision E, 13 Nov/2014

PART D --- Installation of the Inboard MLG Door Part Number CC670-10520-16 and Increase of the Clearance Between the Right MLG Inboard-Door and the MLG Fairing For all aircraft Circuit breakers are opened. The aircraft is put on jacks. A detailed visual inspection of the MLG fairing is done. If installed the right inboard MLG door is removed. For Aircraft 10002 thru 10217, 15002 thru 15043 and 15991 In Service (IS) Modification Summary IS670528200033 is done For all aircraft The right inboard MLG door is installed. The clearance between the inboard MLG door and the aft attachment of the outboard MLG door is adjusted. A clearance check of the inboard MLG door and the outboard MLG door is done.The aft stop-fitting, the seal, and the seal retainer are removed. The aft stop-fitting is cut and the stop pad is relocated. The aft stop-fitting is installed. The material between the MLG fairing and the inboard MLG door and outboard MLG door is removed. The forward seal is replaced. The seal retainer is cut and installed. The safety guide is installed with the forward seal and the seal retainer. The lockpins are removed from the MLG. The circuit breakers are closed. The clearance check of the inboard MLG door and outboard MLG door is done. The MLG door hinge-fairing is installed. The lockpins are installed in the MLG. The aircraft is lowered. For all aircraft D. Compliance Recommended Service Bulletin. Bombardier recommends that this service bulletin be done at no more than 6600 flight hours or three years, from the release date of Revision A of this service bulletin, whichever comes first, unless otherwise directed by the airworthiness authority of the operator. For aircraft that have the MLG doors removed at 6600 flight hours or three years, after the release date of Revision A of this service bulletin At the installation of the left MLG and/or the right MLG door(s), it is necessary to do this service bulletin before next flight, unless otherwise directed by the airworthiness authority of the operator.

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 5 of 189 Oct 12/2012 Revision E, 13 Nov/2014 For Aircraft 10002 thru 10230 and Aircraft 15002 thru 15053,15055, and 15056 NOTE: Service Bulletin 670BA-32-017, Landing Gear - Main Landing Gear Door and Mechanism System - Replacement of the Cross Member and aft Member of the Inboard Main Landing Gear (MLG) Doors CC670-10520-2003, -2004, -2005, -2006, -2007,-2008, -2009, -2010, -965, -966, -11, -12, MLG doors repaired with the REO 670-52-82-014, and CC670-10520-3, -4, -9, -10, -951, -952, -963 and -964 MLG doors repaired with the REO 670-52-82-016, is a prerequisite to this service bulletin. For all aircraft NOTE: It is not necessary to do service bulletin 670BA-32-030 when this Service Bulletin, Landing Gear - Main Landing Gear (MLG) and Doors - Inspection of the MLG Inboard Doors and MLG Fairing, is done. NOTE: If it is not possible to complete all the instructions in this service bulletin because of the configuration of the aircraft, speak with a representative of Bombardier Customer Response Centre at phone number 514---855---8500 or send an e-mail at thd.crj@bombardier.com for analysis and to get an approved disposition to complete this service bulletin. This service bulletin does not affect Airworthiness Limitations (AWLs) or Damage Tolerance Inspections (DTIs). E. Approval The technical content of this service bulletin has been approved under the authority of the TCCA Design Approval Organization No: DAO #93-Q-02. F. Manpower The man-hours given below are estimates for direct labor done by an experienced crew on an aircraft prepared for maintenance. These estimates do not include the time necessary for: ---Administrative functions such as planning, liaising, familiarization, and report writing. ---Non-productive elapsed time such as rest time, having meals, and crew shift changes. ---Elapsed time such as for paint to dry, sealant to cure, and fuel tank venting. ---Preparation for modification (unless specified in the Accomplishment Instructions) such as cleaning and getting parts, tools, consumables, and ground equipment.

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 6 of 189 Oct 12/2012 Revision E, 13 Nov/2014

---Quality assurance inspections, troubleshooting and/or correction of discrepancies found when a task is done. ---All other activities that are not considered by Bombardier as directly related to the accomplishment of this procedure. NOTE:For on-site labor assistance, please speak with a Fleet Services representative for a quote. Contact the Fleet Services Team through the CRC at 514-855-8500 or email at thd.crj@aero.bombardier.com. For PART A It will take an estimated 24.0 man-hours to complete PART A of this service bulletin. The man-hours are divided in the table that follows (elapsed cure time is not included in the man-hour summary given above):

TASK MAN-HOURS (1) Job Set-Up 3.0 (2) Procedure 12.0 (3) Test 6.0 (4) Job Close-Out 3.0

For PART B It will take an estimated 24.0 man-hours to complete PART B of this service bulletin. The man-hours are divided in the table that follows (elapsed cure time is not included in the man-hour summary given above):

TASK MAN-HOURS (1) Job Set-Up 3.0 (2) Procedure 12.0 (3) Test 6.0 (4) Job Close-Out 3.0

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 7 of 189 Oct 12/2012 Revision E, 13 Nov/2014

For PART C It will take an estimated 20.0 man-hours to complete PART C of this service bulletin. The man-hours are divided in the table that follows (elapsed cure time is not included in the man-hour summary given above):

TASK MAN-HOURS (1) Job Set-Up 3.0 (2) Procedure 8.0 (3) Test 6.0 (4) Job Close-Out 3.0

NOTE:The man-hours for the procedure do not include the hours to do IS Modification Summary IS670528200033 For PART D It will take an estimated 20.0 man-hours to complete PART D of this service bulletin. The man-hours are divided in the table that follows (elapsed cure time is not included in the man-hour summary given above):

TASK MAN-HOURS (1) Job Set-Up 3.0 (2) Procedure 8.0 (3) Test 6.0 (4) Job Close-Out 3.0

NOTE:The man-hours for the procedure do not include the hours to do IS Modification Summary IS670528200033

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 8 of 189 Oct 12/2012 Revision E, 13 Nov/2014 G. Material --- Price and Availability (1) The kits in the tables that follow are available from Bombardier Commercial Aircraft. Refer to the paragraphs below for the terms and conditions. NOTE:For a list of kit contents, refer to paragraph 3.A. For PART A

KIT NUMBER NAME 670BA32040K1A Fairing and Left MLG door -

Parts

KIT NUMBER NAME 670BA32040K3A Fairing and Left MLG door -

Hardware

KIT NUMBER NAME 670BA32040K5 Left Fairing Forward Seal
For PART B

KIT NUMBER NAME 670BA32040K2A Fairing and Right MLG door -

Parts

KIT NUMBER NAME 670BA32040K4A Fairing and Right MLG door -

Hardware

KIT NUMBER NAME 670BA32040K6 Right Fairing Forward Seal

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 9 of 189 Oct 12/2012 Revision E, 13 Nov/2014

For PART A and/or PART B

KIT NUMBER NAME 670BA32040K9 Oversize and Next Size

Fasteners

For PART C

KIT NUMBER NAME 670BA32040K5 Left MLG Fairing Forward Seal

KIT NUMBER NAME 670BA32040K7 Left MLG Fairing, Seal and

Hardware

For PART D

KIT NUMBER NAME 670BA32040K6 Right MLG Fairing Forward Seal

KIT NUMBER NAME 670BA32040K8 Right MLG Fairing, Seal and

Hardware
(2) One kit 670BA32040K9 is necessary for each operator that are incorporating Part A and Part B of this service bulletin. To replace parts from Kit 670BA32040K9, speak with a representative of the Service Bulletin Kit Support Team at the address below.

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 10 of 189 Oct 12/2012 Revision E, 13 Nov/2014

(3) Please send a purchase order to the address below to schedule kit delivery: Bombardier Service Bulletin Kit Support Team 123 Garratt Blvd, N42-24 Toronto, Ontario Canada M3K 1Y5 Fax: 416-375-3060 Phone: 416-375-3920 Email: sbkits@aero.bombardier.com Please contact the Service Bulletin Kit Support Team at the address above for terms and conditions. (4) Refer to paragraph 3.B. for a list of consumables for this service bulletin. H. Tooling --- Price and Availability (1) The tool kit in the table that follows is available from Bombardier. NOTE:For a list of the kit contents, refer to paragraph 3.A. For PART A and PART B

KIT NUMBER NAME 670BA32040K90 DRILL JIG MLG DOOR ROLLER
For PART C and PART D None. (2) Please send a purchase order to the address below to schedule kit delivery: Bombardier Service Bulletin Kit Support Team 123 Garratt Blvd, N42-24 Toronto, Ontario Canada M3K 1Y5 Fax: 416-375-3060 Phone: 416-375-3920 Email: sbkits@aero.bombardier.com Please contact the Service Bulletin Kit Support Team at the address above for terms and conditions. (3) Refer to paragraph 3.C. for a list of special tools and equipment for this service bulletin. Refer to the paragraphs below for terms and conditions.

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 11 of 189 Oct 12/2012 Revision E, 13 Nov/2014 I. Weight and Balance For CL-600-2C10 aircraft For aircraft that had PART A of this service bulletin incorporated

WEIGHT ARM MOMENT¡ + 0.2 lb + 823.5 in. + 0.165 (1000 lb-in.) + 0.09 kg + 20.92 m + 0.0019 (1000 kg-m) ¡ The value in the Moment column is divided by 1000. Refer to Weight and Balance Manual CSP A-041. For aircraft that had PART B of this service bulletin incorporated

WEIGHT ARM MOMENT¡ + 0.2 lb + 823.5 in. + 0.165 (1000 lb-in.) + 0.09 kg + 20.92 m + 0.0019 (1000 kg-m) ¡ The value in the Moment column is divided by 1000. Refer to Weight and Balance Manual CSP A-041. For aircraft that had PART C of this service bulletin incorporated

WEIGHT ARM MOMENT¡ + 0.2 lb + 823.5 in. + 0.165 (1000 lb-in.) + 0.09 kg + 20.92 m + 0.0019 (1000 kg-m) ¡ The value in the Moment column is divided by 1000. Refer to Weight and Balance Manual CSP A-041. For aircraft that had PART D of this service bulletin incorporated

WEIGHT ARM MOMENT¡ + 0.2 lb + 823.5 in. + 0.165 (1000 lb-in.) + 0.09 kg + 20.92 m + 0.0019 (1000 kg-m) ¡ The value in the Moment column is divided by 1000. Refer to Weight and Balance Manual CSP A-041.

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 12 of 189 Oct 12/2012 Revision E, 13 Nov/2014 For CL-600-2D15 and CL-600-2D24 aircraft For aircraft that had PART A of this service bulletin incorporated

WEIGHT ARM MOMENT¡ + 0.2 lb + 913.5 in. + 0.183 (1000 lb-in.) + 0.09 kg + 23.20 m + 0.0021 (1000 kg-m) ¡ The value in the Moment column is divided by 1000. Refer to Weight and Balance Manual CSP A-041. For aircraft that had PART B of this service bulletin incorporated

WEIGHT ARM MOMENT¡ + 0.2 lb + 913.5 in. + 0.183 (1000 lb-in.) + 0.09 kg + 23.20 m + 0.0021 (1000 kg-m) ¡ The value in the Moment column is divided by 1000. Refer to Weight and Balance Manual CSP A-041. For aircraft that had PART C of this service bulletin incorporated

WEIGHT ARM MOMENT¡ + 0.2 lb + 913.5 in. + 0.183 (1000 lb-in.) + 0.09 kg + 23.20 m + 0.0021 (1000 kg-m) ¡ The value in the Moment column is divided by 1000. Refer to Weight and Balance Manual CSP A-041. For aircraft that had PART D of this service bulletin incorporated

WEIGHT ARM MOMENT¡ + 0.2 lb + 913.5 in. + 0.183 (1000 lb-in.) + 0.09 kg + 23.20 m + 0.0021 (1000 kg-m) ¡ The value in the Moment column is divided by 1000. Refer to Weight and Balance Manual CSP A-041.

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 13 of 189 Oct 12/2012 Revision E, 13 Nov/2014 For all aircraft J. Electrical Load Data Not changed. K. References Modification Summary 670T001677, Revision K Modification Summary 670T014111, Revision A-1 Restriction and/or Special Instruction (RSI) C-32-1330-00, Revision H In Service Modification Summary IS670528200033 Aircraft Flight Manual (AFM) Aircraft Maintenance Manual (AMM) Structural Repair Manual (SRM) Non-destructive Testing Manual (NDTM) For Bombardier reference only: PCA 74689. Refer to the SB Introduction document for definition or explanation of Service Bulletin content.
L. Other Publications Affected Aircraft Maintenance Manual (AMM) Aircraft Illustrated Parts Catalogue (AIPC) Weight and Balance Manual (WBM)

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 14 of 189 Oct 12/2012 Revision E, 13 Nov/2014 M. Relationship Chart

PRE-SB PART NUMBER NAME POST-SB PART NUMBER NAME

CC670-10520-967 Inboard MLG

Door Assembly KBA670-10500-23 [1] or CC670-10520-15 [4] Inboard MLG Door Assembly

CC670-10520-968 Inboard MLG

Door Assembly KBA670-10500-24 [2] or CC670-10520-16 [5] Inboard MLG Door Assembly

CC670-10520-2011 Inboard MLG Door Assembly KBA670-10500-25 [1] or CC670-10520-15 [4] Inboard MLG Door Assembly

CC670-10520-2012 Inboard MLG Door Assembly KBA670-10500-26 [2] or CC670-10520-16 [5] Inboard MLG Door Assembly

CC670-10520-2013 Inboard MLG Door Assembly KBA670-10500-27 [1] or CC670-10520-15 [4] Inboard MLG Door Assembly

CC670-10520-2014 Inboard MLG Door Assembly KBA670-10500-28 [2] or CC670-10520-16 [5] Inboard MLG Door Assembly

CC670-10520-2015 Inboard MLG Door Assembly KBA670-10500-29 [1] or CC670-10520-15 [4] Inboard MLG Door Assembly

CC670-10520-2016 Inboard MLG Door Assembly KBA670-10500-30 [2] or CC670-10520-16 [5] Inboard MLG Door Assembly

CC670-10520-13 Inboard MLG

Door Assembly KBA670-10500-31 [1] or CC670-10520-15 [4] Inboard MLG Door Assembly

CC670-10520-14 Inboard MLG

Door Assembly KBA670-10500-32 [2] or CC670-10520-16 [5] Inboard MLG Door Assembly

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 15 of 189 Oct 12/2012 Revision E, 13 Nov/2014

PRE-SB PART NUMBER NAME POST-SB PART NUMBER NAME

KCC670-10900-1 Inboard MLG

Door Assembly KBA670-10500-33 [1] or CC670-10520-15 [4] Inboard MLG Door Assembly

KCC670-10900-2 Inboard MLG

Door Assembly KBA670-10500-34 [2] or CC670-10520-16 [5] Inboard MLG Door Assembly

KCC670-10900-3 Inboard MLG

Door Assembly KBA670-10500-35 [1] or CC670-10520-15 [4] Inboard MLG Door Assembly

KCC670-10900-4 Inboard MLG

Door Assembly KBA670-10500-36 [2] or CC670-10520-16 [5] Inboard MLG Door Assembly

KCC670-10900-5 Inboard MLG

Door Assembly KBA670-10500-37 [1] or CC670-10520-15 [4] Inboard MLG Door Assembly

KCC670-10900-6 Inboard MLG

Door Assembly KBA670-10500-38 [2] or CC670-10520-16 [5] Inboard MLG Door Assembly

KCC670-10901-1 Inboard MLG

Door Assembly KBA670-10500-51 [1] or CC670-10520-15 [4] Inboard MLG Door Assembly

KCC670-10901-2 Inboard MLG

Door Assembly KBA670-10500-52 [2] or CC670-10520-16 [5] Inboard MLG Door Assembly

KCC670-10901-3 Inboard MLG

Door Assembly KBA670-10500-53 [1] or CC670-10520-15 [4] Inboard MLG Door Assembly

KCC670-10901-4 Inboard MLG

Door Assembly KBA670-10500-54 [2] or CC670-10520-16 [5] Inboard MLG Door Assembly
CC670-10571-13 Aft Member KBA670-10500-45 [1] Aft Member CC670-10571-14 Aft Member KBA670-10500-46 [2] Aft Member

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 16 of 189 Oct 12/2012 Revision E, 13 Nov/2014

PRE-SB PART NUMBER NAME POST-SB PART NUMBER NAME

CC670-10570-1 Forward Member MLG Door KBA670-10500-47 [1] Forward Member MLG Door

CC670-10570-2 Forward

Member MLG Door KBA670-10500-48 [2] Forward Member MLG Door
CC670-10570-5 Forward

Member MLG Door KBA670-10500-49 [1] Forward Member MLG Door
CC670-10570-6 Forward

Member MLG Door KBA670-10500-50 [2] Forward Member MLG Door
BA670-00001-2085 MLG Fairing Assembly KBA670-10500-300

[1] or [4] MLG Fairing

Assembly BA670-00001-2085 MLG Fairing Assembly KBA670-10500-350

[2] or [5] MLG Fairing

Assembly

BA670-00001-2085 MLG Fairing Assembly KBA670-10500-3

[3] or [6] [1] and [5] [2] and [4] MLG Fairing Assembly

CC670-39005-951 MLG Fairing Assembly KBA670-10500-500

[1] or [4] MLG Fairing

Assembly CC670-39005-951 MLG Fairing Assembly KBA670-10500-550

[2] or [5] MLG Fairing

Assembly

CC670-39005-951 MLG Fairing Assembly KBA670-10500-5

[3] or [6] [1] and [5] [2] and [4] MLG Fairing Assembly

CC670-39005-3 MLG Fairing Assembly KBA670-10500-700

[1] or [4] MLG Fairing

Assembly

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 17 of 189 Oct 12/2012 Revision E, 13 Nov/2014

PRE-SB PART NUMBER NAME POST-SB PART NUMBER NAME
CC670-39005-3 MLG Fairing Assembly KBA670-10500-750

[2] or [5] MLG Fairing

Assembly

CC670-39005-3 MLG Fairing Assembly KBA670-10500-7

[3] or [6] [1] and [5] [2] and [4] MLG Fairing Assembly

CC670-39005-5 MLG Fairing Assembly KBA670-10500-130

[1] or [4] MLG Fairing

Assembly CC670-39005-5 MLG Fairing Assembly KBA670-10500-135

[2] or [5] MLG Fairing

Assembly [2] or [5]

CC670-39005-5 MLG Fairing Assembly KBA670-10500-13

[3] or [6] [1] and [5] [2] and [4] MLG Fairing Assembly

CC670-39019-49 MLG Fairing Assembly KBA670-10500-190

[1] or [4] MLG Fairing

Assembly CC670-39019-49 MLG Fairing Assembly KBA670-10500-195

[2] or [5] MLG Fairing

Assembly

CC670-39019-49 MLG Fairing Assembly KBA670-10500-19

[3] or [6] [1] and [5] [2] and [4] MLG Fairing Assembly

CC670-39019-963 MLG Fairing Assembly KBA670-10500-150

[1] or [4] MLG Fairing

Assembly CC670-39019-963 MLG Fairing Assembly KBA670-10500-155

[2] or [5] MLG Fairing

Assembly

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 18 of 189 Oct 12/2012 Revision E, 13 Nov/2014

PRE-SB PART NUMBER NAME POST-SB PART NUMBER NAME

CC670-39019-963 MLG Fairing Assembly KBA670-10500-15

[3] or [6] [1] and [5] [2] and [4] MLG Fairing Assembly

CC670-39019-965 MLG Fairing Assembly KBA670-10500-170

[1] or [4] MLG Fairing

Assembly CC670-39019-965 MLG Fairing Assembly KBA670-10500-175

[2] or [5] MLG Fairing

Assembly

CC670-39019-965 MLG Fairing Assembly KBA670-10500-17

[3] or [6] [1] and [5] [2] and [4] MLG Fairing Assembly

CC670-39019-51 MLG Fairing Assembly KBA670-10500-210

[1] or [4] MLG Fairing

Assembly CC670-39019-51 MLG Fairing Assembly KBA670-10500-215

[2] or [5] MLG Fairing

Assembly

CC670-39019-51 MLG Fairing Assembly KBA670-10500-21

[3] or [6] [1] and [5] [2] and [4] MLG Fairing Assembly

KBA670-39005-3 MLG Fairing Assembly KBA670-10500-610

[1] or [4] MLG Fairing

Assembly KBA670-39005-3 MLG Fairing Assembly KBA670-10500-615

[2] or [5] MLG Fairing

Assembly

KBA670-39005-3 MLG Fairing Assembly KBA670-10500-61

[3] or [6] [1] and [5] [2] and [4] MLG Fairing Assembly

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SB 670BA---32---040 Page 19 of 189 Oct 12/2012 Revision E, 13 Nov/2014

PRE-SB PART NUMBER NAME POST-SB PART NUMBER NAME
KBA670-39005-5 MLG Fairing Assembly KBA670-10500-630

[1] or [4] MLG Fairing

Assembly KBA670-39005-5 MLG Fairing Assembly KBA670-10500-635

[2] or [5] MLG Fairing

Assembly

KBA670-39005-5 MLG Fairing Assembly KBA670-10500-63

[3] or [6] [1] and [5] [2] and [4] MLG Fairing Assembly

KBA670-39005-7 MLG Fairing Assembly KBA670-10500-650

[1] or [4] MLG Fairing

Assembly KBA670-39005-7 MLG Fairing Assembly KBA670-10500-655

[2] or [5] MLG Fairing

Assembly

KBA670-39005-7 MLG Fairing Assembly KBA670-10500-65

[3] or [6] [1] and [5] [2] and [4] MLG Fairing Assembly

KBA670-39005-9 MLG Fairing Assembly KBA670-10500-670

[1] or [4] MLG Fairing

Assembly KBA670-39005-9 MLG Fairing Assembly KBA670-10500-675

[2] or [5] MLG Fairing

Assembly

KBA670-39005-9 MLG Fairing Assembly KBA670-10500-67

[3] or [6] [1] and [5] [2] and [4] MLG Fairing Assembly

CC670-39076-1 Fitting aft Stop KBA670-10500-39 [1] or [4] Fitting aft Stop
CC670-39076-2 Fitting aft Stop KBA670-10500-40 [2] or [5] Fitting aft Stop

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SB 670BA---32---040 Page 20 of 189 Oct 12/2012 Revision E, 13 Nov/2014

PRE-SB PART NUMBER NAME POST-SB PART NUMBER NAME

CC670-39244-1 Fairing FWD Seal LH CC670-39244-5

[1] or [4] Fairing FWD Seal LH
CC670-39244-2 Fairing FWD Seal RH CC670-39244-6

[2] or [5] Fairing FWD Seal RH CC670-39245-1 Seal Retainer Forward KBA670-10500-41/-43

[1] or [4] Seal Retainer Forward CC670-39245-2 Seal Retainer Forward KBA670-10500-42/-44

[2] or [5] Seal Retainer Forward
CC670-39247-1 Aft Fairing Seal LH CC670-39163-1

[1] or [4] Aft Fairing Seal LH

CC670-39247-2 Aft Fairing Seal RH CC670-39163-2

[2] or [5] Aft Fairing Seal RH [1] When PART A is done. [2] When PART B is done. [3] When PART A and PART B are done. [4] When PART C is done [5] When PART D is done [6] When PART C and PART D is done

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 21 of 189 Oct 12/2012 Revision E, 13 Nov/2014 2. ACCOMPLISHMENT INSTRUCTIONS

PART A --- Increase of the Clearance Between the Left MLG Inboard-Door and

the MLG Fairing
A. Job Set-Up Reference Information

REFERENCE DESIGNATION AMM 07-11-01-582-801 Jacking of the Aircraft AMM 07-11-01-586-801 Lowering of the Aircraft AMM 10-11-00-400-801 Installation of the Nose Landing Gear (NLG) Lockpin AMM 10-11-00-400-802 Installation of the Main Landing Gear (MLG) Lockpins AMM 12-00-00-867-801 Standard Aircraft Configuration for Maintenance AMM 12-20-32-640-802 Lubrication of the Main Landing Gear (MLG) AMM 20-21-00-910-801 Torquing of Threaded Fasteners AMM 20-31-00-400-801 Thermal Installation of Interference Fit Bushings AMM 20-51-00-000-801 Removal of Cotter Pins AMM 20-51-00-000-802 Removal of Lockwire AMM 20-51-00-400-801 Installation of Cotter Pins AMM 20-51-00-400-802 Installation of Lockwire AMM 20-60-13-930-801 Identification of Aircraft Parts and Assemblies AMM 32-12-01-000-802 Removal of the Inboard MLG Doors AMM 32-12-01-220-801 Clearance Check of the MLG Doors AMM 32-12-01-400-802 Installation of the Inboard MLG Doors AMM 32-12-01-820-801 Adjustment of the MLG Doors

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REFERENCE DESIGNATION AMM 32-30-00-710-801 Operational Test of the Landing-Gear Extension/ Retraction System AMM 51-23-00-100-801 Removal of Sealants AMM 57-80-85-000-802 Removal of the Main Landing Gear Door-Hinge Fairing (542AB/642AB) AMM 57-80-85-400-802 Installation of the Main Landing Gear DoorHinge Fairing (542AB/642AB) NDT 51-20-006-250 Eddy Current- Inspection Procedures NDT 51-20-008-230 Liquid Penetrant - Inspection Procedures NDT 51-20-009-210 Visual - Inspection Procedures SRM 51-21-11-001-001 Corrosion Prevention Procedures SRM 51-21-16-001-001 Finish Codes SRM 51-23-00-001-001 Pressure, Environmental, Fuel Tank and Firewall Sealing SRM 51-25-06-001-001 Fluid-Resistant (FR) Epoxy Primer SRM 51-25-16-001-001 Fluid-Resistant (FR) Polyurethane Topcoat SRM 51-25-52-001-001 Composite-Laminate Coatings SRM 51-26-00-001-001 Cleaning SRM 51-40-06-001-001 Fastener Edge Distance and Pitch SRM 51-40-11-001-001 Preparation of Fastener Holes SRM 51-41-02-001-001 Bolts, Screws and Related Items SRM 51-42-06-001-001 Solid Rivets SRM 51-42-13-001-001 CherryMax and CherryMax A Blind Rivets SRM 51-42-21-001-001 Hi-Lite Fasteners SRM 51-71-00-001-001 Typical Structural Repairs SRM 51-75-00-001-001 Graphite Repairs

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Tolerance Information

Linear Tolerances Angular Tolerance X.XX in. (X.X mm) X.X in. (X mm) +/-030” +/- 0.03 in. +/- 0.1 in. +/- 0.8 mm +/- 3 mm NOTE:The tolerances above apply to the dimensions given in this service bulletin, except when specified differently. (1) Make sure that the aircraft is in standard configuration for maintenance (refer to AMM 12-00-00-867-801). WARNING: OBEY ALL THE SAFETY PRECAUTIONS WHEN YOU DO

MAINTENANCE ON OR NEAR ELECTRICAL/ELECTRONIC EQUIPMENT. IF YOU DO NOT OBEY THE SAFETY PRECAUTIONS, INJURIES TO PERSONS AND/OR DAMAGE TO THE EQUIPMENT CAN OCCUR. (2) Open, safety, and tag the circuit breakers that follow:

CB PANEL CB NO. NAME CBP-1 A12 HEATERS TAT CBP-1 A13 HEATERS AOA R CBP-1 A14 HEATERS PITOT R CBP-1 C13 ADG HEATER CBP-1 G1 PSEU CH A CBP-1 G2 NOSE STEER CBP-1 G13 HEATERS ADS CONT 2 CBP-1 G14 HEATERS STATIC R CBP-1 LOWER T7 HEATERS PITOT L CBP-1 LOWER T8 HEATERS AOA L CBP-1 LOWER T9 HEATERS PITOT STBY CBP-1 LOWER U7 ENG IGN A CBP-2 G1 PSEU CH B CBP-2 G2 NOSE STEER

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SB 670BA---32---040 Page 24 of 189 Oct 12/2012 Revision E, 13 Nov/2014

CB PANEL NAME

CB NO. CBP-2 N6 ADG DEPLOY AUTO CBP-2 N9 MLG BAYOVHT DET CBP-2 P1 PSEU CH A CBP-2 P2 PSEU CH B CBP-2 LOWER S1 HEATERS STATIC L CBP-2 LOWER S2 HEATERS ADS CONT 1 CBP-2 LOWER S3 HEATERS ADS CONT STBY CBP-5 B10 ENG IGN B (3) Put the aircraft on jacks (refer to AMM 07-11-01-582-801). (4) Remove MLG door-hinge fairing 542AB (refer to AMM 57-80-85-000-802). (5) If necessary, remove the left MLG wheel bin (refer to AMM 53-83-89-000-801). (6) If necessary, remove the left inboard MLG door (refer to AMM 32-12-01-000-802).

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 25 of 189 Oct 12/2012 Revision E, 13 Nov/2014 B. Procedure For all aircraft Refer to Figure 1. (1) Do a detailed visual inspection of the left section of the MLG fairing as follows (refer to NDT 51-20-009-210): (a) Visually inspect to make sure that the forward and the aft stops are not missing from the MLG fairing. (b) If the forward and/or the aft stops are not missing, visually inspect that there are no loose or missing fasteners from the forward and aft stops. (c) Visually inspect along the edge of the MLG fairing adjacent the MLG door to make sure that there is no damage. Refer to the shaded area (refer to Figure 1, Sheet 2). NOTE:For this inspection, damage does not include surface scratches and/or paint deterioration. (d) Record the findings on the record sheet of Appendix A. Refer to Figure 2. (2) Do a detailed visual inspection of the left MLG inboard door as follows (refer to NDT 51-20-009-210): (a) Visually inspect the MLG inboard door to make sure that there is no missing or broken roller (2) or missing stop (1). (b) If the stop (1) is not missing, visually inspect that there are no loose or missing fasteners from the stop (1). (c) Record the findings on the record sheet of Appendix A. (d) Visually inspect that the stops (3), (4) and (5) are not damaged. (e) Visually inspect that there are no loose or missing fasteners from the stops (3), (4) and (5). (f) Visually inspect along the edge of the MLG inboard door adjacent to the MLG fairing to make sure that there is no damage. Refer to the shaded area (refer to Figure 2, Sheets 3 and 4). NOTE:For this inspection, damage does not include surface scratches and/or paint deterioration. (g) Record the findings on the record sheet of Appendix A.

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 26 of 189 Oct 12/2012 Revision E, 13 Nov/2014 Refer to Figure 3. (3) Do a detailed visual inspection of the stops (1) and (2), and the wedge (3) on the left side of the forward and the aft spars as follows (refer to NDT 51-20-009-210): (a) Visually inspect to make sure that the stops (1) and (2) are not missing. (b) If the stops (1) and/or (2) are not missing, visually inspect that there are no loose or missing fasteners from the stops (1) and/or (2). (c) Visually inspect to make sure that the wedge (3) is not missing. (d) If the wedge (3) is not missing, visually inspect that there are no loose or missing fasteners from the wedge (3). (e) Record the findings on the record sheet of Appendix A. Refer to Figures 1, 2 and 3. (4) If damage is found and/or there are missing parts and/or fasteners, speak with a representative of the Customer Response Center (CRC) at phone number 514-855-8500 for a disposition. NOTE:Refer to the record sheet of Appendix A for data. (5) If no damage is found and there is no missing part or fastener, go to the next step. NOTE:Refer to the record sheet of Appendix A for data. Refer to Figure 4. (6) Remove the roller assembly as follows: WARNING: WHEN YOU CUT THE COTTER PIN, USE EYE PROTECTION.

PIECES THAT BREAK OFF CAN CAUSE INJURY. (a) Remove and discard the cotter pin (2) (refer to AMM 20-51-00-000-802). (b) Remove and discard the nut (3). (c) Remove and discard the bolt (4), the three washers (5), the bushing (6), and the roller (1).

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 27 of 189 Oct 12/2012 Revision E, 13 Nov/2014 Refer to Figure 5. (7) Install the new roller assembly as follows:
CAUTION: DURING THE PROCEDURE PROTECT THE WORK AREA AND THE MLG. THIS WILL PREVENT DIRT, CHIPS, OR OTHER UNWANTED MATERIAL TO CAUSE DAMAGE TO THE AIRCRAFT. (a) Install the drill jig (1) on the aft member of the inboard MLG door as follows:
1 Make sure that the dowel pin of the drill jig (1) touches the aft member of the inboard MLG door (refer to Figure 5, Sheet 1, View B).
2 Make sure that the surface of the drill jig (1) touches the aft member assembly (refer to Figure 5, Sheet 1, View C). (b) With the drill bushing (2) and core drill P/N 670BA32040K90-201, increase the diameter for the holes in the two lugs of the aft member between 0.2959 in. (7.515 mm) and 0.2969 in. (7.541 mm). (c) With the reamer bushing (3) and reamer P/N 670BA32040K90-202, ream the holes of the two lugs in the aft member to a diameter of between 0.3147 in. (7.993 mm) and 0.3149 (7.998 mm). (d) Remove the drill jig (1) from the inboard MLG door. (e) Remove burrs and sharp edges from the holes of the lugs in the aft member of the inboard MLG door. (f) Make sure that the final diameter of the inboard hole in the aft member is between 0.3147 and 0.3157 in (7.99 to 8.02 mm). (g) Make sure that the final diameter of the outboard hole in the aft member is between 0.3141 and 0.3159 in (7.98 to 8.02 mm). (h) Apply chemical conversion coating on the bare metal surfaces of the bores of the two lugs of the aft member (refer to SRM 51-21-11-001-001).

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WARNING: OBEY THE PRECAUTIONS THAT FOLLOW, WHEN YOU

USE DRY ICE: - USE APPROVED EYE, MOUTH, AND BODY PROTECTION. - DO THE WORK IN AN AREA THAT HAS A GOOD FLOW OF CLEAN AIR. - DO NOT TOUCH MATERIAL THAT HAS TOUCHED DRY ICE. - OBEY THE MANUFACTURER’S INSTRUCTIONS. - DO NOT LET THE DRY ICE TOUCH YOUR SKIN, EYES, OR MOUTH. - ONLY PUT DRY ICE IN AN APPROVED CONTAINER THAT IS MADE FOR HIGH PRESSURES. - IF IRRITATION OCCURS, GET MEDICAL AID IMMEDIATELY. DRY ICE IS POISONOUS AND CAN CAUSE INJURY TO PERSONS. WARNING: OBEY THE PRECAUTIONS THAT FOLLOW WHEN YOU

USE LIQUID NITROGEN: - USE SAFETY GOGGLES. - PUT ON PROTECTIVE CLOTHING. - DO NOT LET THE LIQUID NITROGEN TOUCH YOUR SKIN, EYES, AND MOUTH. - WORK IN AN AREA THAT HAS A GOOD FLOW OF CLEAN AIR. - OBEY THE MANUFACTURER’S INSTRUCTIONS. - GET MEDICAL AID IF YOU GET LIQUID NITROGEN ON YOUR SKIN OR IN YOUR EYES OR MOUTH. LIQUID NITROGEN IS VERY COLD -195 DEGREES C (77K). IT WILL FREEZE IMMEDIATELY AND WILL CAUSE DAMAGE TO SKIN, EYES OR LUNGS. IN SUFFICIENT QUANTITIES, THE NITROGEN GAS FROM THE LIQUID NITROGEN CAN ALSO REPLACE THE OXYGEN OF THE AMBIENT AIR. THIS CAN CAUSE INJURY TO PERSONS. (i) Use liquid nitrogen or solid carbon dioxide (dry ice) to do a thermal installation of the flange bushing (7) (refer to AMM-20-31-00-400-801). (j) With MIL-PRF-81733 type IV corrosion-inhibiting compound, wet-install the flanged bushing (7) in the inboard lug of the aft member (refer to Figure 5, Sheet 2, View D and SRM 51-23-00-001-001).

### SERVICE BULLETIN 670BA---32---040

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(k) Do a fillet seal around the flanged bushing (7) (refer to Figure 5, Sheet 2, View D and SRM 51-23-00-001-001). (l) Wet-install the bushing (6) with Mastinox 6856K or CA 1000 compound through the outboard lug (refer to Figure 5, Sheet 3, View G-G and SRM 51-21-11-001-001). (m) Make sure that no compound is between the bushing (6) and the roller (5). (n) Apply Aeroshell 33 grease or equivalent on the shank of the bolt (11). (o) Install the bolt (11) with the washer (9), through the outboard lug, the bushing (6), the roller(5), the flanged bushing (7) and the inboard lug of the aft member. (p) Install the washer (12) and the nut (8). NOTE: It is not permitted to replace the washer (12) for a thinner washer. (q) Torque the nut (8) (refer to AMM 20-21-00-910-801). (r) Safety the nut (8) with the cotter pin (10) (refer to AMM 20-51-00-400-801). (s) Make sure there is a minimum clearance between the aft member and the roller (5) of 0.030 in. (0.76 mm). Refer to Figure 6. (8) Remove and discard the aft fairing seal (4) and the aft retainer seal (5) from the fairing as follows:
CAUTION: DURING THE PROCEDURE PROTECT THE WORK AREA AND THE MLG. THIS WILL PREVENT DIRT, CHIPS, OR OTHER UNWANTED MATERIAL TO CAUSE DAMAGE TO THE AIRCRAFT. (a) Remove and discard the three bolts (1), the washers (2) and the nuts (3). (b) Remove and discard the seal aft fairing (4) and the aft retainer seal (5) from the fairing.

### SERVICE BULLETIN 670BA---32---040

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(9) Remove the aft stop-fitting (14) as follows: (a) Remove the two bolts (6), the washers (10), and the nuts (11). (b) Remove and discard the stop pad (7), the laminated shim (8) and the shim (9). (c) Remove the sealant from the aft stop-fitting (14) and the sealing member (refer to Figure 6, Sheet 1, View D) (refer to AMM 51-23-00-100-801). (d) Remove the three solid rivets (17). (e) Remove and discard the bolts (12) and the nuts (13). (f) Remove the aft stop-fitting (14) from the sealing member. (g) Remove the sealant from the MLG fairing, the sealing member and on the aft stop-fitting (14) (refer to AMM 51-23-00-100-801). (10) Drill the aft stop-fitting (14) as follows: (a) Temporarily install the shim fairing (15) on the aft stop-fitting (14). Make sure that the shim fairing (15) is parallel to the edge of the aft stop-fitting (14) (refer to Figure 6, Sheet 2, View E). (b) Attach the shim fairing (15) with the bolt (6), the washer (10) and the nut (11). (c) Backdrill one hole to a diameter of 0.190 to 0.194 in (4.83 to 4.93 mm) from the shim fairing (15) to the aft stop-fitting (14). (d) Remove and discard the nut (11). (e) Remove the bolt (6), the washer (10) and the shim fairing (15). (f) Temporarily install the shim fairing (15) on the laminated shim (16). (g) Increase the diameter of two holes in the shim fairing (15) and the laminated shim (16) to 0.213 to 0.217 (5.41 to 5.51 mm). (h) Disassemble and remove burrs and sharp edges from the holes of the shim fairing (15), the laminated shim (16), and the aft stop-fitting (14). (i) Clean the bare metal surfaces of the aft stop-fitting (14) with clean dry cloths, with no lint, moist with aliphatic naphta or equivalent.

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(j) Dry the bare surfaces with clean dry cloths with no lint. (k) Apply chemical conversion compound on the bare metal surfaces of the hole in the aft stop-fitting (14) (refer to SRM 51-21-11-001-001). (l) Touch-up the hole in the aft stop-fitting (14) with epoxy primer (refer to SRM 51-25-06-001-001). (m) Touch-up the hole in the aft stop-fitting (14) with fluid resistant enamel color grey #16473 (refer to SRM 51-25-16-001-001). Refer to Figure 7. (11) Remove 0.53 in. to 0.61 in. (13.4 to 15.5 mm) of material from the aft area of the MLG fairing (refer to Figure 7, Sheet1, View D and SRM 51-71-00-001-001). NOTE:An edge distance of 0.57 in (14.50 mm) for the three holes of the aft stop-fitting (1) is necessary. (12) Install the aft stop-fitting (1) as follows: (a) Apply sealant on the mating surface of the aft stop-fitting (1) (refer to SRM 51-23-00-001-001). (b) Install the aft stop-fitting (1) on the sealing member of the MLG fairing. (c) Wet-install the two upper rivets (5) on the aft stop-fitting (1) (refer to Figure 7, View C) (SRM 51-42-06-001-001and SRM 51-23-00-001-001). (d) Wet-install one rivet (4) at the bottom of the aft stop-fitting (1) (refer to Figure 7, View C) (SRM 51-42-06-001-001 and SRM 51-23-00-001-001). (e) Wet-install the three bolts (2) and the nuts (3) (refer to SRM 51-42-21-001-001 and SRM 51-23-00-001-001). NOTE:The installation of the stop pad (7), the laminated shim (8), and the shim (9) will be incorporated in a subsequent step during the clearance check.

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 32 of 189 Oct 12/2012 Revision E, 13 Nov/2014 Refer to Figure 8. WARNING: MAKE SURE THAT THE LOCKPINS ARE INSTALLED IN THE NOSE AND

MAIN LANDING GEAR. THE NOSE AND MAIN LANDING GEAR CAN ACCIDENTALLY RETRACT AND CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT. (13) Disconnect the rod end (13) from the MLG door as follows: CAUTION: WHEN YOU CUT THE COTTER PIN, USE EYE PROTECTION. PIECES THAT BREAK OFF CAN CAUSE INJURY. (a) Remove and discard the cotter pin (7) (refer to AMM 20-51-00-000-801). CAUTION: MAKE SURE THAT A PERSON HOLDS THE MLG DOOR

ASSEMBLY IN POSITION WHEN YOU DISENGAGE THE DOOR RODS (13). IT CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT. (b) Remove the nut (8), the washer (9), the bushing (12), the washer (10) and the pin (11). (c) Lower the inboard section of the MLG door assembly against the adjacent tire. Refer to Figure 9. (14) Replace the aft seal of the MLG door as follows:
CAUTION: DURING THE PROCEDURE PROTECT THE WORK AREA AND THE MLG. THIS WILL PREVENT DIRT, CHIPS, OR OTHER UNWANTED MATERIAL TO CAUSE DAMAGE TO THE AIRCRAFT. (a) Remove the three rivets (1) and the two washers (2) from the MLG inboard door (refer to Figure 9, Sheet 1, View B). (b) Remove the three rivets (1) and the washers (2) from the MLG inboard door (refer to Figure 9, Sheet 1, View C). (c) Remove and discard the aft seal of the MLG door. (d) Make sure that the holes are not damaged or elongated.

### SERVICE BULLETIN 670BA---32---040

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(e) If the holes are damaged or elongated, increase the diameter of the hole to a maximum of 0.261 in. ( 6.63 mm) (refer to Figure 9, Sheet 3, Table 1). --- 0.176 to 0.180 in. (4.47 to 4.57 mm) --- 0.192 to 0.196 in. (4.88 to 4.98 mm) --- 0.205 to 0.209 in. (5.21 to 5.31 mm) --- 0.256 to 0.261 in. (6.50 to 6.63 mm). (f) Make sure that there is a minimum of 1.2D of edge distance on the aft seal (3) and the inboard MLG door before you drill. (g) If necessary increase the diameter of the hole in the washer (6) and/or (7) as follows:

DIAMETER OF FASTENERS HOLE DIAMETER WASHER HOLE WASHER ITEM NUMBER 0.176 TO 0.180 in. (4.47 TO 4.57 mm) N/A (6)

0.192 TO 0.196 in. (4.88 TO 4.98 mm) 0.214 TO 0.218 in. (5.44 TO 5.54 mm) (6)

0.205 TO 0.209 in. (5.21 TO 5.31 mm) 0.214 TO 0.218 in. (5.44 TO 5.54 mm) (6)

0.256 TO 0.261 in. (6.50 TO 6.63 mm) N/A (7)

(h) Align and install the aft seal (3) on the MLG door with a constant clearance of 0.11 in. (2.79 mm) (refer to Figure 9, Sheet 2, View D). (i) Backdrill six holes from the MLG door through the aft seal (3). (j) Remove the aft seal (3) from the door and remove burrs and sharp edges.

### SERVICE BULLETIN 670BA---32---040

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(k) Clean the surfaces of the aft seal (3) and the MLG door with clean dry cloths, with no lint, moist with aliphatic naphta or equivalent. (l) Dry the surfaces of the aft seal (3) and the MLG door with clean dry cloths with no lint. (m) Install the aft seal (3) on the MLG door. (n) Wet-install the blind rivets (5) through the MLG door, the aft seal (3) and the washers (4) (refer to Figure 9, View E and F) (refer to SRM 51-42-13-001-001). (o) Clean the surfaces of the aft seal (3) and the MLG door with clean dry cloths, with no lint, moist with aliphatic naphta or equivalent. (p) Dry the surfaces of the aft seal (3) and the MLG door with clean dry cloths with no lint. Refer to Figure 10. (15) Adjust the aft attachment of the outboard MLG door and the inboard MLG door as follows: WARNING: WHEN YOU CUT THE COTTER PIN, USE EYE PROTECTION.

PIECES THAT BREAK OFF CAN CAUSE INJURY. (a) Remove and discard the cotter pin (9) and the nut (6). (b) Remove the washer (5). (c) Remove and discard the washers (7) or (8). (d) Remove the bolt (1), the washer (10) and the sleeve bushing (4). (e) Apply Aeroshell No.33 grease on the sleeve bushing (4) and the shank of the bolt (1). (f) Install the sleeve bushing (4), the washer (10) and the bolt (1). (g) Move the door to the aft position until the the bushing (11) touches the bushing (12). (h) Measure the clearance between the bushings (2) and (3). (i) If the clearance is between 0.062 and 0.093 in. (1.57 to 2.36 mm), install the washer (7).

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(j) If the clearance is between 0.094 and 0.125 in. (2.39 to 3.18 mm), install the washer (8). NOTE: If the clearance is more than 0.126 (3.20 mm), speak with a representative of the Customer Response Center (CRC) at phone number 514-855-8500 for a disposition. (k) Make sure that there is a clearance of 0.030 and 0.060 in. (0.76 to 1.42 mm) after the installation of the new washer. (l) Install the washer (5) and the nut (6). (m) Torque the nut (6) (refer to AMM 20-21-00-910-801). (n) Safety the nut (6) with the cotter pin (9) (refer to AMM 20-51-00-400-801). Refer to Figure 8. (16) Attach the rod end (13) to the MLG door as follows: (a) Apply Aeroshell No.33 grease on the shank of the pin (11) and the bushing (12). (b) Make sure that there is no grease on the threads of the pin (11). (c) Align the rod end (13) with the attachment of the MLG door assembly. (d) Install the pin (11) with the washer (10) and the bushing (12) through the attachment of the MLG door assembly and the rod end (13). (e) Make sure that the head of the pin (11) points forward. (f) Install the washer (9), and the nut (8). (g) Torque the nut (8) from 50 to 70 lb·in (6.65 to 7.91 N·m) plus the running torque (refer to AMM 20-21-00-910-801). (h) Safety the nut (8) with the cotter pin (7) (refer to AMM 20-51-00-400-801).

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 36 of 189 Oct 12/2012 Revision E, 13 Nov/2014 Refer to Figure 11. (17) Remove 11 rivets from the MLG door (refer to Figure 11, Sheet 1, View B). (18) Remove 5 rivets from the upper inboard aft part of the MLG door (refer to Figure 11, Sheet 2, View C).
CAUTION: DURING THE PROCEDURE PROTECT THE WORK AREA AND THE MLG. THIS WILL PREVENT DIRT, CHIPS, OR OTHER UNWANTED MATERIAL TO CAUSE DAMAGE TO THE AIRCRAFT. (19) Do a countersinks in 11 holes on the near side of the forward member for the installation of the rivets (7). Countersunk depth of the holes on the forward member must be between 0.030 and 0.045 in. (0.76 to 1.14 mm) or the countersunk diameter must be between 0.234 and 0.269 in. (5.94 to 6.83 mm). (20) Do a countersinks in 5 holes on the near side of the upper inboard aft part of the MLG door for the installation of the rivets (7). Countersunk depth on the upper part of the MLG door must be between 0.030 and 0.045 in. (0.76 to 1.14 mm) or the countersunk diameter must be between 0.234 and 0.269 in. (5.94 to 6.83 mm). (21) Apply chemical conversion compound or equivalent in the 16 countersunk holes (refer to SRM 51-21-11-001-001). (22) Wet-install the 11 rivets (7) from the outer skin through the forward member (refer to SRM 51-42-06-001-001). (23) Wet-install the 5 rivets (7) from the outer skin through the inboard aft upper part of the MLG door (refer to SRM 51-42-06-001-001). (24) Clean the area of the forward member and the outer skin of the MLG door with clean dry cloths, with no lint, moist with aliphatic naphta or equivalent. (25) Cut the 11 rivets (7) flush with the forward member (refer to SRM 51-42-06-001-001). (26) Cut the 5 rivets (7) flush with the upper inboard aft part of the MLG door (refer to SRM 51-42-06-001-001). (27) Clean the area of the forward member, the inboard aft upper part of the MLG door and the outer skin of the MLG door with clean dry cloths, with no lint, moist with aliphatic naphta or equivalent.

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(28) Dry the bare surfaces with clean dry cloths with no lint. (29) Apply chemical conversion compound or equivalent on the cut area of the forward member and the upper inboard aft part of the MLG door. (30) Remove material from the stiffener of the MLG inboard-door forward-member as follows: (a) At 2.61 in. (66.3 mm) from the web of the forward member, make point A on the stiffener (refer to Figure 11, Sheet 3, View E-E). (b) At 0.94 in. (23.8 mm) from the web of the forward member, make a point on the stiffener. (c) At the intersection of the point at 0.94 in (23.9 mm), made at the previous step, and at 0.48 (12.2 mm) from the forward member, make point B. (d) At 0.04 in. (1.0 mm) from the web of the forward member make point C on the stiffener. (e) With a indelible ink pen, make a line and join points A, B and C, on the stiffener of the forward member. (f) Do a radius of .12 in. (3.1 mm) at point A. (g) Do a radius of 2.0 in. (50.8 mm) at point B. (h) Do a radius of 0.25 in. (6.3 mm) at point C. (i) Cut the material outboard of the line on the stiffener of the forward member (refer to SRM 52-71-00-001-001). (j) Carefully break sharp edges on the stiffener of the forward member. (k) Clean the bare surfaces of the forward member of the MLG door with clean, dry cloths with no lint, moist with aliphatic naphta or equivalent. (l) Dry the bare surfaces with clean, dry cloths with no lint. (m) Make sure that the surface finish roughness is 125 in. RHR (3.2 mm RHR) or more where the material was removed on the stiffener of the MLG door.

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 38 of 189 Oct 12/2012 Revision E, 13 Nov/2014 Refer to Figure 12. (31) Before the installation of the wheel bin, record the part number of the MLG fairing. NOTE: The part number will be necessary in a subsequent step for the identification. (32) Install the left MLG wheel bin (refer to AMM 53-83-89-400-801). (33) Identify locations PT2 to PT6 and PT9 to PT13 on the MLG door as follows: NOTE:All PT locations must be identified on the outer skin of the MLG door. NOTE:Make sure that you can see the identification mark---up when the door is in the closed position. (a) With a indelible ink pen, identify the PT2 on the forward edge of the inboard door, at 0.50 in.(12.7 mm) from the outboard edge of the angle, (refer to Figure 12, Sheet 1,View B). (b) With a indelible ink pen, identify the PT3 on the forward edge of the inboard door, aligned with the stiffener of the forward member. (c) With a indelible ink pen, identify the PT4 on the forward edge of the inboard door, at 0.50 in.(12.7 mm) from the outboard edge of the inboard door. (d) With a indelible ink pen, identify the PT5 on the forward edge of the outboard door, at 0.50 in.(12.7 mm) from the inboard edge of the outboard door. (e) With a indelible ink pen, identify the PT6 on the forward edge of the outboard door, aligned with the stiffener of the forward member. (f) With a indelible ink pen, identify the PT9 on the aft edge of the outboard door, aligned with the stiffener of the forward member. (g) With a indelible ink pen, identify the PT10 on the aft edge of the outboard door, at 0.50 in (12.7 mm) from the inboard edge of the outboard door. (h) With a indelible ink pen, identify the PT11 on the aft edge of the inboard door, at 2.50 in (63.5 mm) from the outboard edge of the inboard door. (i) With a indelible ink pen, identify the PT12 on the aft edge of the inboard door, aligned with the stiffener of the aft member. (j) With a indelible ink pen, identify the PT13 on the forward edge of the inboard door, at 0.50 in.(12.7 mm) from the outboard edge of the angle.

### SERVICE BULLETIN 670BA---32---040

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(34) Do the retraction of the main landing gear (refer to AMM 32-30-00-865-801). (35) Identify locations PT1 and PT14 to PT25 on the MLG fairing as follows: (a) With a indelible ink pen, identify the PT1 on the forward edge of the inboard door, at 1.50 in.(38.1 mm) from the end of the fairing seal, (refer to Figure 12, Sheet 2, View E). (b) With a indelible ink pen, identify the PT14 on the aft edge of the fairing, aligned with the screw on the fairing. (c) With a indelible ink pen, identify the PT15 on the aft edge of the inboard door, at 0.50 in (12.7 mm) from the more down edge of the angle, (refer to Figure 12, Sheet 2, View D). (d) With a indelible ink pen, identify the PT16 on the aft edge of the inboard door, align with the screw on the fairing. (e) With a indelible ink pen, identify the PT17 on the aft edge of the inboard door, align with the screw on the fairing. (f) With a indelible ink pen, identify the PT18 on the aft edge of the inboard door, align with the screw on the fairing. (g) With a indelible ink pen, identify the PT19 on the aft edge of the inboard door, align with the screw on the fairing. (h) With a indelible ink pen, identify the PT20 on the forward edge of the inboard door, align with the screw on the fairing. (i) With a indelible ink pen, identify the PT21 on the forward edge of the inboard door, align with the screw on the fairing. (j) With a indelible ink pen, identify the PT22 on the forward edge of the inboard door, align with the screw on the fairing. (k) With a indelible ink pen, identify the PT23 on the forward edge of the inboard door, at 0.50 in (12.7 mm) from the edge of the angle. (l) With a indelible ink pen, identify the PT24 on the forward edge of the inboard door, in line with the screw on the fairing.

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(m) With a indelible ink pen, identify the PT25 on the forward edge of the inboard door, in line with the screw on the fairing. NOTE:At this point do not remove material on the inboard MLG door or on the MLG fairing. Refer to Figure 12. (36) Measure and record the mismatches in Table 1 of Apppendix B. NOTE:At this point do not remove material on the inboard MLG door or on the MLG fairing. (37) Make sure that the mismatches are within the values shown in Table 1 of Appendix B. NOTE:Do not remove the hydraulic test fixture it will be needed in subsequent steps. (38) If the mismatches at PT 22 and PT 23 are not within -0.050 to +0.100 in. (-1.27 to +2.54 mm), speak with a representative of the Customer Response Center (CRC) at phone number 514-855-8500 for a disposition. (39) If the mismatched values recorded in Table 1 of Appendix B are not within the permitted values, do the adjustment of the MLG doors (refer to AMM 32-12-01-820-801). (40) If the adjustment of the MLG doors procedure cannot be done with the AMM task, speak with a representative of the Customer Response Center (CRC) at phone number 514-855-8500 for a disposition (refer to AMM 32-12-01-820-801). (41) If the mismatched values recorded in Table 1 of Appendix B are within the permitted values, record the clearances in Table 2 of Appendix B. (42) If the recorded clearance values are higher than the acceptable clearance values given in Table 2 of Appendix B, speak with a representative of the Customer Response Center (CRC) at phone number 514-855-8500 for a disposition (refer to AMM 32-12-01-820-801). Refer to Figure 17. (43) Record in Table 3 of Appendix B the overlap between the aft stop-fitting (1) and the MLG door stop fitting (refer to Figure 17, View C-C). (44) Do the extension of the main landing gear (refer to AMM 32-30-00-992-801). NOTE:Do not remove the hydraulic test fixture it will be needed in subsequent steps.

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 41 of 189 Oct 12/2012 Revision E, 13 Nov/2014 Refer to Figure 6 and Figure 17. (45) Remove material from the aft stop-fitting (14) as follows: NOTE:The overlap between the aft stop-fitting (14) and the MLG door stop fitting is recorded in Appendix B Table 3 (refer to Figure 17, Sheet 1, View C-C). (a) Remove material from the aft stop-fitting (14) to have a minimum overlap of 0.600 in. (15.24 mm) between the aft stop-fitting and the MLG door stop fitting (refer to Figure 6, Sheet 2, View E). NOTE:The aft stop fitting must be cut as close as possible to the stop pad. (b) Remove burrs and break sharp edges on the aft stop-fitting (14). (c) Do a radius of 0.250 in. (6.35 mm) on the aft stop-fitting (14) (refer to Figure 6, Sheet 2, View E). (d) Clean the bare surfaces of the aft stop-fitting (14) with clean dry cloths, with no lint, moist with aliphatic naphta or equivalent. (e) Dry the bare surfaces with clean dry cloths with no lint. Refer to Figure 6 and 11. (46) Do a liquid penetrant inspection or an eddy current inspection on the aft stop-fitting (14) and on the stiffener of the forward member of the MLG inboard door as follows: (a) Do a liquid penetrant inspection or an eddy current inspection on the cut section of the aft stop-fitting (14) (refer to Figure 6, Sheet 2, View E, NDT 51-20-008-230, or NDT 51-20-006-250) (b) Do a liquid penetrant inspection or an eddy current inspection on the cut section of the stiffener of the inboard MLG door (refer to Figure 11, Sheet 3, View E-E, NDT 51-20-008-230 or NDT 51-20-006-250). (c) If there is no crack on the aft stop-fitting (14) and on the stiffener of the forward member of the MLG inboard door go to next step (d) If there is a crack on the cut section of the aft stop-fitting (14), speak with a representative of the Customer Response Center (CRC) at phone number 514-855-8500 for a disposition.

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(e) If there is a crack on the cut section of the stiffener of the inboard MLG door, speak with a representative of the Customer Response Center (CRC) at phone number 514-855-8500 for a disposition. (47) If there is no crack on the aft stop-fitting (14) and/or on the MLG door stiffener do the steps that follow: (a) Apply chemical conversion compound or equivalent on the bare surfaces of the aft stop-fitting (14), the forward member stiffener of the inboard MLG door (refer to SRM 51-21-11-001-001). (b) Apply epoxy primer on the bare surfaces and the hole of the aft stop-fitting (14) (refer to SRM 51-25-06-001-001). (c) Apply epoxy primer on the bare surfaces the forward member stiffener of the inboard MLG door (refer to SRM 51-25-06-001-001). (d) Apply fluid resistant enamel color grey #16473 on the aft stop-fitting (14) and on the stiffener of the MLG inboard door (refer to SRM 51-25-16-001-001). Refer to Figure 13. (48) If necessary, remove the left MLG wheel bin (refer to AMM 53-83-89-000-801). (49) Remove of the seals (8), (10), (4), (11), and the seal retainers (5), (7), (9) as follows: (a) Remove the bolts (1), (6), (12), and the washers (3). (b) Remove and discard the nuts (2). (c) Remove the seal retainers (5), (7) and (9). (d) Remove the seals (8) and (11). (e) Remove and discard the seal (4) and (10).

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 43 of 189 Oct 12/2012 Revision E, 13 Nov/2014 Refer to Figure 12 and 14. (50) Remove material from the MLG inboard door, the outboard MLG door and the MLG fairing as follows (refer to SRM 51-75-00-001-001):
CAUTION: DURING THE PROCEDURE PROTECT THE WORK AREA AND THE MLG. THIS WILL PREVENT DIRT, CHIPS, OR OTHER UNWANTED MATERIAL TO CAUSE DAMAGE TO THE AIRCRAFT. (a) Calculate the difference between the acceptable clearance values and the actual clearance values recorded in Table 2 of Appendix B. NOTE: The removal of the material must be made on the MLG door before the removal of the material on the MLG fairing. NOTE: If you do not get the correct clearance after you remove the maximum permitted material from the MLG door, remove material from the MLG fairing. (b) On the forward section of the MLG door from PT A to PT B, remove material to a maximum of 0.13 (2.5 mm) (refer to Figure 14, Sheet 2, View G). Make sure that there is a minimum edge distance of 0.23 in. (6.0 mm) with the fasteners. (c) On the forward section of the MLG door at the end of PT A, make a radius of 0.25 in. (6.3 mm) (refer to Figure 14, Sheet 2, View J). (d) On the forward section of the MLG door, remove the material from PT B to a maximum of 0.130 in. (2.54 mm) to PT C to a maximum of 0.080 in. (2.03 mm) (refer to Figure 14, Sheet 2, View K). Make sure that there is a minimum edge distance of 0.23 in. (6.0 mm) from the fasteners. (e) On the forward section of the MLG door, remove the material from PT C to PT D to a maximum of 0.08 in. (2.0 mm) (refer to Figure 14, Sheet 2, View H). Make sure that there is a minimum edge distance of 0.23 in. (6.0 mm) from the fasteners. (f) On the forward section of the MLG door at PT D, make a radius of 0.25 in.(6.35 mm) at the end of the corner (refer to Figure 14, Sheet 2, View H). (g) Clean the bare surfaces of the edge of the inboard MLG door with clean dry cloths, with no lint, moist with aliphatic naphta or equivalent. (h) Dry the bare surfaces with clean dry cloths with no lint.

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(i) Apply chemical conversion compound or equivalent on the cut area of the inboard MLG door (refer to SRM 51-21-11-001-001). (j) On the upper forward section of the MLG fairing, between PTA and PTB, remove material up to a maximum of 0.23 in. (5.8 mm) (refer to Figure 14, Sheet 1, View C) (refer to SRM 51-75-00-001-001). Make sure that there is a minimum edge distance of 0.42 in (10.7 mm) from the fasteners. (k) On the forward lower section of the MLG fairing between PT B and PT C, remove material to a maximum of 0.16 in. (4.1 mm) (refer to Figure 14, Sheet 1, View D) (refer to SRM 51-75-00-001-001). Make sure that there is a minimum edge distance of 0.57 in (14.5 mm) from the fasteners. (l) On the aft section of the MLG fairing between PT D and PT E, remove the material to a maximum of 0.10 in. (2.5 mm) (refer to Figure 14, Sheet 1, View C) (refer to SRM 51-75-00-001-001). Make sure that there is a minimum edge distance of 0.42 in. (10.7 mm) with the fasteners. (m) On the aft section of the MLG fairing between PT E and PT F, remove the material to a maximum of 0.10 in. (2.5 mm). (refer to Figure 14, Sheet 1, View C) (refer to SRM 51-75-00-001-001). Make sure that there is a minimum edge distance of 0.57 in. (14.5 mm) with the fasteners. Refer to Figure 15. For aircraft that have not had the forward fairing seal (11) incorporated with Service Bulletin 670BA-32-030 (51) Install the forward fairing seal (11), the upper seal retainer (13), the lower seal retainer (14) and the fairing safety-guide (12) as follows: (a) Temporary install and secure the fairing forward seal (11) and the retainer seal (5) on the MLG fairing (refer to Figure 15, Sheet 1, View B) (pre-mod). (b) Backdrill the holes from the MLG fairing through the fairing forward seal (11) to a diameter of 0.165 to 0.169 in. (4.19 to 4.29 mm). (c) Remove the fairing forward seal (11) and the seal retainer (5). (d) Remove the burrs from the forward seal (11).

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 45 of 189 Oct 12/2012 Revision E, 13 Nov/2014 For aircraft that had the forward fairing seal (11) incorporated with Service Bulletin 670BA-32-030 (52) Do a detail inspection on the fairing forward seal (11) for signs of cuts or damages in the material base. NOTE:For the MLG fairing seal (11) exterior low friction polyester fabric is not part of the base rubber material rejection criteria. For all aircraft (53) Temporary install and secure the aft fairing seal (10) to the seal retainer (9) (refer to Figure 15, Sheet 2, View D). (a) Backdrill the holes from the seal retainer (9) through the aft fairing seal (10) to a diameter of 0.165 to 0.169 in. (4.19 to 4.29 mm). (b) Remove the aft fairing seal (10) and the seal retainer (9). (c) Remove the burrs from the aft fairing seal (10). (54) Temporary install and secure the fairing forward seal (11), the seal retainer (5) and the fairing safety-guide (12) on the MLG fairing (refer to Figure 15, Sheet 1, View B, (pre-mod). (a) Make the upper seal retainer (13) and lower seal retainer (14) from the seal retainer (5) as follows:
1 Make a line on the seal retainer (5) at the two ends of the fairing safety-guide (12) (refer to Figure 15, Sheet 1, View B, (Pre-Mod).
2 Make sure that the maximum and the minimum clearance between the seal retainer (5) and the fairing safety-guide (12) is 0.13 to 0.07 in. (2.54 to 1.78 mm).
3 Remove the fairing safety-guide (12), the seal retainer (5) and the fairing forward-seal (11).
4 Make sure that there is a minimum edge distance of 0.39 in. (9.9 mm) at the two ends of the seal retainer (5).
5 Cut the seal retainer (5) at the cutting line (refer to SRM 51-71-00-001-001).
6 Do a radius of 0.25 in (6.3 mm) on the upper and lower seals (refer to Figure 15, Sheet 1, View B) (pre-Mod).

### SERVICE BULLETIN 670BA---32---040

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7 Temporarily identify the two seal retainers as follows:

a Identify the upper seal retainer as item (13).
b Identify the lower seal retainer as item (14).

c Discard the middle part of the seal retainer (5). (55) Temporary install and secure the fairing forward seal (11), the upper seal retainer (13), the lower seal retainer (14), and the fairing safety-guide (12) on the MLG fairing. (56) Make sure that there is a minimum of 0.03 in. (0.76 mm) of protrusion with the fairing safety-guide (12) and the edge of the MLG fairing (refer to Figure 15, Sheet 1, View C-C). (57) Make sure that the distance between the fastener hole of the fairing safety-guide (12) and the rebate of the MLG fairing is at minimum of 0.340 in. (1.8 mm). (58) Drill two holes from the pilot holes of the fairing safety-guide (12) through the fairing forward seal (11) and the forward fairing to a diameter of 0.097 to 0.100 (2.46 to 2.54 mm). (59) Increase the diameter of the two holes from the pilot holes of the fairing safety-guide (12) through the fairing forward seal (11) and the forward fairing to 0.165 to 0.169 in. (4.19 to 4.29 mm). (60) Backdrill four holes from the MLG fairing through the fairing forward seal (11) and the fairing safety-guide (12) to a diameter of 0.165 to 0.169 in. (4.19 to 4.29 mm). (61) Do a countersink of the two new holes in the MLG fairing to a diameter of 0.331 to 0.342 in. (8.41 to 8.69 mm) for the two bolts (1), (refer to Sheet 1, View B). (62) Remove the fairing safety-guide (12), the upper seal retainer (13), the lower seal retainer (14), and the fairing forward seal (11). (63) Remove burrs from the fairing safety-guide (12), the fairing forward seal (11) and the MLG fairing.

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(64) Clean the fairing forward seal (11) and the fairing safety-guide (12), the upper seal retainer (13), the lower seal retainer (14) and the MLG fairing with clean, dry cloths with no lint, moist with aliphatic naphta or equivalent. (65) Dry the outer fairing forward-seal (11) and the fairing safety-guide (12), the upper seal retainer (13), the lower seal retainer (14) and the MLG fairing with clean, dry cloths with no lint. (66) Apply chemical conversion compound or equivalent on the bare metal surfaces of the upper seal retainer (13), the lower seal retainer (14) and the fairing safety-guide (12) (refer to SRM 51-21-11-001-001). (67) Apply epoxy primer on the bare surfaces of the upper seal retainer (13), the lower seal retainer (14) and the fairing safety-guide (12) (refer to SRM 51-25-06-001-001). (68) Apply fluid resistant enamel, color grey No.16473, on the upper seal retainer (13), the lower seal retainer (14) and the fairing safety-guide (12) (refer to SRM 51-25-16-001-001). (69) Apply composite-laminate coating on the bare surfaces of the MLG fairing (refer to SRM 51-25-52-001-001). (70) Apply epoxy primer in the countersunk holes of the MLG fairing and on the bare surfaces (refer to SRM 51-25-06-001-001). (71) Install the fairing forward seal (11), the fairing safety-guide (12), the upper seal retainer (13) and the lower seal retainer (14) as follows: (a) Install and secure the fairing forward seal (11), the fairing safety-guide (12), the upper seal retainer (13) and the lower seal retainer (14) on the MLG fairing. (b) With sealant, install the bolt (15) through the MLG fairing and the MLG fairing seal (refer to SRM 51-41-02-001-001). (c) Wet-install the bolts (1) through the MLG fairing with the washers (3) and the nuts (2) (refer to Figure 15, Sheet 1, View B) (refer to SRM 51-41-02-001-001). (d) Torque the nuts (2) and the screw (15) (refer to AMM 20-21-00-910-801). (72) Install the seal (7) and the seal retainer (8) as follows: (a) Clean the seal retainer (7), the seal (8) and the aft area of the MLG with clean, dry cloths with no lint moist with aliphatic naphta or equivalent.

### SERVICE BULLETIN 670BA---32---040

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(b) With sealant, install the bolts (1) through the MLG fairing, the seal (8), the seal retainer (7), the washers (3) and the nuts (2) (refer to SRM 51-23-00-390-810). (c) Torque the nuts (2) (refer to AMM 20-21-00-910-801). (73) Install the seal (10) and the seal retainer (9) as follows: (a) Clean the seal retainer (9), the seal (10) and the aft area of the MLG with clean, dry cloths with no lint moist with aliphatic naphta or equivalent. (b) With sealant, wet install the bolts (6) through the MLG fairing, the seal (10), the seal retainer (9), the washers (3) and the nuts (2) (refer to SRM 51-23-00-001-001). (c) Torque the nuts (2) (refer to AMM 20-21-00-910-801). (d) Clean the area of the forward and the aft MLG fairing with clean, dry cloths with no lint, moist with aliphatic naphta or equivalent. (e) Dry the area with clean, dry cloths with no lint. Refer to Figure 16. (74) Identify the left inboard MLG door as follows: (a) Carefully remove the identification plate (1) from the inboard inner skin with a plastic or phenolic scraper. (b) Clean the inboard inner skin with clean, dry cloths with no lint, moist with aliphatic naphta or equivalent. (c) Dry the forward inboard inner-skin with clean, dry cloths with no lint. (d) If necessary, apply epoxy primer on the inboard inner skin (refer to SRM 51-25-06-001-001). (e) If necessary, apply fluid resistant enamel, color grey No.16473, on the inboard inner skin (refer to SRM 51-25-16-001-001).

### SERVICE BULLETIN 670BA---32---040

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(f) Write the data on the new identification plate (1) as follows: 1 On the new identification plate, write with a indelible ink pen or equivalent in the field DWG.NO: the data that follows:

PRE-SB PART NUMBER POST-SB PART NUMBER CC670-10520-967 KBA670-10500-23 CC670-10520-2011 KBA670-10500-25 CC670-10520-2013 KBA670-10500-27 CC670-10520-2015 KBA670-10500-29 CC670-10520-13 KBA670-10500-31 KCC670-10900-1 KBA670-10500-33 KCC670-10900-3 KBA670-10500-35 KCC670-10900-5 KBA670-10500-37 KCC670-10901-1 KBA670-10500-51 KCC670-10901-3 KBA670-10500-53
2 With a indelible ink pen or equivalent, write all the other information (model, serial number, date) from the removed identification plate (1) to the new identification plate (1). (g) Discard the removed identification plate (1). (h) Install the new identification plate (1) on the MLG door as follows: 1 Put the new identification plate (1) in position (refer to Figure 16, View B). 2 Apply adhesive Magnobond 6380 or equivalent on the mating surface of new identification plate (1) and inboard inner skin (refer to SRM 51-22-00-001-001). 3 Install the new identification plate (1) in the correct position on the inboard inner skin, (refer to Figure 16, View B). 4 Carefully remove unwanted adhesive with a spatula and/or a plastic or phenolic scraper. 5 Apply a layer clear-gloss fluid resistant enamel on the new identification plate (1) (refer to SRM 51-25-16-001-001).

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 50 of 189 Oct 12/2012 Revision E, 13 Nov/2014 Refer to Figure 5. (75) With a indelible ink pen or equivalent, identify the aft member of the inboard MLG door (refer to Figure 5, Sheet 3, View F) and AMM 20-60-13-930-801).

PRE-SB PART NUMBER POST-SB PART NUMBER CC670-10571-13 KBA670-10500-45 Refer to Figure 7. (76) With an indelible ink pen or equivalent, identify the aft stop-fitting (1) of the MLG fairing (refer to AMM 20-60-13-930-801).

PRE-SB PART NUMBER POST-SB PART NUMBER CC670-39076-1 KBA670-10500-39 (77) If only PART A is done, with a indelible ink pen or equivalent, identify the left MLG fairing with the applicable part number listed in the table below (refer to AMM 20-60-13-930-801).

PRE-SB PART NUMBER POST-SB PART NUMBER BA670-00001-2085 KBA670-10500-300 CC670-39005-951 KBA670-10500-500 CC670-39005-3 KBA670-10500-700 CC670-39005-5 KBA670-10500-130 CC670-39019-49 KBA670-10500-190 CC670-39019-963 KBA670-10500-150 CC670-39019-965 KBA670-10500-170 CC670-39019-51 KBA670-10500-210 KBA670-39005-3 KBA670-10500-610 KBA670-39005-5 KBA670-10500-630 KBA670-39005-7 KBA670-10500-650 KBA670-39005-9 KBA670-10500-670

### SERVICE BULLETIN 670BA---32---040

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(78) If PART A and PART B are done or PART A and PART D are done, with a indelible ink pen or equivalent, identify the MLG fairing assembly with the applicable part number listed in the table below (refer to AMM 20-60-13-930-801).

PRE-SB PART NUMBER POST-SB PART NUMBER BA670-00001-2085 KBA670-10500-3 CC670-39005-951 KBA670-10500-5 CC670-39005-3 KBA670-10500-7 CC670-39005-5 KBA670-10500-13 CC670-39019-49 KBA670-10500-19 CC670-39019-963 KBA670-10500-15 CC670-39019-965 KBA670-10500-17 CC670-39019-51 KBA670-10500-21 KBA670-39005-3 KBA670-10500-61 KBA670-39005-5 KBA670-10500-63 KBA670-39005-7 KBA670-10500-65 KBA670-39005-9 KBA670-10500-67 (79) Apply a bead of sealant on the aft stop-fitting (1) and the sealing member (refer to Figure 7, Sheet 2, View C) (refer to SRM 51-23-00-001-001). (80) Apply epoxy primer on the rivets (4) and (5), bolts (2) and nuts (3). (refer to SRM51-25-06-001-001). (81) Apply fluid resistant enamel, color grey No.16473, on the bolt (2), the nut (3) and the rivets (4) and (5) (refer to SRM 51-25-16-001-001). (82) Apply fluid resistant enamel on the bolts (2). Refer to the external paint scheme for the color (refer to SRM 51-25-16-001-001).

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 52 of 189 Oct 12/2012 Revision E, 13 Nov/2014 Refer to Figure 9. (83) Apply aerodynamic sealant between the aft seal (3) and the MLG door (refer to Figure 9, Sheet 2, View E and SRM 51-23-00-001-001). (84) Apply epoxy primer on the aerodynamic sealant between the aft seal (3) and the MLG door (refer to SRM 51-25-06-001-001). (85) Apply fluid resistant enamel, color grey No.16473, on the aerodynamic sealant between the aft seal (3) and the MLG door (refer to SRM 51-25-16-001-001). (86) Apply fluid resistant enamel on the aerodynamic sealant between the aft seal (3) and the MLG door. Refer to the external paint scheme for the color (refer to SRM 51-25-16-001-001). Refer to Figure 11. (87) With a indelible ink pen or equivalent, identify the forward member of the inboard MLG door (refer to AMM 20-60-13-930-801). NOTE:The identification of the forward member must be done with the MLG door POST-SB number.

MLG DOOR POST-SB PART NUMBER FORWARD MEMBER POST-SB PART NUMBER KBA670-10500-25 KBA670-10500-27 KBA670-10500-29 KBA670-10500-35 KBA670-10500-37 KBA670-10500-47

MLG DOOR POST-SB PART NUMBER FORWARD MEMBER POST-SB PART NUMBER KBA670-10500-23 KBA670-10500-31 KBA670-10500-33 KBA670-10500-51 KBA670-10500-53 KBA670-10500-49

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 53 of 189 Oct 12/2012 Revision E, 13 Nov/2014

(88) If necessary, apply aerodynamic sealant in the area (refer to Figure 11, Sheet 3, View D) (refer to SRM 51-23-00-001-001). (89) If necessary apply epoxy primer on the aerodynamic sealant on the forward member (refer to SRM 51-25-06-001-001). (90) If necessary apply fluid resistant enamel, color grey No.16473, on the aerodynamic sealant of the forward member (refer to SRM51-25-16-001-001). Refer to Figure 15. (91) Identify the seal retainers (13) and (14) with the applicable part number listed in the table below (refer to AMM 20-60-13-930-801).

PRE-SB PART NUMBER POST-SB PART NUMBER Seal retainer CC670-39245-1 Upper seal retainer KBA670-10500-41 Lower seal retainer KBA670-10500-43 Refer to Figure 17. (92) If removed, do the installation of the left inboard MLG door (refer to AMM 32-12-01-400-802). (93) Do a clearance check of the left MLG doors (refer to AMM 32-12-01-220-801). NOTE:Use the post service bulletin 670BA-32-040 task to do the clearance check. NOTE:If you cannot get the final steps and gaps to agree with AMM TASK 32-12-01-220-801, AFM CDL # 32---12 (Main Landing Gear Door --- Inboard Door) can be done. This service bulletin can be completed when the requirements of step 2.B.(93) are met. (94) Do the extension of the MLG (refer to AMM 32-12-01-220-801). (95) If it is not possible to complete all the instructions in this service bulletin because of the configuration of the aircraft, speak with a representative of Bombardier Customer Response Centre at phone number 514---855---8500 or send an e-mail at thd.crj@bombardier.com for analysis and to get an approved disposition to complete this service bulletin.

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 54 of 189 Oct 12/2012 Revision E, 13 Nov/2014 C. Job Close-Out (1) Remove all tools, equipment, and unwanted materials from the work area. (2) Install left MLG door-hinge fairing 542AB (refer to AMM 57-80-85-400-802). (3) If removed, install the left MLG wheel bin (refer to AMM 53-83-89-400-801). (4) Remove the tags and close the circuit breakers that follow:

CB PANEL CB NO. NAME CBP-1 A12 HEATERS TAT CBP-1 A13 HEATERS AOA R CBP-1 A14 HEATERS PITOT R CBP-1 C13 ADG HEATER CBP-1 G1 PSEU CH A CBP-1 G2 NOSE STEER CBP-1 G13 HEATERS ADS CONT 2 CBP-1 G14 HEATERS STATIC R CBP-1 LOWER T7 HEATERS PITOT L CBP-1 LOWER T8 HEATERS AOA L CBP-1 LOWER T9 HEATERS PITOT STBY CBP-1 LOWER U7 ENG IGN A CBP-2 G1 PSEU CH B CBP-2 G2 NOSE STEER CBP-2 N6 ADG DEPLOY AUTO CBP-2 N9 MLG BAYOVHT DET CBP-2 P1 PSEU CH A CBP-2 P2 PSEU CH B CBP-2 LOWER S1 HEATERS STATIC L

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 55 of 189 Oct 12/2012 Revision E, 13 Nov/2014

CB PANEL NAME

CB NO. CBP-2 LOWER S2 HEATERS ADS CONT 1 CBP-2 LOWER S3 HEATERS ADS CONT STBY CBP-5 B10 ENG IGN B
(5) If the left wheel bin was removed, do the operational test of the MLG overheat detection and warning system (refer to AMM 26-14-04-710-801). (6) Do the lubrication of the MLG and the MLG door (refer to AMM 12-20-32-640-802). (7) Do the operational test of the landing-gear extension/retraction system (refer to AMM 32-30-00-710-801). (8) Remove the aircraft from jacks (refer to AMM 07-11-01-586-801). (9) Make sure that step 2. B (93) of PART A is completed and meet the requirements before you do the entry in the applicable logbooks. (10) When PART A of this service bulletin is completed, add the weight and balance data shown in paragraph 1.I. of this service bulletin to the Weight and Balance Manual. Under ‘Description of Change’ enter “Service Bulletin 670BA-32-040 PART A, Revision E, incorporated.” (11) When PART A of this service bulletin is completed, make this entry in the applicable logbooks: “Service Bulletin 670BA-32-040, Revision E, Landing Gear - Main Landing Gear (MLG) and Doors - Increase the Clearances Between the MLG Fairing and the MLG Doors, PART A , incorporated.”

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 56 of 189 Oct 12/2012 Revision E, 13 Nov/2014 PART B --- Increase of the Clearance Between the Right MLG Inboard-Door and the MLG Fairing
D. Job Set-Up Reference Information

REFERENCE DESIGNATION AMM 07-11-01-582-801 Jacking of the Aircraft AMM 07-11-01-586-801 Lowering of the Aircraft AMM 10-11-00-400-801 Installation of the Nose Landing Gear (NLG) Lockpin AMM 10-11-00-400-802 Installation of the Main Landing Gear (MLG) Lockpins AMM 12-00-00-867-801 Standard Aircraft Configuration for Maintenance AMM 12-20-32-640-802 Lubrication of the Main Landing Gear (MLG) AMM 20-21-00-910-801 Torquing of Threaded Fasteners AMM 20-31-00-400-801 Thermal Installation of Interference Fit Bushings AMM 20-51-00-000-801 Removal of Cotter Pins AMM 20-51-00-000-802 Removal of Lockwire AMM 20-51-00-400-801 Installation of Cotter Pins AMM 20-51-00-400-802 Installation of Lockwire AMM 20-60-13-930-801 Identification of Aircraft Parts and Assemblies AMM 32-12-01-000-802 Removal of the Inboard MLG Doors AMM 32-12-01-220-801 Clearance Check of the MLG Doors AMM 32-12-01-400-802 Installation of the Inboard MLG Doors AMM 32-12-01-820-801 Adjustment of the MLG Doors AMM 32-30-00-710-801 Operational Test of the Landing-Gear Extension/ Retraction System AMM 51-23-00-100-801 Removal of Sealants

### SERVICE BULLETIN 670BA---32---040

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REFERENCE DESIGNATION AMM 57-80-85-000-802 Removal of the Main Landing Gear Door-Hinge Fairing (542AB/642AB) AMM 57-80-85-400-802 Installation of the Main Landing Gear DoorHinge Fairing (542AB/642AB) NDT 51-20-006-250 Eddy Current - Inspection Procedures NDT 51-20-008-230 Liquid Penetrant - Inspection Procedures NDT 51-20-009-210 Visual - Inspection Procedures SRM 51-21-11-001-001 Corrosion Prevention Procedures SRM 51-21-16-001-001 Finish Codes SRM 51-23-00-001-001 Pressure, Environmental, Fuel Tank and Firewall Sealing SRM 51-25-06-001-001 Fluid-Resistant (FR) Epoxy Primer SRM 51-25-16-001-001 Fluid-Resistant (FR) Polyurethane Topcoat SRM 51-25-52-001-001 Composite-Laminate Coatings SRM 51-26-00-001-001 Cleaning SRM 51-40-06-001-001 Fastener Edge Distance and Pitch SRM 51-40-11-001-001 Preparation of Fastener Holes SRM 51-41-02-001-001 Bolts, Screws and Related Items SRM 51-42-06-001-001 Solid Rivets SRM 51-42-13-001-001 CherryMax and CherryMax A Blind Rivets SRM 51-42-21-001-001 Hi-Lite Fasteners SRM 51-71-00-001-001 Typical Structural Repairs SRM 51-75-00-001-001 Graphite Repairs

### SERVICE BULLETIN 670BA---32---040

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Tolerance Information

Linear Tolerances Angular Tolerance X.XX in. (X.X mm) X.X in. (X mm) +/-030” +/- 0.03 in. +/- 0.1 in. +/- 0.8 mm +/- 3 mm NOTE:The tolerances above apply to the dimensions given in this service bulletin, except when specified differently. (1) Make sure that the aircraft is in standard configuration for maintenance (refer to AMM 12-00-00-867-801). WARNING: OBEY ALL THE SAFETY PRECAUTIONS WHEN YOU DO

MAINTENANCE ON OR NEAR ELECTRICAL/ELECTRONIC EQUIPMENT. IF YOU DO NOT OBEY THE SAFETY PRECAUTIONS, INJURIES TO PERSONS AND/OR DAMAGE TO THE EQUIPMENT CAN OCCUR. (2) Open, safety, and tag the circuit breakers that follow:

CB PANEL CB NO. NAME CBP-1 A12 HEATERS TAT CBP-1 A13 HEATERS AOA R CBP-1 A14 HEATERS PITOT R CBP-1 C13 ADG HEATER CBP-1 G1 PSEU CH A CBP-1 G2 NOSE STEER CBP-1 G13 HEATERS ADS CONT 2 CBP-1 G14 HEATERS STATIC R CBP-1 LOWER T7 HEATERS PITOT L CBP-1 LOWER T8 HEATERS AOA L CBP-1 LOWER T9 HEATERS PITOT STBY CBP-1 LOWER U7 ENG IGN A CBP-2 G1 PSEU CH B CBP-2 G2 NOSE STEER

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 59 of 189 Oct 12/2012 Revision E, 13 Nov/2014

CB PANEL NAME

CB NO. CBP-2 N6 ADG DEPLOY AUTO CBP-2 N9 MLG BAYOVHT DET CBP-2 P1 PSEU CH A CBP-2 P2 PSEU CH B CBP-2 LOWER S1 HEATERS STATIC L CBP-2 LOWER S2 HEATERS ADS CONT 1 CBP-2 LOWER S3 HEATERS ADS CONT STBY CBP-5 B10 ENG IGN B (3) Put the aircraft on jacks (refer to AMM 07-11-01-582-801). (4) Remove the MLG door-hinge fairing 642AB (refer to AMM 57-80-85-000-802). (5) If necessary, remove the right MLG wheel bin (refer to AMM 53-83-89-000-801). (6) If necessary, remove the right inboard MLG door (refer to AMM 32-12-01-000-802).

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 60 of 189 Oct 12/2012 Revision E, 13 Nov/2014 E. Procedure For all aircraft Refer to Figure 1. (1) Do a detailed visual inspection of the right section of the MLG fairing as follows (refer to NDT 51-20-009-210): (a) Visually inspect to make sure that the forward and the aft stops are not missing from the MLG fairing. (b) If the forward and/or the aft stops are not missing, visually inspect that there are no loose or missing fasteners from the forward and aft stops. (c) Visually inspect along the edge of the MLG fairing adjacent the MLG door to make sure that there is no damage. Refer to the shaded area (refer to Figure 1, Sheet 2). NOTE:For this inspection, damage does not include surface scratches and/or paint deterioration. (d) Record the findings on the record sheet of the Appendix A. Refer to Figure 2. (2) Do a detailed visual inspection of the right MLG inboard door as follows (refer to NDT 51-20-009-210): (a) Visually inspect the MLG inboard door to make sure that there is no missing or broken roller (2) or missing stop (1). (b) If the stop (1) is not missing, visually inspect that there are no loose or missing fasteners from the stop (1). (c) Record the findings on the record sheet of Appendix A. (d) Visually inspect that the stops (3), (4) and (5) are not damaged. (e) Visually inspect that there are no loose or missing fasteners from the stops (3), (4) and (5). (f) Visually inspect along the edge of the MLG inboard door adjacent to the MLG fairing to make sure that there is no damage. Refer to the shaded area (refer to Figure 2, Sheets 3 and 4). NOTE:For this inspection, damage does not include surface scratches and/or paint deterioration. (g) Record the findings on the record sheet of Appendix A.

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 61 of 189 Oct 12/2012 Revision E, 13 Nov/2014 Refer to Figure 3. (3) Do a detailed visual inspection of the stops (1) and (2), and the wedge (3) on the right side of the forward and the aft spars as follows (refer to NDT 51-20-009-210): (a) Visually inspect to make sure that the stops (1) and (2) are not missing. (b) If the stops (1) and/or (2) are not missing, visually inspect that there are no loose or missing fasteners from the stops (1) and/or (2). (c) Visually inspect to make sure that the wedge (3) is not missing. (d) If the wedge (3) is not missing, visually inspect that there are no loose or missing fasteners from the wedge (3). (e) Record the findings on the record sheet of Appendix A. Refer to Figures 1, 2 and 3. (4) If damage is found and/or there are missing parts and/or fasteners, speak with a representative of the Customer Response Center (CRC) at phone number 514-855-8500 for a disposition. NOTE:Refer to the record sheet of Appendix A for data. (5) If no damage is found and there is no missing part or fastener, go to the next step. NOTE:Refer to the record sheet of Appendix A for data. Refer to Figure 4. (6) Remove the roller assembly as follows: WARNING: WHEN YOU CUT THE COTTER PIN, USE EYE PROTECTION.

PIECES THAT BREAK OFF CAN CAUSE INJURY. (a) Remove and discard the cotter pin (2) (refer to AMM 20-51-00-000-802). (b) Remove and discard the nut (3). (c) Remove and discard the bolt (4), the three washers (5), the bushing (6), and the roller (1).

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 62 of 189 Oct 12/2012 Revision E, 13 Nov/2014 Refer to Figure 5. (7) Install the new roller assembly as follows:
CAUTION: DURING THE PROCEDURE PROTECT THE WORK AREA AND THE MLG. THIS WILL PREVENT DIRT, CHIPS, OR OTHER UNWANTED MATERIAL TO CAUSE DAMAGE TO THE AIRCRAFT. (a) Install the drill jig (1) on the aft member of the inboard MLG door as follows:
1 Make sure that the dowel pin of the drill jig (1) touches the aft member of the inboard MLG door (refer to Figure 5, Sheet 1, View B).
2 Make sure that the surface of the drill jig (1) touches the aft member assembly (refer to Figure 5, Sheet 1, View C). (b) With the drill bushing (2) and core drill P/N 670BA32040K90-201, increase the diameter for the holes in the two lugs of the aft member to a diameter of between 0.2959 in. (7.515 mm) and 0.2969 in. (7.541 mm). (c) With the reamer bushing (3) and reamer P/N 670BA32040K90-202, ream the holes of the two lugs in the aft member to a diameter of between 0.3147 in. (7.993 mm) and 0.3149 (7.998 mm). (d) Remove the drill jig (1) from the inboard MLG door. (e) Remove burrs and sharp edges from the holes of the lugs in the aft member of the inboard MLG door. (f) Make sure that the final diameter of the inboard hole in the aft member is between 0.3147 and 0.3157 in (7.99 to 8.02 mm). (g) Make sure that the final diameter of the outboard hole in the aft member is between 0.3141 and 0.3159 in (7.98 to 8.02 mm). (h) Apply chemical conversion coating on the bare metal surfaces of the bores of the two lugs of the aft member (refer to SRM 51-21-11-001-001).

### SERVICE BULLETIN 670BA---32---040

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WARNING: OBEY THE PRECAUTIONS THAT FOLLOW, WHEN YOU

USE DRY ICE: - USE APPROVED EYE, MOUTH, AND BODY PROTECTION. - DO THE WORK IN AN AREA THAT HAS A GOOD FLOW OF CLEAN AIR. - DO NOT TOUCH MATERIAL THAT HAS TOUCHED DRY ICE. - OBEY THE MANUFACTURER’S INSTRUCTIONS. - DO NOT LET THE DRY ICE TOUCH YOUR SKIN, EYES, OR MOUTH. - ONLY PUT DRY ICE IN AN APPROVED CONTAINER THAT IS MADE FOR HIGH PRESSURES. - IF IRRITATION OCCURS, GET MEDICAL AID IMMEDIATELY. DRY ICE IS POISONOUS AND CAN CAUSE INJURY TO PERSONS. WARNING: OBEY THE PRECAUTIONS THAT FOLLOW WHEN YOU

USE LIQUID NITROGEN: - USE SAFETY GOGGLES. - PUT ON PROTECTIVE CLOTHING. - DO NOT LET THE LIQUID NITROGEN TOUCH YOUR SKIN, EYES, AND MOUTH. - WORK IN AN AREA THAT HAS A GOOD FLOW OF CLEAN AIR. - OBEY THE MANUFACTURER’S INSTRUCTIONS. - GET MEDICAL AID IF YOU GET LIQUID NITROGEN ON YOUR SKIN OR IN YOUR EYES OR MOUTH. LIQUID NITROGEN IS VERY COLD -195 DEGREES C (77K). IT WILL FREEZE IMMEDIATELY AND WILL CAUSE DAMAGE TO SKIN, EYES OR LUNGS. IN SUFFICIENT QUANTITIES, THE NITROGEN GAS FROM THE LIQUID NITROGEN CAN ALSO REPLACE THE OXYGEN OF THE AMBIENT AIR. THIS CAN CAUSE INJURY TO PERSONS. (i) Use liquid nitrogen or solid carbon dioxide (dry ice) to do a thermal installation of the flange bushing (7) (refer to AMM-20-31-00-400-801). (j) With MIL-PRF-81733 type IV corrosion-inhibiting compound, wet-install the flanged bushing (7) in the inboard lug of the aft member (refer to Figure 5, Sheet 2, View D and SRM 51-23-00-001-001).

### SERVICE BULLETIN 670BA---32---040

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(k) Do a fillet seal around the flanged bushing (7) (refer to Figure 5, Sheet 2, View D and SRM 51-23-00-001-001). (l) Wet-install the bushing (6) with Mastinox 6856K or CA 1000 compound through the outboard lug (refer to Figure 5, Sheet 3, View G-G and SRM 51-21-11-001-001). (m) Make sure that no compound is between the bushing (6) and the roller (5). (n) Apply Aeroshell 33 grease or equivalent on the shank of the bolt (11). (o) Install the bolt (11) with the washer (9), through the outboard lug, the bushing (6), the roller(5), the flanged bushing (7) and the inboard lug of the aft member. (p) Install the washer (12) and the nut (8). NOTE: It is not permitted to replace the washer (12) for a thinner washer. (q) Torque the nut (8) (refer to AMM 20-21-00-910-801). (r) Safety the nut (8) with the cotter pin (10) (refer to AMM 20-51-00-400-801). (s) Make sure there is a minimum clearance between the aft member and the roller (5) of 0.030 in. (0.76 mm). Refer to Figure 6. (8) Remove and discard the aft fairing seal (4) and the aft retainer seal (5) from the fairing as follows:
CAUTION: DURING THE PROCEDURE PROTECT THE WORK AREA AND THE MLG. THIS WILL PREVENT DIRT, CHIPS, OR OTHER UNWANTED MATERIAL TO CAUSE DAMAGE TO THE AIRCRAFT. (a) Remove and discard the three bolts (1), the washers (2) and the nuts (3). (b) Remove and discard the seal aft fairing (4) and the aft retainer seal (5) from the fairing.

### SERVICE BULLETIN 670BA---32---040

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(9) Remove the aft stop-fitting (14) as follows: (a) Remove the two bolts (6), the washers (10), and the nuts (11). (b) Remove and discard the stop pad (7), the laminated shim (8) and the shim (9). (c) Remove the sealant from the aft stop-fitting (14) and the sealing member (refer to Figure 6, Sheet 1, View D) (refer to AMM 51-23-00-100-801). (d) Remove the three solid rivets (17). (e) Remove and discard the bolts (12) and the nuts (13). (f) Remove the aft stop-fitting (14) from the sealing member. (g) Remove the sealant from the MLG fairing, the sealing member and on the aft stop-fitting (14) (refer to AMM 51-23-00-100-801). (10) Drill the aft stop-fitting (14) as follows: (a) Temporarily install the shim fairing (15) on the aft stop-fitting (14). Make sure that the shim fairing (15) is parallel to the edge of the aft stop-fitting (14) (refer to Figure 6, Sheet 2, View E). (b) Attach the shim fairing (15) with the bolt (6), the washer (10) and the nut (11). (c) Backdrill one hole to a diameter of 0.190 to 0.194 in (4.83 to 4.93 mm) from the shim fairing (15) to the aft stop-fitting (14). (d) Remove and discard the nut (11). (e) Remove the bolt (6), the washer (10) and the shim fairing (15). (f) Temporarily install the shim fairing (15) on the laminated shim (16). (g) Increase the diameter of two holes in the shim fairing (15) and the laminated shim (16) to 0.213 to 0.217 (5.41 to 5.51 mm). (h) Disassemble and remove burrs and sharp edges from the holes of the shim fairing (15), the laminated shim (16), and the aft stop-fitting (14). (i) Clean the bare metal surfaces of the aft stop-fitting (14) with clean dry cloths, with no lint, moist with aliphatic naphta or equivalent.

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(j) Dry the bare surfaces with clean dry cloths with no lint. (k) Apply chemical conversion compound on the bare metal surfaces of the hole in the aft stop-fitting (14) (refer to SRM 51-21-11-001-001). (l) Touch-up the hole in the aft stop-fitting (14) with epoxy primer (refer to SRM 51-25-06-001-001). (m) Touch-up the hole in the aft stop-fitting (14) with fluid resistant enamel color grey #16473 (refer to SRM 51-25-16-001-001). Refer to Figure 7. (11) Remove 0.53 in. to 0.61 in. (13.4 to 15.5 mm) of material from the aft area of the MLG fairing (refer to Figure 7, Sheet1, View D and SRM 51-71-00-001-001). NOTE:An edge distance of 0.57 in (14.50 mm) for the three holes of the aft stop-fitting (1) is necessary. (12) Install the aft stop-fitting (1) as follows: (a) Apply sealant on the mating surface of the aft stop-fitting (1) (refer to SRM 51-23-00-001-001). (b) Install the aft stop-fitting (1) on the sealing member of the MLG fairing. (c) Wet-install the two upper rivets (5) on the aft stop-fitting (1) (refer to Figure 7, View C) (SRM 51-42-06-001-001 and SRM 51-23-00-001-001). (d) Wet-install one rivet (4) at the bottom of the aft stop-fitting (1) (refer to Figure 7, View C) (SRM 51-42-06-001-001 and SRM 51-23-00-001-001). (e) Wet-install the three bolts (2) and the nuts (3) (refer to SRM 51-42-21-001-001 and SRM 51-23-00-001-001). NOTE:The installation of the stop pad (7), the laminated shim (8), and the shim (9) will be incorporated in a subsequent step during the clearance check.

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 67 of 189 Oct 12/2012 Revision E, 13 Nov/2014 Refer to Figure 8. WARNING: MAKE SURE THAT THE LOCKPINS ARE INSTALLED IN THE NOSE AND

MAIN LANDING GEAR. THE NOSE AND MAIN LANDING GEAR CAN ACCIDENTALLY RETRACT AND CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT. (13) Disconnect the rod end (13) from the MLG door as follows: CAUTION: WHEN YOU CUT THE COTTER PIN, USE EYE PROTECTION. PIECES THAT BREAK OFF CAN CAUSE INJURY. (a) Remove and discard the cotter pin (7) (refer to AMM 20-51-00-000-801). CAUTION: MAKE SURE THAT A PERSON HOLDS THE MLG DOOR

ASSEMBLY IN POSITION WHEN YOU DISENGAGE THE DOOR RODS (13). IT CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT. (b) Remove the nut (8), the washer (9), the bushing (12), the washer (10) and the pin (11). (c) Lower the inboard section of the MLG door assembly against the adjacent tire. Refer to Figure 9. (14) Replace the aft seal of the MLG door as follows:
CAUTION: DURING THE PROCEDURE PROTECT THE WORK AREA AND THE MLG. THIS WILL PREVENT DIRT, CHIPS, OR OTHER UNWANTED MATERIAL TO CAUSE DAMAGE TO THE AIRCRAFT. (a) Remove the three rivets (1) and the two washers (2) from the MLG inboard door (refer to Figure 9, Sheet 1, View B). (b) Remove the three rivets (1) and the washers (2) from the MLG inboard door (refer to Figure 9, Sheet 1, View C). (c) Remove and discard the aft seal of the MLG door. (d) Make sure that the holes are not damaged or elongated.

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(e) If the holes are damaged or elongated, increase the diameter of the hole to a maximum of 0.261 in. ( 6.63 mm) (refer to Figure 9, Sheet 3, Table 1). --- 0.176 to 0.180 in. (4.47 to 4.57 mm) --- 0.192 to 0.196 in. (4.88 to 4.98 mm) --- 0.205 to 0.209 in. (5.21 to 5.31 mm) --- 0.256 to 0.261 in. (6.50 to 6.63 mm) (f) Make sure that there is a minimum of 1.2D of edge distance on the aft seal (3) and the inboard MLG door before drill. (g) If necessary increase the diameter of the hole in the washer (6) and/or (7) as follows:

DIAMETER OF FASTENER HOLE DIAMETER OF WASHER HOLE WASHER ITEM NUMBER 0.176 TO 0.180 in. (4.47 TO 4.57 mm) N/A (6)

0.192 TO 0.196 in. (4.88 TO 4.98 mm) 0.214 TO 0.218 in. (5.44 TO 5.54 mm) (6)

0.205 TO 0.209 in. (5.21 TO 5.31 mm) 0.214 TO 0.218 in. (5.44 TO 5.54 mm) (6)

0.256 TO 0.261 in. (6.50 TO 6.63 mm) N/A (7)

(h) Align and install the aft seal (3) on the MLG door with a constant clearance of 0.11 in. (2.79 mm) (refer to Figure 9, Sheet 2, View D). (i) Backdrill six holes from the MLG door through the aft seal (3). (j) Remove the aft seal (3) from the door and remove burrs and sharp edges.

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(k) Clean the surfaces of the aft seal (3) and the MLG door with clean dry cloths, with no lint, moist with aliphatic naphta or equivalent. (l) Dry the surfaces of the aft seal (3) and the MLG door with clean dry cloths with no lint. (m) Install the aft seal (3) on the MLG door. (n) Wet-install the blind rivets (5) through the MLG door, the aft seal (3) and the washers (4) (refer to Figure 9, View E and F) (refer to SRM 51-42-13-001-001). (o) Clean the surfaces of the aft seal (3) and the MLG door with clean dry cloths, with no lint, moist with aliphatic naphta or equivalent. (p) Dry the surfaces of the aft seal (3) and the MLG door with clean dry cloths with no lint. Refer to Figure 10. (15) Adjust the aft attachment of the outboard MLG door and the inboard MLG door as follows: WARNING: WHEN YOU CUT THE COTTER PIN, USE EYE PROTECTION.

PIECES THAT BREAK OFF CAN CAUSE INJURY. (a) Remove and discard the cotter pin (9) and the nut (6). (b) Remove the washer (5). (c) Remove and discard the washers (7) or (8). (d) Remove the bolt (1), the washer (10) and the sleeve bushing (4). (e) Apply Aeroshell No.33 grease on the sleeve bushing (4) and the shank of the bolt (1). (f) Install the sleeve bushing (4), the washer (10) and the bolt (1). (g) Move the door to the aft position until the the bushing (11) touches the bushing (12). (h) Measure the clearance between the bushings (2) and (3). (i) If the clearance is between 0.062 and 0.093 in. (1.57 to 2.36 mm), install the washer (7).

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(j) If the clearance is between 0.094 and 0.125 in. (2.39 to 3.18 mm), install the washer (8). NOTE: If the clearance is more than 0.126 (3.20 mm), speak with a representative of the Customer Response Center (CRC) at phone number 514-855-8500 for a disposition. (k) Make sure that there is a clearance of 0.030 and 0.060 in. (0.76 to 1.42 mm) after the installation of the new washer. (l) Install the washer (5) and the nut (6). (m) Torque the nut (6) (refer to AMM 20-21-00-910-801). (n) Safety the nut (6) with the cotter pin (9) (refer to AMM 20-51-00-400-801). Refer to Figure 8. (16) Attach the rod end (13) to the MLG door as follows: (a) Apply Aeroshell No.33 grease on the shank of the pin (11) and the bushing (12). (b) Make sure that there is no grease on the threads of the pin (11). (c) Align the rod end (13) with the attachment of the MLG door assembly. (d) Install the pin (11) with the washer (10) and the bushing (12) through the attachment of the MLG door assembly and the rod end (13). (e) Make sure that the head of the pin (11) points forward. (f) Install the washer (9), and the nut (8). (g) Torque the nut (8) from 50 to 70 lb·in (6.65 to 7.91 N·m) plus the running torque (refer to AMM 20-21-00-910-801). (h) Safety the nut (8) with the cotter pin (7) (refer to AMM 20-51-00-400-801).

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 71 of 189 Oct 12/2012 Revision E, 13 Nov/2014 Refer to Figure 11. (17) Remove 11 rivets from the MLG door (refer to Figure 11, Sheet 1, View B). (18) Remove 5 rivets from the upper inboard aft part of the MLG door (refer to Figure 11, Sheet 2, View C).
CAUTION: DURING THE PROCEDURE PROTECT THE WORK AREA AND THE MLG. THIS WILL PREVENT DIRT, CHIPS, OR OTHER UNWANTED MATERIAL TO CAUSE DAMAGE TO THE AIRCRAFT. (19) Do a countersinks in 11 holes on the near side of the forward member for the installation of the rivets (7). Countersunk depth of the holes on the forward member must be between 0.030 and 0.045 in. (0.76 to 1.14 mm) or the countersunk diameter must be between 0.234 and 0.269 in. (5.94 to 6.83 mm). (20) Do a countersinks in 5 holes on the near side of the upper inboard aft part of the MLG door for the installation of the rivets (7). Countersunk depth on the upper part of the MLG door must be between 0.030 and 0.045 in. (0.76 to 1.14 mm) or the countersunk diameter must be between 0.234 and 0.269 in. (5.94 to 6.83 mm). (21) Apply chemical conversion compound or equivalent in the 16 countersunk holes (refer to SRM 51-21-11-001-001). (22) Wet-install the 11 rivets (7) from the outer skin through the forward member (refer to SRM 51-42-06-001-001). (23) Wet-install the 5 rivets (7) from the outer skin through the inboard aft upper part of the MLG door (refer to SRM 51-42-06-001-001). (24) Clean the area of the forward member and the outer skin of the MLG door with clean dry cloths, with no lint, moist with aliphatic naphta or equivalent. (25) Cut the 11 rivets (7) flush with the forward member (refer to SRM 51-42-06-001-001). (26) Cut the 5 rivets (7) flush with the upper inboard aft part of the MLG door (refer to SRM 51-42-06-001-001). (27) Clean the area of the forward member, the inboard aft upper part of the MLG door and the outer skin of the MLG door with clean dry cloths, with no lint, moist with aliphatic naphta or equivalent.

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(28) Dry the bare surfaces with clean dry cloths with no lint. (29) Apply chemical conversion compound or equivalent on the cut area of the forward member and the upper inboard aft part of the MLG door. (30) Remove material from the stiffener of the MLG inboard-door forward-member as follows: (a) At 2.61 in. (66.3 mm) from the web of the forward member, make point A on the stiffener (refer to Figure 11, Sheet 3, View E-E). (b) At 0.94 in. (23.8 mm) from the web of the forward member, make a point on the stiffener. (c) At the intersection of the point at 0.94 in (23.9 mm), made at the previous step, and at 0.48 (12.2 mm) from the forward member, make point B. (d) At 0.04 in. (1.0 mm) from the web of the forward member make point C on the stiffener. (e) With a indelible ink pen, make a line and join points A, B and C, on the stiffener of the forward member. (f) Do a radius of .12 in. (3.1 mm) at point A. (g) Do a radius of 2.0 in. (50.8 mm) at point B. (h) Do a radius of 0.25 in. (6.3 mm) at point C. (i) Cut the material outboard of the line on the stiffener of the forward member (refer to SRM 52-71-00-001-001). (j) Carefully break sharp edges on the stiffener of the forward member. (k) Clean the bare surfaces of the forward member of the MLG door with clean, dry cloths with no lint, moist with aliphatic naphta or equivalent. (l) Dry the bare surfaces with clean, dry cloths with no lint. (m) Make sure that the surface finish roughness is 125 in. RHR (3.2 mm RHR) or more where the material was removed on the stiffener of the MLG door.

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 73 of 189 Oct 12/2012 Revision E, 13 Nov/2014 Refer to Figure 12. (31) Before the installation of the wheel bin, record the part number of the MLG fairing. NOTE: The part number will be necessary in a subsequent step for the identification. (32) Install the left MLG wheel bin (refer to AMM 53-83-89-400-801). (33) Identify locations PT2 to PT6 and PT9 to PT13 on the MLG door as follows: NOTE:All PT locations must be identified on the outer skin of the MLG door. NOTE:Make sure that you can see the identification mark---up when the door is in the closed position. (a) With a indelible ink pen, identify the PT2 on the forward edge of the inboard door, at 0.50 in.(12.7 mm) from the outboard edge of the angle, (refer to Figure 12, Sheet 1,View B). (b) With a indelible ink pen, identify the PT3 on the forward edge of the inboard door, aligned with the stiffener of the forward member. (c) With a indelible ink pen, identify the PT4 on the forward edge of the inboard door, at 0.50 in.(12.7 mm) from the outboard edge of the inboard door. (d) With a indelible ink pen, identify the PT5 on the forward edge of the outboard door, at 0.50 in.(12.7 mm) from the inboard edge of the outboard door. (e) With a indelible ink pen, identify the PT6 on the forward edge of the outboard door, aligned with the stiffener of the forward member. (f) With a indelible ink pen, identify the PT9 on the aft edge of the outboard door, aligned with the stiffener of the forward member. (g) With a indelible ink pen, identify the PT10 on the aft edge of the outboard door, at 0.50 in (12.7 mm) from the inboard edge of the outboard door. (h) With a indelible ink pen, identify the PT11 on the aft edge of the inboard door, at 2.50 in (63.5 mm) from the outboard edge of the inboard door.

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(i) With a indelible ink pen, identify the PT12 on the aft edge of the inboard door, aligned with the stiffener of the aft member. (j) With a indelible ink pen, identify the PT13 on the forward edge of the inboard door, at 0.50 in.(12.7 mm) from the outboard edge of the angle. (34) Do the retraction of the main landing gear (refer to AMM 32-30-00-865-801). (35) Identify locations PT1 and PT14 to PT25 on the MLG fairing as follows: (a) With a indelible ink pen, identify the PT1 on the forward edge of the inboard door, at 1.50 in.(38.1 mm) from the end of the fairing seal, (refer to Figure 12, Sheet 2, View E). (b) With a indelible ink pen, identify the PT14 on the aft edge of the fairing, aligned with the screw on the fairing. (c) With a indelible ink pen, identify the PT15 on the aft edge of the inboard door, at 0.50 in (12.7 mm) from the more down edge of the angle, (refer to Figure 12, Sheet 2, View D). (d) With a indelible ink pen, identify the PT16 on the aft edge of the inboard door, align with the screw on the fairing. (e) With a indelible ink pen, identify the PT17 on the aft edge of the inboard door, align with the screw on the fairing. (f) With a indelible ink pen, identify the PT18 on the aft edge of the inboard door, align with the screw on the fairing. (g) With a indelible ink pen, identify the PT19 on the aft edge of the inboard door, align with the screw on the fairing. (h) With a indelible ink pen, identify the PT20 on the forward edge of the inboard door, align with the screw on the fairing. (i) With a indelible ink pen, identify the PT21 on the forward edge of the inboard door, align with the screw on the fairing. (j) With a indelible ink pen, identify the PT22 on the forward edge of the inboard door, align with the screw on the fairing. (k) With a indelible ink pen, identify the PT23 on the forward edge of the inboard door, at 0.50 in (12.7 mm) from the edge of the angle. (l) With a indelible ink pen, identify the PT24 on the forward edge of the inboard door, in line with the screw on the fairing.

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(m) With a indelible ink pen, identify the PT25 on the forward edge of the inboard door, in line with the screw on the fairing. NOTE:At this point do not remove material on the inboard MLG door or on the MLG fairing. Refer to Figure 12. (36) Measure and record the mismatches in Table 1 of Apppendix B. NOTE:At this point do not remove material on the inboard MLG door or on the MLG fairing. (37) Make sure that the mismatches are within the values shown in Table 1 of Appendix B. NOTE:Do not remove the hydraulic test fixture it will be needed in further steps. (38) If the mismatches at PT 22 and PT 23 are not within -0.050 to +0.100 in. (-1.27 to +2.54 mm), speak with a representative of the Customer Response Center (CRC) at phone number 514-855-8500 for a disposition. (39) If the mismatched values recorded in Table 1 of Appendix B are not within the permitted values, do the adjustment of the MLG doors (refer to AMM 32-12-01-820-801). (40) If the adjustment of the MLG doors procedure cannot be done with the AMM task, speak with a representative of the Customer Response Center (CRC) at phone number 514-855-8500 for a disposition (refer to AMM 32-12-01-820-801). (41) If the mismatched values recorded in Table 1 of Appendix B are within the permitted values, record the clearances in Table 2 of Appendix B. (42) If the recorded clearance values are higher than the acceptable clearance values given in Table 2 of Appendix B, speak with a representative of the Customer Response Center (CRC) at phone number 514-855-8500 for a disposition (refer to AMM 32-12-01-820-801). Refer to Figure 17. (43) Record in Table 3 of Appendix B the overlap between the aft stop-fitting (1) and the MLG door stop fitting (refer to Figure 17, View C-C). (44) Do the extension of the main landing gear (refer to AMM 32-30-00-992-801). NOTE:Do not remove the hydraulic test fixture it will be needed in subsequent steps.

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 76 of 189 Oct 12/2012 Revision E, 13 Nov/2014 Refer to Figure 6 and Figure 17. (45) Remove material from the aft stop-fitting (14) as follows: NOTE:The overlap between the aft stop-fitting (14) and the MLG door stop fitting is recorded in Appendix B Table 3 (refer to Figure 17, Sheet 1, View C-C). (a) Remove material from the aft stop-fitting (14) to have a minimum overlap of 0.600 in. (15.24 mm) between the aft stop-fitting and the MLG door stop fitting (refer to Figure 6, Sheet 2, View E). NOTE:The aft stop fitting must be cut as close as possible to the stop pad. (b) Remove burrs and break sharp edges on the aft stop-fitting (14). (c) Do a radius of 0.250 in. (6.35 mm) on the aft stop-fitting (14) (refer to Figure 6, Sheet 2, View E). (d) Clean the bare surfaces of the aft stop-fitting (14) with clean dry cloths, with no lint, moist with aliphatic naphta or equivalent. (e) Dry the bare surfaces with clean dry cloths with no lint. Refer to Figure 6 and 11. (46) Do a liquid penetrant inspection or an eddy current inspection on the aft stop-fitting (14) and on the stiffener of the forward member of the MLG inboard door as follows: (a) Do a liquid penetrant inspection or an eddy current inspection on the cut section of the aft stop-fitting (14) (refer to Figure 6, Sheet 2, View E, NDT 51-20-008-230, or NDT 51-20-006-250) (b) Do a liquid penetrant inspection or an eddy current inspection on the cut section of the stiffener of the inboard MLG door (refer to Figure 11, Sheet 3, View E-E, NDT 51-20-008-230 or NDT 51-20-006-250). (c) If there is no crack on the aft stop-fitting (14) and on the stiffener of the forward member of the MLG inboard door go to next step (d) If there is a crack on the cut section of the aft stop-fitting (14), speak with a representative of the Customer Response Center (CRC) at phone number 514-855-8500 for a disposition. (e) If there is a crack on the cut section of the stiffener of the inboard MLG door, speak with a representative of the Customer Response Center (CRC) at phone number 514-855-8500 for a disposition.

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(47) If there is no crack on the aft stop-fitting (14) and/or on the MLG door stiffener do the steps that follow: (a) Apply chemical conversion compound or equivalent on the bare surfaces of the aft stop-fitting (14), the forward member stiffener of the inboard MLG door (refer to SRM 51-21-11-001-001). (b) Apply epoxy primer on the bare surfaces and the hole of the aft stop-fitting (14) (refer to SRM 51-25-06-001-001). (c) Apply epoxy primer on the bare surfaces the forward member stiffener of the inboard MLG door (refer to SRM 51-25-06-001-001). (d) Apply fluid resistant enamel color grey #16473 on the aft stop-fitting (14) and on the stiffener of the MLG inboard door (refer to SRM 51-25-16-001-001). Refer to Figure 13. (48) If necessary, remove the left MLG wheel bin (refer to AMM 53-83-89-000-801). (49) Remove of the seals (8), (10), (4), (11), and the seal retainers (5), (7), (9) as follows: (a) Remove the bolts (1), (6), (12), and the washers (3). (b) Remove and discard the nuts (2). (c) Remove the seal retainers (5), (7) and (9). (d) Remove the seals (8) and (11). (e) Remove and discard the seal (4) and (10).

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 78 of 189 Oct 12/2012 Revision E, 13 Nov/2014 Refer to Figure 12 and 14. (50) Remove material from the MLG inboard door, the outboard MLG door and the MLG fairing as follows (refer to SRM 51-75-00-001-001):
CAUTION: DURING THE PROCEDURE PROTECT THE WORK AREA AND THE MLG. THIS WILL PREVENT DIRT, CHIPS, OR OTHER UNWANTED MATERIAL TO CAUSE DAMAGE TO THE AIRCRAFT. (a) Calculate the difference between the acceptable clearance values and the actual clearance values recorded in Table 2 of Appendix B. NOTE: The removal of the material must be made on the MLG door before the removal of the material on the MLG fairing. NOTE: If you do not get the correct clearance after you remove the maximum permitted material from the MLG door, remove material from the MLG fairing. (b) On the forward section of the MLG door from PT A to PT B, remove material to a maximum of 0.13 (2.5 mm) (refer to Figure 14, Sheet 2, View G). Make sure that there is a minimum edge distance of 0.23 in. (6.0 mm) with the fasteners. (c) On the forward section of the MLG door at the end of PT A, make a radius of 0.25 in. (6.3 mm) (refer to Figure 14, Sheet 2, View J). (d) On the forward section of the MLG door, remove the material from PT B to a maximum of 0.130 in. (2.54 mm) to PT C to a maximum of 0.080 in. (2.03 mm) (refer to Figure 14, Sheet 2, View K). Make sure that there is a minimum edge distance of 0.23 in. (6.0 mm) from the fasteners. (e) On the forward section of the MLG door, remove the material from PT C to PT D to a maximum of 0.08 in. (2.0 mm) (refer to Figure 14, Sheet 2, View H). Make sure that there is a minimum edge distance of 0.23 in. (6.0 mm) from the fasteners. (f) On the forward section of the MLG door at PT D, make a radius of 0.25 in.(6.35 mm) at the end of the corner (refer to Figure 14, Sheet 2, View H). (g) Clean the bare surfaces of the edge of the inboard MLG door with clean dry cloths, with no lint, moist with aliphatic naphta or equivalent. (h) Dry the bare surfaces with clean dry cloths with no lint.

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(i) Apply chemical conversion compound or equivalent on the cut area of the inboard MLG door (refer to SRM 51-21-11-001-001). (j) On the upper forward section of the MLG fairing, between PTA and PTB, remove material up to a maximum of 0.23 in. (5.8 mm) (refer to Figure 14, Sheet 1, View C) (refer to SRM 51-75-00-001-001). Make sure that there is a minimum edge distance of 0.42 in (10.7 mm) from the fasteners. (k) On the forward lower section of the MLG fairing between PT B and PT C, remove material to a maximum of 0.16 in. (4.1 mm) (refer to Figure 14, Sheet 1, View D) (refer to SRM 51-75-00-001-001). Make sure that there is a minimum edge distance of 0.57 in (14.5 mm) from the fasteners. (l) On the aft section of the MLG fairing between PT D and PT E, remove the material to a maximum of 0.10 in. (2.5 mm) (refer to Figure 14, Sheet 1, View C) (refer to SRM 51-75-00-001-001). Make sure that there is a minimum edge distance of 0.42 in. (10.7 mm) with the fasteners. (m) On the aft section of the MLG fairing between PT E and PT F, remove the material to a maximum of 0.10 in. (2.5 mm). (refer to Figure 14, Sheet 1, View C) (refer to SRM 51-75-00-001-001). Make sure that there is a minimum edge distance of 0.57 in. (14.5 mm) with the fasteners. Refer to Figure 15. For aircraft that have not had the forward fairing seal (11) incorporated with Service Bulletin 670BA-32-030 (51) Install the forward fairing seal (11), the upper seal retainer (13), the lower seal retainer (14) and the fairing safety-guide (12) as follows: (a) Temporary install and secure the fairing forward seal (11) and the retainer seal (5) on the MLG fairing (refer to Figure 15, Sheet 1, View B) (pre-mod). (b) Backdrill the holes from the MLG fairing through the fairing forward seal (11) to a diameter of 0.165 to 0.169 in. (4.19 to 4.29 mm). (c) Remove the fairing forward seal (11) and the seal retainer (5). (d) Remove the burrs from the forward seal (11).

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 80 of 189 Oct 12/2012 Revision E, 13 Nov/2014 For aircraft that had the forward fairing seal (11) incorporated with Service Bulletin 670BA-32-030 (52) Do a detail inspection on the fairing forward seal (11) for signs of cuts or damages in the material base. NOTE:For the MLG fairing seal (11) exterior low friction polyester fabric is not part of the base rubber material rejection criteria. For all aircraft (53) Temporary install and secure the aft fairing seal (10) to the seal retainer (9) (refer to Figure 15, Sheet 2, View D). (a) Backdrill the holes from the seal retainer (9) through the aft fairing seal (10) to a diameter of 0.165 to 0.169 in. (4.19 to 4.29 mm). (b) Remove the aft fairing seal (10) and the seal retainer (9). (c) Remove the burrs from the aft fairing seal (10). (54) Temporary install and secure the fairing forward seal (11), the seal retainer (5) and the fairing safety-guide (12) on the MLG fairing (refer to Figure 15, Sheet 1, View B, (pre-mod). (a) Make the upper seal retainer (13) and lower seal retainer (14) from the seal retainer (5) as follows:
1 Make a line on the seal retainer (5) at the two ends of the fairing safety-guide (12) (refer to Figure 15, Sheet 1, View B, (Pre-Mod).
2 Make sure that the maximum and the minimum clearance between the seal retainer (5) and the fairing safety-guide (12) is 0.13 to 0.07 in. (2.54 to 1.78 mm).
3 Remove the fairing safety-guide (12), the seal retainer (5) and the fairing forward-seal (11).
4 Make sure that there is a minimum edge distance of 0.39 in. (9.9 mm) at the two ends of the seal retainer (5).

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5 Cut the seal retainer (5) at the cutting line (refer to SRM 51-71-00-001-001).
6 Do a radius of 0.25 in (6.3 mm) on the upper and lower seals (refer to Figure 15, Sheet 1, View B) (pre-Mod).
7 Temporarily identify the two seal retainers as follows:

a Identify the upper seal retainer as item (13).
b Identify the lower seal retainer as item (14).

c Discard the middle part of the seal retainer (5). (55) Temporary install and secure the fairing forward seal (11), the upper seal retainer (13), the lower seal retainer (14), and the fairing safety-guide (12) on the MLG fairing. (56) Make sure that there is a minimum of 0.03 in. (0.76 mm) of protrusion with the fairing safety-guide (12) and the edge of the MLG fairing (refer to Figure 15, Sheet 1, View C-C). (57) Make sure that the distance between the fastener hole of the fairing safety-guide (12) and the rebate of the MLG fairing is at minimum of 0.340 in. (1.8 mm). (58) Drill two holes from the pilot holes of the fairing safety-guide (12) through the fairing forward seal (11) and the forward fairing to a diameter of 0.097 to 0.100 (2.46 to 2.54 mm). (59) Increase the diameter of the two holes from the pilot holes of the fairing safety-guide (12) through the fairing forward seal (11) and the forward fairing to 0.165 to 0.169 in. (4.19 to 4.29 mm). (60) Backdrill four holes from the MLG fairing through the fairing forward seal (11) and the fairing safety-guide (12) to a diameter of 0.165 to 0.169 in. (4.19 to 4.29 mm). (61) Do a countersink of the two new holes in the MLG fairing to a diameter of 0.331 to 0.342 in. (8.41 to 8.69 mm) for the two bolts (1), (refer to Sheet 1, View B). (62) Remove the fairing safety-guide (12), the upper seal retainer (13), the lower seal retainer (14), and the fairing forward seal (11).

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(63) Remove burrs from the fairing safety-guide (12), the fairing forward seal (11) and the MLG fairing. (64) Clean the fairing forward seal (11) and the fairing safety-guide (12), the upper seal retainer (13), the lower seal retainer (14) and the MLG fairing with clean, dry cloths with no lint, moist with aliphatic naphta or equivalent. (65) Dry the outer fairing forward seal (11) and the fairing safety-guide (12), the upper seal retainer (13), the lower seal retainer (14) and the MLG fairing with clean, dry cloths with no lint. (66) Apply chemical conversion compound or equivalent on the bare metal surfaces of the upper seal retainer (13), the lower seal retainer (14) and the fairing safety-guide (12) (refer to SRM 51-21-11-001-001). (67) Apply epoxy primer on the bare surfaces of the upper seal retainer (13), the lower seal retainer (14) and the fairing safety-guide (12) (refer to SRM 51-25-06-001-001). (68) Apply fluid resistant enamel, color grey No.16473, on the upper seal retainer (13), the lower seal retainer (14) and the fairing safety-guide (12) (refer to SRM 51-25-16-001-001). (69) Apply composite-laminate coating on the bare surfaces of the MLG fairing (refer to SRM 51-25-52-001-001). (70) Apply epoxy primer in the countersunk holes of the MLG fairing and on the bare surfaces (refer to SRM 51-25-06-001-001). (71) Install the fairing forward seal (11), the fairing safety-guide (12), the upper seal retainer (13) and the lower seal retainer (14) as follows: (a) Install and secure the fairing forward seal (11), the fairing safety-guide (12), the upper seal retainer (13) and the lower seal retainer (14) on the MLG fairing. (b) With sealant, install the bolt (15) through the MLG fairing and the MLG fairing seal (refer to SRM 51-41-02-001-001). (c) Wet-install the bolts (1) through the MLG fairing with the washers (3) and the nuts (2) (refer to Figure 15, Sheet 1, View B and SRM 51-41-02-001-001). (d) Torque the nuts (2) and the bolt (15) (refer to AMM 20-21-00-910-801).

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(72) Install the seal retainer (7) and the seal (8) as follows: (a) Clean the seal retainer (7), the seal (8) and the aft area of the MLG with clean, dry cloths with no lint moist with aliphatic naphta or equivalent. (b) With sealant, install the bolts (1) through the MLG fairing, the seal (8), the seal retainer (7), the washers (3) and the nuts (2) (refer to SRM 51-23-00-390-810). (c) Torque the nuts (2) (refer to AMM 20-21-00-910-801). (73) Install the seal (10) and the seal retainer (9) as follows: (a) Clean the seal retainer (9), the seal (10) and the aft area of the MLG with clean, dry cloths with no lint moist with aliphatic naphta or equivalent. (b) With sealant, wet install the bolts (6) through the MLG fairing, the seal (10), the seal retainer (9), the washers (3) and the nuts (2) (refer to SRM 51-23-00-001-001). (c) Torque the nuts (2) (refer to AMM 20-21-00-910-801). (d) Clean the area of the forward and the aft MLG fairing with clean, dry cloths with no lint, moist with aliphatic naphta or equivalent. (e) Dry the area with clean, dry cloths with no lint. Refer to Figure 16. (74) Identify the right inboard MLG door as follows (a) Carefully remove the identification plate (1) from the inboard inner skin with a plastic or phenolic scraper. (b) Clean the inboard inner skin with clean, dry cloths with no lint, moist with aliphatic naphta or equivalent. (c) Dry the forward inboard inner-skin with clean, dry cloths with no lint. (d) If necessary, apply epoxy primer on the inboard inner skin (refer to SRM 51-25-06-001-001). (e) If necessary, apply fluid resistant enamel, color grey No.16473, on the inboard inner skin (refer to SRM 51-25-16-001-001).

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(f) Write the data on the new identification plate (1) as follows:
1 On the new identification plate, write with a indelible ink pen or equivalent in the field DWG.NO: the data that follows:

PRE-SB PART NUMBER POST-SB PART NUMBER CC670-10520-968 KBA670-10500-24 CC670-10520-2012 KBA670-10500-26 CC670-10520-2014 KBA670-10500-28 CC670-10520-2016 KBA670-10500-30 CC670-10520-14 KBA670-10500-32 KCC670-10900-2 KBA670-10500-34 KCC670-10900-4 KBA670-10500-36 KCC670-10900-6 KBA670-10500-38 KCC670-10901-2 KBA670-10500-52 KCC670-10901-4 KBA670-10500-54

2 With a indelible ink pen or equivalent, write all the other information (model, serial number, date) from the removed identification plate (1) to the new identification plate (1). (g) Discard the removed identification plate (1). (h) Install the new identification plate (1) on the MLG door as follows:
1 Put the new identification plate (1) in position (refer to Figure 16, View B).
2 Apply adhesive Magnobond 6380 or equivalent on the mating surface of new identification plate (1) and inboard inner skin (refer to SRM 51-22-00-001-001).
3 Install the new identification plate (1) in the correct position on the inboard inner skin.

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4 Carefully remove unwanted adhesive with a spatula and/or a plastic or phenolic scraper.
5 Apply a layer clear-gloss fluid resistant enamel CMS 565-02 on the new identification plate (1) (refer to SRM 51-25-16-001-001). Refer to Figure 5. (75) With an indelible ink pen or equivalent, identify the aft member of the inboard MLG door (refer to Figure 5, Sheet 3, View F) (refer to AMM 20-60-13-930-801).

PRE-SB PART NUMBER POST-SB PART NUMBER CC670-10571-14 KBA670-10500-46
Refer to Figure 7. (76) With an indelible ink pen or equivalent, identify the aft stop-fitting (1) of the MLG fairing per (refer to AMM 20-60-13-930-801).

PRE-SB PART NUMBER POST-SB PART NUMBER CC670-39076-2 KBA670-10500-40
(77) If only PART B is done, with a indelible ink pen or equivalent, identify the right MLG fairing with the applicable part number listed in the table below (refer to AMM 20-60-13-930-801).

PRE-SB PART NUMBER POST-SB PART NUMBER BA670-00001-2085 KBA670-10500-350 CC670-39005-951 KBA670-10500-550 CC670-39005-3 KBA670-10500-750 CC670-39005-5 KBA670-10500-135 CC670-39019-49 KBA670-10500-195 CC670-39019-963 KBA670-10500-155

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 86 of 189 Oct 12/2012 Revision E, 13 Nov/2014 PRE-SB PART NUMBER POST-SB PART NUMBER CC670-39019-965 KBA670-10500-175 CC670-39019-51 KBA670-10500-215 KBA670-39005-3 KBA670-10500-615 KBA670-39005-5 KBA670-10500-635 KBA670-39005-7 KBA670-10500-655 KBA670-39005-9 KBA670-10500-675
(78) If PART A and PART B are done or PART B and PART C are done, with an indelible ink pen or equivalent, identify the MLG fairing with the applicable part number listed in the table below (refer to AMM 20-60-13-930-801).

PRE-SB PART NUMBER POST-SB PART NUMBER BA670-00001-2085 KBA670-10500-3 CC670-39005-951 KBA670-10500-5 CC670-39005-3 KBA670-10500-7 CC670-39005-5 KBA670-10500-13 CC670-39019-49 KBA670-10500-19 CC670-39019-963 KBA670-10500-15 CC670-39019-965 KBA670-10500-17 CC670-39019-51 KBA670-10500-21 KBA670-39005-3 KBA670-10500-61 KBA670-39005-5 KBA670-10500-63 KBA670-39005-7 KBA670-10500-65 KBA670-39005-9 KBA670-10500-67 (79) Apply a bead of sealant on the aft stop-fitting (1) and the sealing member (refer to Figure 7, View C) (refer to SRM 51-23-00-001-001). (80) Apply epoxy primer on the rivets (4) and (5), the bolts (2) and the nuts (3) (refer to SRM51-25-06-001-001).

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(81) Apply fluid resistant enamel, color grey No.16473, on the bolt (2), the nut (3) and the rivets (4) and (5) (refer to SRM 51-25-16-001-001). (82) Apply fluid resistant enamel on bolts (2), refer to the external paint scheme for the color (refer to SRM 51-25-16-001-001). Refer to Figure 9. (83) Apply aerodynamic sealant between the aft seal (3) and the MLG door (refer to Figure 9, Sheet 2, View E) (refer to SRM 51-23-00-001-001). (84) Apply epoxy primer on the aerodynamic sealant between the aft seal (3) and on the MLG door (refer to SRM51-25-06-001-001). (85) Apply fluid resistant enamel, color grey No.16473, on the aerodynamic sealant between the aft seal (3) and the MLG door (refer to SRM 51-25-16-001-001). (86) Apply fluid resistant enamel on the aerodynamic sealant between the aft seal (3) and the MLG door. Refer to the external paint scheme for the color (refer to SRM 51-25-16-001-001). Refer to Figure 11. (87) With a indelible ink pen or equivalent, identify the forward member of the inboard MLG door (refer to AMM 20-60-13-930-801). NOTE:The identification of the forward member must be done with the MLG door POST-SB number.

MLG DOOR - POST-SB PART NUMBER FORWARD MEMBER - POST-SB PART NUMBER KBA670-10500-26 KBA670-10500-28 KBA670-10500-30 KBA670-10500-36 KBA670-10500-38 KBA670-10500-48

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 88 of 189 Oct 12/2012 Revision E, 13 Nov/2014MLG DOOR - POST-SB PART NUMBER FORWARD MEMBER - POST-SB PART NUMBER KBA670-10500-24 KBA670-10500-32 KBA670-10500-34 KBA670-10500-52 KBA670-10500-54 KBA670-10500-50

(88) If necessary, apply aerodynamic sealant in the area (refer to Figure 11,Sheet 3, View D) and AMM 52-23-00-390-813). (89) If necessary, apply epoxy primer on the aerodynamic sealant on the forward member (refer to SRM51-25-06-001-001). (90) If necessary, apply fluid resistant enamel, color grey No.16473, on the aerodynamic sealant of the forward member (refer to SRM51-25-16-001-001). Refer to Figure 15. (91) Identify the seal retainers (13) and (14) with the applicable part number listed in the table below (refer to AMM 20-60-13-930-801).

PRE-SB PART NUMBER POST-SB PART NUMBER Seal retainer CC670-29245-2 Upper seal retainer (13) KBA670-10500-42 Lower seal retainer (14) KBA670-10500-44 Refer to Figure 17. (92) If removed do the installation of the right inboard MLG door (refer to AMM 32-12-01-400-802).

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(93) Do a clearance check of the right MLG doors (refer to AMM 32-12-01-220-801). NOTE:Use the post service bulletin 670BA-32-040 task to do the clearance check. NOTE:If you cannot get the final steps and gaps to agree with AMM TASK 32-12-01-220-801, AFM CDL # 32---12 (Main Landing Gear Door --- Inboard Door) can be done. This service bulletin can be completed when the requirements of step 2.B.(93) are met. (94) Do the extension of the MLG (refer to AMM 32-12-01-220-801). (95) If it is not possible to complete all the instructions in this service bulletin because of the configuration of the aircraft, speak with a representative of Bombardier Customer Response Centre at phone number 514---855---8500 or send an e-mail at thd.crj@bombardier.com for analysis and to get an approved disposition to complete this service bulletin.

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 90 of 189 Oct 12/2012 Revision E, 13 Nov/2014 F. Job Close-Out (1) Remove all tools, equipment, and unwanted materials from the work area. (2) Install right MLG door-hinge fairing 642AB (refer to AMM 57-80-85-400-802). (3) If removed, install the right MLG wheel bin (refer to AMM 53-83-89-400-801). (4) Remove the tags and close the circuit breakers that follow:

CB PANEL CB NO. NAME CBP-1 A12 HEATERS TAT CBP-1 A13 HEATERS AOA R CBP-1 A14 HEATERS PITOT R CBP-1 C13 ADG HEATER CBP-1 G1 PSEU CH A CBP-1 G2 NOSE STEER CBP-1 G13 HEATERS ADS CONT 2 CBP-1 G14 HEATERS STATIC R CBP-1 LOWER T7 HEATERS PITOT L CBP-1 LOWER T8 HEATERS AOA L CBP-1 LOWER T9 HEATERS PITOT STBY CBP-1 LOWER U7 ENG IGN A CBP-2 G1 PSEU CH B CBP-2 G2 NOSE STEER CBP-2 N6 ADG DEPLOY AUTO CBP-2 N9 MLG BAYOVHT DET CBP-2 P1 PSEU CH A CBP-2 P2 PSEU CH B CBP-2 LOWER S1 HEATERS STATIC L CBP-2 LOWER S2 HEATERS ADS CONT 1

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CB PANEL NAME

CB NO. CBP-2 LOWER S3 HEATERS ADS CONT STBY CBP-5 B10 ENG IGN B
(5) If the wheel bin was removed, do the operational test of the MLG overheat detection and warning system (refer to AMM 26-14-04-710-801). (6) Do the lubrication of the MLG and the MLG door (refer to AMM 12-20-32-640-802). (7) Do the operational test of the landing-gear extension/retraction system (refer to AMM 32-30-00-710-801). (8) Remove the aircraft from jacks (refer to AMM 07-11-01-586-801). (9) Make sure that step 2. B (93) of PART B is completed and meet the requirements before you do the entry in the applicable logbooks. (10) When PART B of this service bulletin is completed, add the weight and balance data shown in paragraph 1.I. of this service bulletin to the Weight and Balance Manual. Under ‘Description of Change’ enter “Service Bulletin 670BA-32-040, Revision E, incorporated.” (11) When PART B of this service bulletin is completed, make this entry in the applicable logbooks: “Service Bulletin 670BA-32-040, Revision E, Landing Gear - Main Landing Gear (MLG) and Doors - Increase the Clearances Between the MLG Fairing and MLG Doors, PART B, incorporated.””

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 92 of 189 Oct 12/2012 Revision E, 13 Nov/2014 PART C --- Installation of the Inboard MLG Door Part Number CC670-10520-15 and Increase of the Clearance Between the Left MLG Inboard-Door and the MLG Fairing G. Job Set-Up Reference Information

REFERENCE DESIGNATION AMM 07-11-01-582-801 Jacking of the Aircraft AMM 07-11-01-586-801 Lowering of the Aircraft AMM 10-11-00-400-801 Installation of the Nose Landing Gear (NLG) Lockpin AMM 10-11-00-400-802 Installation of the Main Landing Gear (MLG) Lockpins AMM 12-00-00-867-801 Standard Aircraft Configuration for Maintenance AMM 12-20-32-640-802 Lubrication of the Main Landing Gear (MLG) AMM 20-21-00-910-801 Torquing of Threaded Fasteners AMM 20-51-00-000-801 Removal of Cotter Pins AMM 20-51-00-000-802 Removal of Lockwire AMM 20-51-00-400-801 Installation of Cotter Pins AMM 20-51-00-400-802 Installation of Lockwire AMM 20-60-13-930-801 Identification of Aircraft Parts and Assemblies AMM 32-12-01-000-802 Removal of the Inboard MLG Doors AMM 32-12-01-220-801 Clearance Check of the MLG Doors AMM 32-12-01-400-802 Installation of the Inboard MLG Doors AMM 32-12-01-820-801 Adjustment of the MLG Doors AMM 32-30-00-710-801 Operational Test of the Landing-Gear Extension/ Retraction System AMM 51-23-00-100-801 Removal of Sealants NDT 51-20-006-250 Eddy Current- Inspection Procedures NDT 51-20-008-230 Liquid Penetrant - Inspection Procedures

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REFERENCE DESIGNATION NDT 51-20-009-210 Visual - Inspection Procedures SRM 51-21-11-001-001 Corrosion Prevention Procedures SRM 51-21-16-001-001 Finish Codes SRM 51-23-00-001-001 Pressure, Environmental, Fuel Tank and Firewall Sealing SRM 51-25-06-001-001 Fluid-Resistant (FR) Epoxy Primer SRM 51-25-16-001-001 Fluid-Resistant (FR) Polyurethane Topcoat SRM 51-25-52-001-001 Composite-Laminate Coatings SRM 51-26-00-001-001 Cleaning SRM 51-40-06-001-001 Fastener Edge Distance and Pitch SRM 51-40-11-001-001 Preparation of Fastener Holes SRM 51-41-02-001-001 Bolts, Screws and Related Items SRM 51-42-06-001-001 Solid Rivets SRM 51-42-21-001-001 Hi-Lite Fasteners SRM 51-71-00-001-001 Typical Structural Repairs SRM 51-75-00-001-001 Graphite Repairs

### SERVICE BULLETIN 670BA---32---040

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Tolerance Information

Linear Tolerances Angular Tolerance X.XX in. (X.X mm) X.X in. (X mm) +/-030” +/- 0.03 in. +/- 0.1 in. +/- 0.8 mm +/- 3 mm NOTE:The tolerances above apply to the dimensions given in this service bulletin, except when specified differently. (1) Make sure that the aircraft is in standard configuration for maintenance (refer to AMM 12-00-00-867-801). WARNING: OBEY ALL THE SAFETY PRECAUTIONS WHEN YOU DO

MAINTENANCE ON OR NEAR ELECTRICAL/ELECTRONIC EQUIPMENT. IF YOU DO NOT OBEY THE SAFETY PRECAUTIONS, INJURIES TO PERSONS AND/OR DAMAGE TO THE EQUIPMENT CAN OCCUR. (2) Open, safety, and tag the circuit breakers that follow:

CB PANEL CB NO. NAME CBP-1 A12 HEATERS TAT CBP-1 A13 HEATERS AOA R CBP-1 A14 HEATERS PITOT R CBP-1 C13 ADG HEATER CBP-1 G1 PSEU CH A CBP-1 G2 NOSE STEER CBP-1 G13 HEATERS ADS CONT 2 CBP-1 G14 HEATERS STATIC R CBP-1 LOWER T7 HEATERS PITOT L CBP-1 LOWER T8 HEATERS AOA L CBP-1 LOWER T9 HEATERS PITOT STBY CBP-1 LOWER U7 ENG IGN A CBP-2 G1 PSEU CH B CBP-2 G2 NOSE STEER

### SERVICE BULLETIN 670BA---32---040

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CB PANEL NAME

CB NO. CBP-2 N6 ADG DEPLOY AUTO CBP-2 N9 MLG BAYOVHT DET CBP-2 P1 PSEU CH A CBP-2 P2 PSEU CH B CBP-2 LOWER S1 HEATERS STATIC L CBP-2 LOWER S2 HEATERS ADS CONT 1 CBP-2 LOWER S3 HEATERS ADS CONT STBY CBP-5 B10 ENG IGN B (3) Put the aircraft on jacks (refer to AMM 07-11-01-582-801). (4) If necessary, remove the left MLG wheel bin (refer to AMM 53-83-89-000-801).

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 96 of 189 Oct 12/2012 Revision E, 13 Nov/2014 H. Procedure For all aircraft Refer to Figure 1. (1) Do a detailed visual inspection of the left section of the MLG fairing as follows (refer to NDT 51-20-009-210): (a) Visually inspect to make sure that the forward and the aft stops are not missing from the MLG fairing. (b) If the forward and/or the aft stops are not missing, visually inspect that there are no loose or missing fasteners from the forward and aft stops. (c) Visually inspect along the edge of the MLG fairing adjacent the MLG door to make sure that there is no damage. Refer to the shaded area (refer to Figure 1, Sheet 2). NOTE:For this inspection, damage does not include surface scratches and/or paint deterioration. (d) Record the findings on the record sheet of Appendix A. Refer to Figure 3. (2) Do a detailed visual inspection of the stops (1) and (2), and the wedge (3) on the left side of the forward and the aft spars as follows (refer to NDT 51-20-009-210): (a) Visually inspect to make sure that the stops (1) and (2) are not missing. (b) If the stops (1) and/or (2) are not missing, visually inspect that there are no loose or missing fasteners from the stops (1) and/or (2). (c) Visually inspect to make sure that the wedge (3) is not missing. (d) If the wedge (3) is not missing, visually inspect that there are no loose or missing fasteners from the wedge (3). (e) Record the findings on the record sheet of Appendix A.

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 97 of 189 Oct 12/2012 Revision E, 13 Nov/2014 Refer to Figures 1 and 3. (3) If damage is found and/or there are missing parts and/or fasteners, speak with a representative of the Customer Response Center (CRC) at phone number 514-855-8500 for a disposition. NOTE:Refer to the record sheet of Appendix A for data. (4) If no damage is found and there is no missing part or fastener, go to the next step. Refer to Figure 6. (5) Remove and discard the aft fairing seal (4) and the aft retainer seal (5) from the fairing as follows:
CAUTION: DURING THE PROCEDURE PROTECT THE WORK AREA AND THE MLG. THIS WILL PREVENT DIRT, CHIPS, OR OTHER UNWANTED MATERIAL TO CAUSE DAMAGE TO THE AIRCRAFT. (a) Remove and discard the three bolts (1), the washers (2) and the nuts (3). (b) Remove and discard the seal aft fairing (4) and the aft retainer seal (5) from the fairing. (6) Remove the aft stop-fitting (14) as follows: (a) Remove the two bolts (6), the washers (10), and the nuts (11). (b) Remove and discard the stop pad (7), the laminated shim (8) and the shim (9). (c) Remove the sealant from the aft stop-fitting (14) and the sealing member (refer to Figure 6, Sheet 1, View D) (refer to AMM 51-23-00-100-801). (d) Remove the three solid rivets (17). (e) Remove and discard the bolts (12) and the nuts (13). (f) Remove the aft stop-fitting (14) from the sealing member. (g) Remove the sealant from the MLG fairing, the sealing member and on the aft stop-fitting (14) (refer to AMM 51-23-00-100-801).

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(7) Drill the aft stop-fitting (14) as follows: (a) Temporarily install the shim fairing (15) on the aft stop-fitting (14). Make sure that the shim fairing (15) is parallel to the edge of the aft stop-fitting (14) (refer to Figure 6, Sheet 2, View E). (b) Attach the shim fairing (15) with the bolt (6), the washer (10) and the nut (11). (c) Backdrill one hole to a diameter of 0.190 to 0.194 in (4.83 to 4.93 mm) from the shim fairing (15) to the aft stop-fitting (14). (d) Remove and discard the nut (11). (e) Remove the bolt (6), the washer (10) and the shim fairing (15). (f) Temporarily install the shim fairing (15) on the laminated shim (16). (g) Increase the diameter of two holes in the shim fairing (15) and the laminated shim (16) to 0.213 to 0.217 (5.41 to 5.51 mm). (h) Disassemble and remove burrs and sharp edges from the holes of the shim fairing (15), the laminated shim (16), and the aft stop-fitting (14). (i) Clean the bare metal surfaces of the aft stop-fitting (14) with clean dry cloths, with no lint, moist with aliphatic naphta or equivalent. (j) Dry the bare surfaces with clean dry cloths with no lint. (k) Apply chemical conversion compound on the bare metal surfaces of the hole in the aft stop-fitting (14) (refer to SRM 51-21-11-001-001). (l) Touch-up the hole in the aft stop-fitting (14) with epoxy primer (refer to SRM 51-25-06-001-001). (m) Touch-up the hole in the aft stop-fitting (14) with fluid resistant enamel color grey #16473 (refer to SRM 51-25-16-001-001). Refer to Figure 7. (8) Remove 0.53 in. to 0.61 in. (13.4 to 15.5 mm) of material from the aft area of the MLG fairing (refer to Figure 7, Sheet1, View D and SRM 51-71-00-001-001). NOTE:An edge distance of 0.57 in (14.50 mm) for the three holes of the aft stop-fitting (1) is necessary. (9) Install the aft stop-fitting (1) as follows: (a) Apply sealant on the mating surface of the aft stop-fitting (1) (refer to SRM 51-23-00-001-001).

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(b) Install the aft stop-fitting (1) on the sealing member of the MLG fairing. (c) Wet-install the two upper rivets (5) on the aft stop-fitting (1) (refer to Figure 7, View C and SRM 51-42-06-001-001 and SRM 51-23-00-001-001). (d) Wet-install one rivet (4) at the bottom of the aft stop-fitting (1) (refer to Figure 7, View C and SRM 51-42-06-001-001 and SRM 51-23-00-001-001). (e) Wet-install the three bolts (2) and the nuts (3) (refer to SRM 51-42-21-001-001 and SRM 51-23-00-001-001). NOTE: The installation of the stop pad (7), the laminated shim (8), and the shim (9) will be incorporated in a subsequent step during the clearance check. Refer to Figure 18. (10) If installed, remove the inboard MLG door (1) (refer to AMM 32-12-01-00-802). For Aircraft 10002 thru 10217, 15002 thru 15043 and 15991 pre-IS Modification Summary IS670528200033 with inboard MLG door CC670-10520-2013, CC670-10520-2015, KCC670-10900-3, KCC670-10900-5
(11) Do IS Modification Summary IS670528200033. NOTE: During the incorporation of the IS Modification Summary IS670528200033, it is not necessary to remove the outboard MLG door. For all aircraft Refer to Figure 10 and 18. (12) Install the left inboard MLG door (2) and adjust the aft attachment of the outboard MLG door and the inboard MLG door as follows: (a) Install the left inboard MLG door (2) (refer to AMM 32-12-01-400-802). NOTE: During the installation of the inboard MLG door (2) refer to the AMM 32-12-01-400-802 post Service Bulletin 670BA-32-040. (b) Apply Aeroshell No.33 grease on the sleeve bushing (4) and the shank of the bolt (1).

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(c) Install the sleeve bushing (4), the washer (10) and the bolt (1). (d) Move the door to the aft position until the the bushing (11) touches the bushing (12). (e) Measure the clearance between the bushings (2) and (3). (f) If the clearance is between 0.062 and 0.093 in. (1.57 to 2.36 mm), install the washer (7). (g) If the clearance is between 0.094 and 0.125 in. (2.39 to 3.18 mm), install the washer (8). NOTE: If the clearance is 0.126 (3.20 mm) or higher, speak with a representative of the Customer Response Center (CRC) at phone number 514-855-8500 for a disposition. (h) Make sure to have a clearance of 0.030 and 0.060 in. (0.76 to 1.42 mm) after the installation of the new washer. (i) Install the washer (5) and the nut (6). (j) Torque the nut (6) (refer to AMM 20-21-00-910-801). (k) Safety the nut (6) with the cotter pin (9) (refer to AMM 20-51-00-400-801). Refer to Figure 12. (13) Before the installation of the wheel bin, record the part number of the MLG fairing. NOTE:The part number will be necessary in a further step for the identification. (14) Install the left MLG wheel bin (refer to AMM 53-83-89-400-801). (15) Identify locations PT2 to PT6 and PT9 to PT13 on the MLG door as follows: NOTE:All PT locations must be identified on the outer skin of the MLG door. NOTE:Make sure that you can see the identification mark-up when the door is in the closed position. (a) With a indelible ink pen, identify the PT2 on the forward edge of the inboard door, at 0.50 in.(12.7 mm) from the outboard edge of the angle, (refer to Figure 12, Sheet 1,View B).

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(b) With a indelible ink pen, identify the PT3 on the forward edge of the inboard door, aligned with the stiffener of the forward member. (c) With a indelible ink pen, identify the PT4 on the forward edge of the inboard door, at 0.50 in.(12.7 mm) from the outboard edge of the inboard door. (d) With a indelible ink pen, identify the PT5 on the forward edge of the outboard door, at 0.50 in.(12.7 mm) from the inboard edge of the outboard door. (e) With a indelible ink pen, identify the PT6 on the forward edge of the outboard door, aligned with the stiffener of the forward member. (f) With a indelible ink pen, identify the PT9 on the aft edge of the outboard door, aligned with the stiffener of the forward member. (g) With a indelible ink pen, identify the PT10 on the aft edge of the outboard door, at 0.50 in (12.7 mm) from the inboard edge of the outboard door. (h) With a indelible ink pen, identify the PT11 on the aft edge of the inboard door, at 2.50 in (63.5 mm) from the outboard edge of the inboard door. (i) With a indelible ink pen, identify the PT12 on the aft edge of the inboard door, aligned with the stiffener of the aft member. (j) With a indelible ink pen, identify the PT13 on the forward edge of the inboard door, at 0.50 in.(12.7 mm) from the outboard edge of the angle. (16) Do the retraction of the main landing gear (refer to AMM 32-30-00-865-801). (17) Identify locations PT1 and PT14 to PT25 on the MLG fairing as follows: (a) With a indelible ink pen, identify the PT1 on the forward edge of the inboard door, at 1.50 in.(38.1 mm) from the end of the fairing seal, (refer to Figure 12, Sheet 2, View E). (b) With a indelible ink pen, identify the PT14 on the aft edge of the fairing, aligned with the screw on the fairing. (c) With a indelible ink pen, identify the PT15 on the aft edge of the inboard door, at 0.50 in (12.7 mm) from the more down edge of the angle, (refer to Figure 12, Sheet 2, View D).

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(d) With a indelible ink pen, identify the PT16 on the aft edge of the inboard door, align with the screw on the fairing. (e) With a indelible ink pen, identify the PT17 on the aft edge of the inboard door, align with the screw on the fairing. (f) With a indelible ink pen, identify the PT18 on the aft edge of the inboard door, align with the screw on the fairing. (g) With a indelible ink pen, identify the PT19 on the aft edge of the inboard door, align with the screw on the fairing. (h) With a indelible ink pen, identify the PT20 on the forward edge of the inboard door, align with the screw on the fairing. (i) With a indelible ink pen, identify the PT21 on the forward edge of the inboard door, align with the screw on the fairing. (j) With a indelible ink pen, identify the PT22 on the forward edge of the inboard door, align with the screw on the fairing. (k) With a indelible ink pen, identify the PT23 on the forward edge of the inboard door, at 0.50 in (12.7 mm) from the edge of the angle. (l) With a indelible ink pen, identify the PT24 on the forward edge of the inboard door, in line with the screw on the fairing. (m) With a indelible ink pen, identify the PT25 on the forward edge of the inboard door, in line with the screw on the fairing. NOTE:At this point do not remove material on the inboard MLG door or on the MLG fairing. Refer to Figure 12. (18) Measure and record the mismatches in Table 1 of Apppendix B. NOTE:At this point do not remove material on the inboard MLG door or on the MLG fairing. (19) Make sure that the mismatches are within the values shown in Table 1 of Appendix B. NOTE:Do not remove the hydraulic test fixture it will be needed in subsequent steps.

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(20) If the mismatches at PT 22 and PT 23 are not within -0.050 to +0.100 in. (-1.27 to +2.54 mm), speak with a representative of the Customer Response Center (CRC) at phone number 514-855-8500 for a disposition. (21) If the mismatched values recorded in Table 1 of Appendix B are not within the permitted values, do the adjustment of the MLG doors (refer to AMM 32-12-01-820-801). (22) If the adjustment of the MLG doors procedure cannot be done with the AMM task, speak with a representative of the Customer Response Center (CRC) at phone number 514-855-8500 for a disposition (refer to AMM 32-12-01-820-801). (23) If the mismatched values recorded in Table 1 of Appendix B are within the permitted values, record the clearances in Table 2 of Appendix B. (24) If the recorded clearance values are higher than the acceptable clearance values given in Table 2 of Appendix B, speak with a representative of the Customer Response Center (CRC) at phone number 514-855-8500 for a disposition (refer to AMM 32-12-01-820-801). Refer to Figure 17. (25) Record in Table 3 of Appendix B the overlap between the aft stop-fitting (1) and the MLG door stop fitting (refer to Figure 17, View C-C). (26) Do the extension of the main landing gear (refer to AMM 32-30-00-992-801). NOTE:Do not remove the hydraulic test fixture it will be needed in subsequent steps. Refer to Figure 6 and Figure 17. (27) Remove material from the aft stop-fitting (14) as follows: NOTE:The overlap between the aft stop-fitting (14) and the MLG door stop fitting is recorded in Appendix B Table 3 (refer to Figure 17, Sheet 1, View C-C). (a) Remove material from the aft stop-fitting (14) to have a minimum overlap of 0.600 in. (15.24 mm) between the aft stop-fitting and the MLG door stop fitting (refer to Figure 6, Sheet 2, View E). NOTE:The aft stop fitting must be cut as close as possible to the stop pad.

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(b) Remove burrs and break sharp edges on the aft stop-fitting (14). (c) Do a radius of 0.250 in. (6.35 mm) on the aft stop-fitting (14) (refer to Figure 6, Sheet 2, View E). (d) Clean the bare surfaces of the aft stop-fitting (14) with clean dry cloths, with no lint, moist with aliphatic naphta or equivalent. (e) Dry the bare surfaces with clean dry cloths with no lint. Refer to Figure 13. (28) If necessary, remove the left MLG wheel bin (refer to AMM 53-83-89-000-801). (29) Remove of the seals (8), (10), (4), (11), and the seal retainers (5), (7), (9) as follows: (a) Remove the bolts (1), (6), (12), and the washers (3). (b) Remove and discard the nuts (2). (c) Remove the seal retainers (5), (7) and (9). (d) Remove the seals (8) and (11). (e) Remove and discard the seal (4) and (10). Refer to Figure 12 and 14. (30) Remove material from the outboard MLG door and the MLG fairing as follows (refer to SRM 51-75-00-001-001): CAUTION: DURING THE PROCEDURE PROTECT THE WORK AREA AND THE MLG. THIS WILL PREVENT DIRT, CHIPS, OR OTHER UNWANTED MATERIAL TO CAUSE DAMAGE TO THE AIRCRAFT. (a) Calculate the difference between the acceptable clearance values and the actual clearance values recorded in Table 2 of Appendix B. NOTE: The removal of the material must be done only on the MLG fairing and on the outboard MLG door. (b) On the upper forward section of the MLG fairing, between PTA and PTB, remove material up to a maximum of 0.23 in. (5.8 mm) (refer to Figure 14, Sheet 1, View C) (refer to SRM 51-75-00-001-001). Make sure that there is a minimum edge distance of 0.42 in (10.7 mm) from the fasteners.

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(c) On the forward lower section of the MLG fairing between PT B and PT C, remove material to a maximum of 0.16 in. (4.1 mm) (refer to Figure 14, Sheet 1, View D) (refer to SRM 51-75-00-001-001). Make sure that there is a minimum edge distance of 0.57 in (14.5 mm) from the fasteners. (d) On the aft section of the MLG fairing between PT D and PT E, remove the material to a maximum of 0.10 in. (2.5 mm) (refer to Figure 14, Sheet 1, View C) (refer to SRM 51-75-00-001-001). Make sure that there is a minimum edge distance of 0.42 in. (10.7 mm) with the fasteners. (e) On the aft section of the MLG fairing between PT E and PT F, remove the material to a maximum of 0.10 in. (2.5 mm) (refer to Figure 14, Sheet 1, View C) (refer to SRM 51-75-00-001-001). Make sure that there is a minimum edge distance of 0.57 in. (14.5 mm) with the fasteners. Refer to Figure 6. (31) Do a liquid penetrant inspection or an eddy current inspection of the aft stop-fitting (14) as follows: (a) Do a liquid penetrant inspection or an eddy current inspection on the cut section of the aft stop-fitting (14) (refer to Figure 6, Sheet 2, View E, NDT 51-20-008-230, or NDT 51-20-006-250) (b) If there is no crack on the aft stop-fitting (14) go to next step. (c) If there is a crack on the cut section of the aft stop-fitting (14), speak with a representative of the Customer Response Center (CRC) at phone number 514-855-8500 for a disposition. (32) If there is no crack on the aft stop-fitting (14) do the steps that follow: (a) Apply chemical conversion compound or equivalent on the bare surfaces of the aft stop-fitting (14), (refer to SRM 51-21-11-001-001). (b) Apply epoxy primer on the bare surfaces and the hole of the aft stop-fitting (14) (refer to SRM 51-25-06-001-001). (c) Apply fluid resistant enamel color grey #16473 on the aft stop-fitting (14) (refer to SRM 51-25-16-001-001).

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 106 of 189 Oct 12/2012 Revision E, 13 Nov/2014 Refer to Figure 15. For aircraft that have not had the forward fairing seal (11) incorporated with Service Bulletin 670BA-32-030 (33) Install the forward fairing seal (11), the upper seal retainer (13), the lower seal retainer (14) and the fairing safety-guide (12) as follows: (a) Temporary install and secure the fairing forward seal (11) and the retainer seal (5) on the MLG fairing (refer to Figure 15, Sheet 1, View B) (pre-mod). (b) Backdrill the holes from the MLG fairing through the fairing forward seal (11) to a diameter of 0.165 to 0.169 in. (4.19 to 4.29 mm). (c) Remove the fairing forward seal (11) and the seal retainer (5). (d) Remove the burrs from the forward seal (11). For aircraft that had the forward fairing seal (11) incorporated with Service Bulletin 670BA-32-030 (34) Do a detail inspection on the fairing forward seal (11) for signs of cuts or damages in the material base. NOTE:For the MLG fairing seal (11) exterior low friction polyester fabric is not part of the base rubber material rejection criteria. For all aircraft (35) Temporary install and secure the aft fairing seal (10) to the seal retainer (9) (refer to Figure 15, Sheet 2, View D). (a) Backdrill the holes from the seal retainer (9) through the aft fairing seal (10) to a diameter of 0.165 to 0.169 in. (4.19 to 4.29 mm). (b) Remove the aft fairing seal (10) and the seal retainer (9). (c) Remove the burrs from the aft fairing seal (10). (36) Temporary install and secure the fairing forward seal (11), the seal retainer (5) and the fairing safety-guide (12) on the MLG fairing (refer to Figure 15, Sheet 1, View B, pre-mod). (a) Make the upper seal retainer (13) and lower seal retainer (14) from the seal retainer (5) as follows:

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1 Make a line on the seal retainer (5) at the two ends of the fairing safety-guide (12) (refer to Figure 15, Sheet 1, View B, (Pre-Mod). NOTE:The maximum and the minimum clearance between the seal retainer (5) and the fairing safety-guide (12) is 0.13 to 0.07 in. (2.54 to 1.78 mm). 2 Remove the fairing safety-guide (12), the seal retainer (5) and the fairing forward-seal (11).
3 Make sure that there is a minimum edge distance of 0.39 in. (9.9 mm) at the two ends of the seal retainer (5).
4 Cut the seal retainer (5) at the cutting line (refer to SRM 51-71-00-001-001).
5 Do a radius of 0.25 in (6.3 mm) on the upper and lower seals (refer to Figure 15, Sheet 1, View B, pre-Mod).
6 Temporarily identify the two seal retainers as follows:

a Identify the upper seal retainer as item (13).
b Identify the lower seal retainer as item (14).

c Discard the middle part of the seal retainer (5). (37) Temporary install and secure the fairing forward seal (11), the upper seal retainer (13), the lower seal retainer (14), and the fairing safety-guide (12) on the MLG fairing. (38) Make sure that there is a minimum of 0.03 in. (0.76 mm) protrusion with the fairing safety-guide (12) and the edge of the MLG fairing (refer to Figure 15, Sheet 1, View C-C). (39) Make sure that the distance between the fastener hole of the fairing safety-guide (12) and the rebate of the MLG fairing is at minimum of 0.340 in. (1.8 mm). (40) Drill two holes from the pilot holes of the fairing safety-guide (12) through the fairing forward seal (11) and the forward fairing to a diameter of 0.097 to 0.100 (2.46 to 2.54 mm).

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(41) Increase the diameter of the two holes from the pilot holes of the fairing safety-guide (12) through the fairing forward seal (11) and the forward fairing to 0.165 to 0.169 in. (4.19 to 4.29 mm). (42) Backdrill four holes from the MLG fairing through the fairing forward seal (11) and the fairing safety-guide (12) to a diameter of 0.165 to 0.169 in. (4.19 to 4.29 mm). (43) Do a countersink of the two new holes in the MLG fairing to a diameter of 0.331 to 0.342 in. (8.41 to 8.69 mm) for the two bolts (1), (refer to Sheet 1, View B). (44) Remove the fairing safety-guide (12), the upper seal retainer (13), the lower seal retainer (14), and the fairing forward seal (11). (45) Remove burrs from the fairing safety-guide (12), the fairing forward seal (11) and the MLG fairing. (46) Clean the fairing forward seal (11) and the fairing safety-guide (12), the upper seal retainer (13), the lower seal retainer (14) and the MLG fairing with clean, dry cloths with no lint, moist with aliphatic naphta or equivalent. (47) Dry the outer fairing forward-seal (11) and the fairing safety-guide (12), the upper seal retainer (13), the lower seal retainer (14) and the MLG fairing with clean, dry cloths with no lint. (48) Apply chemical conversion compound or equivalent on the bare metal surfaces of the upper seal retainer (13), the lower seal retainer (14) and the fairing safety-guide (12) (refer to SRM 51-21-11-001-001). (49) Apply epoxy primer on the bare surfaces of the upper seal retainer (13), the lower seal retainer (14) and the fairing safety-guide (12) (refer to SRM 51-25-06-001-001). (50) Apply fluid resistant enamel, color grey No.16473, on the upper seal retainer (13), the lower seal retainer (14) and the fairing safety-guide (12) (refer to SRM 51-25-16-001-001). (51) Apply composite-laminate coating on the bare surfaces of the MLG fairing (refer to SRM 51-25-52-001-001). (52) Apply epoxy primer in the countersunk holes of the MLG fairing and on the bare surfaces (refer to SRM 51-23-00-001-001).

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(53) Install the fairing forward seal (11), the fairing safety-guide (12), the upper seal retainer (13) and the lower seal retainer (14) as follows: (a) Install and secure the fairing forward seal (11), the fairing safety-guide (12), the upper seal retainer (13) and the lower seal retainer (14) on the MLG fairing. (b) With sealant, install the bolt (15) through the MLG fairing and the MLG faIring seal (refer to SRM 51-41-02-001-001). (c) Wet-install the bolts (1) through the MLG fairing with the washers (3) and the nuts (2) (refer to Figure 15, Sheet 1, View B) (refer to SRM 51-41-02-001-001). (d) Torque the nuts (2) and the screw (15) (refer to AMM 20-21-00-910-801). (54) Install the seal (7) and the seal retainer (8) as follows: (a) Clean the seal retainer (7), the seal (8) and the aft area of the MLG with clean, dry cloths with no lint moist with aliphatic naphta or equivalent. (b) With sealant, install the bolts (1) through the MLG fairing, the seal (8), the seal retainer (7), the washers (3) and the nuts (2) (refer to SRM 51-23-00-390-810). (c) Torque the nuts (2) (refer to AMM 20-21-00-910-801). (55) Installation of the seal (10) and the seal retainer (9) as follows: (a) Clean the seal retainer (9), the seal (10) and the aft area of the MLG with clean, dry cloths with no lint moist with aliphatic naphta or equivalent. (b) With sealant, install the bolts (6) through the MLG fairing, the seal (10), the seal retainer (9), the washers (3) and the nuts (2) (refer to SRM 51-23-00-001-001). (c) Torque the nuts (2) (refer to AMM 20-21-00-910-801). (d) Clean the area of the forward and the aft MLG fairing with clean, dry cloths with no lint, moist with aliphatic naphta or equivalent. (e) Dry the area with clean, dry cloths with no lint.

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 110 of 189 Oct 12/2012 Revision E, 13 Nov/2014 Refer to Figure 7. (56) With an indelible ink pen or equivalent, identify the aft stop-fitting (1) of the MLG fairing as shown in the table below (refer to AMM 20-60-13-930-801).

PRE-SB PART NUMBER POST-SB PART NUMBER CC670-39076-1 KBA670-10500-39 (57) If only PART C is done, with a indelible ink pen or equivalent, identify the left MLG fairing with the applicable part number listed in the table below (refer to AMM 20-60-13-930-801).

PRE-SB PART NUMBER POST-SB PART NUMBER BA670-00001-2085 KBA670-10500-300 CC670-39005-951 KBA670-10500-500 CC670-39005-3 KBA670-10500-700 CC670-39005-5 KBA670-10500-130 CC670-39019-49 KBA670-10500-190 CC670-39019-963 KBA670-10500-150 CC670-39019-965 KBA670-10500-170 CC670-39019-51 KBA670-10500-210 KBA670-39005-3 KBA670-10500-610 KBA670-39005-5 KBA670-10500-630 KBA670-39005-7 KBA670-10500-650 KBA670-39005-9 KBA670-10500-670

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(58) If PART C and PART D are done or PART B and PART C are done, with a indelible ink pen or equivalent, identify the MLG fairing assembly with the applicable part number listed in the table below (refer to AMM 20-60-13-930-801).

PRE-SB PART NUMBER POST-SB PART NUMBER BA670-00001-2085 KBA670-10500-3 CC670-39005-951 KBA670-10500-5 CC670-39005-3 KBA670-10500-7 CC670-39005-5 KBA670-10500-13 CC670-39019-49 KBA670-10500-19 CC670-39019-963 KBA670-10500-15 CC670-39019-965 KBA670-10500-17 CC670-39019-51 KBA670-10500-21 KBA670-39005-3 KBA670-10500-61 KBA670-39005-5 KBA670-10500-63 KBA670-39005-7 KBA670-10500-65 KBA670-39005-9 KBA670-10500-67 (59) Apply a bead of sealant on the aft stop-fitting (1) and the sealing member (refer to Figure 7, Sheet 2, View C) (refer to SRM 51-23-00-001-001). (60) Apply epoxy primer on the rivets (4) and (5), bolts (2) and nuts (3). (refer to SRM51-25-06-001-001). (61) Apply fluid resistant enamel, color grey No.16473, on the bolt (2), the nut (3) and the rivets (4) and (5) (refer to SRM 51-25-16-001-001). (62) Apply fluid resistant enamel on the bolts (2). Refer to the external paint scheme for the color (refer to SRM 51-25-16-001-001).

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 112 of 189 Oct 12/2012 Revision E, 13 Nov/2014 Refer to Figure 15. (63) Identify the seal retainers (13) and (14) with the applicable part number listed in the table below (refer to AMM 20-60-13-930-801).

PRE-SB PART NUMBER POST-SB PART NUMBER Seal retainer CC670-39245-1 Upper seal retainer KBA670-10500-41 Lower seal retainer KBA670-10500-43 Refer to Figure 17. (64) Do a clearance check of the left MLG doors (refer to AMM 32-12-01-220-801). NOTE:Use the post-Service Bulletin 670BA-32-040 task to do the clearance check. (65) Do the extension of the MLG (refer to AMM 32-12-01-220-801). (66) If it is not possible to complete all the instructions in this service bulletin because of the configuration of the aircraft, speak with a representative of Bombardier Customer Response Centre at phone number 514-855-8500 or send an e-mail at thd.crj@bombardier.com for analysis and to get an approved disposition to complete this service bulletin.

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 113 of 189 Oct 12/2012 Revision E, 13 Nov/2014 I. Job Close-Out (1) Remove all tools, equipment, and unwanted materials from the work area. (2) If removed, install the left MLG wheel bin (refer to AMM 53-83-89-400-801). (3) Remove the tags and close the circuit breakers that follow:

CB PANEL CB NO. NAME CBP-1 A12 HEATERS TAT CBP-1 A13 HEATERS AOA R CBP-1 A14 HEATERS PITOT R CBP-1 C13 ADG HEATER CBP-1 G1 PSEU CH A CBP-1 G2 NOSE STEER CBP-1 G13 HEATERS ADS CONT 2 CBP-1 G14 HEATERS STATIC R CBP-1 LOWER T7 HEATERS PITOT L CBP-1 LOWER T8 HEATERS AOA L CBP-1 LOWER T9 HEATERS PITOT STBY CBP-1 LOWER U7 ENG IGN A CBP-2 G1 PSEU CH B CBP-2 G2 NOSE STEER CBP-2 N6 ADG DEPLOY AUTO CBP-2 N9 MLG BAYOVHT DET CBP-2 P1 PSEU CH A CBP-2 P2 PSEU CH B CBP-2 LOWER S1 HEATERS STATIC L CBP-2 LOWER S2 HEATERS ADS CONT 1 CBP-2 LOWER S3 HEATERS ADS CONT STBY

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CB PANEL NAME

CB NO. CBP-5 B10 ENG IGN B
(4) If the left wheel bin was removed, do the operational test of the MLG overheat detection and warning system (refer to AMM 26-14-04-710-801). (5) Do the lubrication of the MLG and the MLG door (refer to AMM 12-20-32-640-802). (6) Do the operational test of the landing-gear extension/retraction system (refer to AMM 32-30-00-710-801). (7) Remove the aircraft from jacks (refer to AMM 07-11-01-586-801). (8) Make sure that step 2. B (64) of PART C is completed and meet the requirements before you do the entry in the applicable logbooks. (9) When PART C of this service bulletin is completed, add the weight and balance data shown in paragraph 1.I. of this service bulletin to the Weight and Balance Manual. Under ‘Description of Change’ enter “Service Bulletin 670BA-32-040 PART C, Revision E, incorporated.” (10) When PART C of this service bulletin is completed, make this entry in the applicable logbooks: “Service Bulletin 670BA-32-040, Revision E, Landing Gear - Main Landing Gear (MLG) and Doors - Increase the Clearances Between the MLG Fairing and the MLG Doors, PART C , incorporated.”

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 115 of 189 Oct 12/2012 Revision E, 13 Nov/2014 PART D --- Installation of the Inboard MLG Door Part Number CC670-10520-16 and Increase of the Clearance Between the Right MLG Inboard-Door and the MLG Fairing J. Job Set-Up Reference Information

REFERENCE DESIGNATION AMM 07-11-01-582-801 Jacking of the Aircraft AMM 07-11-01-586-801 Lowering of the Aircraft AMM 10-11-00-400-801 Installation of the Nose Landing Gear (NLG) Lockpin AMM 10-11-00-400-802 Installation of the Main Landing Gear (MLG) Lockpins AMM 12-00-00-867-801 Standard Aircraft Configuration for Maintenance AMM 12-20-32-640-802 Lubrication of the Main Landing Gear (MLG) AMM 20-21-00-910-801 Torquing of Threaded Fasteners AMM 20-51-00-000-801 Removal of Cotter Pins AMM 20-51-00-000-802 Removal of Lockwire AMM 20-51-00-400-801 Installation of Cotter Pins AMM 20-51-00-400-802 Installation of Lockwire AMM 20-60-13-930-801 Identification of Aircraft Parts and Assemblies AMM 32-12-01-000-802 Removal of the Inboard MLG Doors AMM 32-12-01-220-801 Clearance Check of the MLG Doors AMM 32-12-01-400-802 Installation of the Inboard MLG Doors AMM 32-12-01-820-801 Adjustment of the MLG Doors AMM 32-30-00-710-801 Operational Test of the Landing-Gear Extension/ Retraction System AMM 51-23-00-100-801 Removal of Sealants NDT 51-20-006-250 Eddy Current - Inspection Procedures NDT 51-20-008-230 Liquid Penetrant - Inspection Procedures

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REFERENCE DESIGNATION NDT 51-20-009-210 Visual - Inspection Procedures SRM 51-21-11-001-001 Corrosion Prevention Procedures SRM 51-21-16-001-001 Finish Codes SRM 51-23-00-001-001 Pressure, Environmental, Fuel Tank and Firewall Sealing SRM 51-25-06-001-001 Fluid-Resistant (FR) Epoxy Primer SRM 51-25-16-001-001 Fluid-Resistant (FR) Polyurethane Topcoat SRM 51-25-52-001-001 Composite-Laminate Coatings SRM 51-26-00-001-001 Cleaning SRM 51-40-06-001-001 Fastener Edge Distance and Pitch SRM 51-40-11-001-001 Preparation of Fastener Holes SRM 51-41-02-001-001 Bolts, Screws and Related Items SRM 51-42-06-001-001 Solid Rivets SRM 51-42-21-001-001 Hi-Lite Fasteners SRM 51-71-00-001-001 Typical Structural Repairs SRM 51-75-00-001-001 Graphite Repairs

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Tolerance Information

Linear Tolerances Angular Tolerance X.XX in. (X.X mm) X.X in. (X mm) +/-030” +/- 0.03 in. +/- 0.1 in. +/- 0.8 mm +/- 3 mm NOTE:The tolerances above apply to the dimensions given in this service bulletin, except when specified differently. (1) Make sure that the aircraft is in standard configuration for maintenance (refer to AMM 12-00-00-867-801). WARNING: OBEY ALL THE SAFETY PRECAUTIONS WHEN YOU DO

MAINTENANCE ON OR NEAR ELECTRICAL/ELECTRONIC EQUIPMENT. IF YOU DO NOT OBEY THE SAFETY PRECAUTIONS, INJURIES TO PERSONS AND/OR DAMAGE TO THE EQUIPMENT CAN OCCUR. (2) Open, safety, and tag the circuit breakers that follow:

CB PANEL CB NO. NAME CBP-1 A12 HEATERS TAT CBP-1 A13 HEATERS AOA R CBP-1 A14 HEATERS PITOT R CBP-1 C13 ADG HEATER CBP-1 G1 PSEU CH A CBP-1 G2 NOSE STEER CBP-1 G13 HEATERS ADS CONT 2 CBP-1 G14 HEATERS STATIC R CBP-1 LOWER T7 HEATERS PITOT L CBP-1 LOWER T8 HEATERS AOA L CBP-1 LOWER T9 HEATERS PITOT STBY CBP-1 LOWER U7 ENG IGN A CBP-2 G1 PSEU CH B CBP-2 G2 NOSE STEER

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CB PANEL NAME

CB NO. CBP-2 N6 ADG DEPLOY AUTO CBP-2 N9 MLG BAYOVHT DET CBP-2 P1 PSEU CH A CBP-2 P2 PSEU CH B CBP-2 LOWER S1 HEATERS STATIC L CBP-2 LOWER S2 HEATERS ADS CONT 1 CBP-2 LOWER S3 HEATERS ADS CONT STBY CBP-5 B10 ENG IGN B (3) Put the aircraft on jacks (refer to AMM 07-11-01-582-801). (4) If necessary, remove the right MLG wheel bin (refer to AMM 53-83-89-000-801).

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 119 of 189 Oct 12/2012 Revision E, 13 Nov/2014 K. Procedure For all aircraft Refer to Figure 1. (1) Do a detailed visual inspection of the right section of the MLG fairing as follows (refer to NDT 51-20-009-210): (a) Visually inspect to make sure that the forward and the aft stops are not missing from the MLG fairing. (b) If the forward and/or the aft stops are not missing, visually inspect that there are no loose or missing fasteners from the forward and aft stops. (c) Visually inspect along the edge of the MLG fairing adjacent the MLG door to make sure that there is no damage. Refer to the shaded area (refer to Figure 1, Sheet 2). NOTE:For this inspection, damage does not include surface scratches and/or paint deterioration. (d) Record the findings on the record sheet in Appendix A. Refer to Figure 3. (2) Do a detailed visual inspection of the stops (1) and (2), and the wedge (3) on the right side of the forward and the aft spars as follows (refer to NDT 51-20-009-210): (a) Visually inspect to make sure that the stops (1) and (2) are not missing. (b) If the stops (1) and/or (2) are not missing, visually inspect that there are no loose or missing fasteners from the stops (1) and/or (2). (c) Visually inspect to make sure that the wedge (3) is not missing. (d) If the wedge (3) is not missing, visually inspect that there are no loose or missing fasteners from the wedge (3). (e) Record the findings on the record sheet of Appendix A.

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 120 of 189 Oct 12/2012 Revision E, 13 Nov/2014 Refer to Figure 1 and 3. (3) If damage is found and/or there are missing parts and/or fasteners, speak with a representative of the Customer Response Center (CRC) at phone number 514-855-8500 for a disposition. NOTE:Refer to the record sheet of Appendix A for data. (4) If no damage is found and there is no missing part or fastener, go to the next step. Refer to Figure 6. (5) Remove and discard the aft fairing seal (4) and the aft retainer seal (5) from the fairing as follows:
CAUTION: DURING THE PROCEDURE PROTECT THE WORK AREA AND THE MLG. THIS WILL PREVENT DIRT, CHIPS, OR OTHER UNWANTED MATERIAL TO CAUSE DAMAGE TO THE AIRCRAFT. (a) Remove and discard the three bolts (1), the washers (2), and the nuts (3). (b) Remove and discard the seal aft fairing (4) and the aft retainer seal (5) from the fairing. (6) Remove the aft stop-fitting (14) as follows: (a) Remove the two bolts (6), the washers (10), and the nuts (11). (b) Remove and discard the stop pad (7), the laminated shim (8), and the shim (9). (c) Remove the sealant from the aft stop-fitting (14) and the sealing member (refer to Figure 6, Sheet 1, View D) (refer to AMM 51-23-00-100-801). (d) Remove the three solid rivets (17). (e) Remove and discard the bolts (12) and the nuts (13). (f) Remove the aft stop-fitting (14) from the sealing member. (g) Remove the sealant from the MLG fairing, the sealing member and on the aft stop-fitting (14) (refer to AMM 51-23-00-100-801).

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(7) Drill the aft stop-fitting (14) as follows: (a) Temporarily install the shim fairing (15) on the aft stop-fitting (14). Make sure that the shim fairing (15) is parallel to the edge of the aft stop-fitting (14) (refer to Figure 6, Sheet 2, View E). (b) Attach the shim fairing (15) with the bolt (6), the washer (10), and the nut (11). (c) Backdrill one hole to a diameter of 0.190 to 0.194 in (4.83 to 4.93 mm) from the shim fairing (15) to the aft stop-fitting (14). (d) Remove and discard the nut (11). (e) Remove the bolt (6), the washer (10), and the shim fairing (15). (f) Temporarily install the shim fairing (15) on the laminated shim (16). (g) Increase the diameter of two holes in the shim fairing (15) and the laminated shim (16) to 0.213 to 0.217 (5.41 to 5.51 mm). (h) Disassemble and remove burrs and sharp edges from the holes of the shim fairing (15), the laminated shim (16), and the aft stop-fitting (14). (i) Clean the bare metal surfaces of the aft stop-fitting (14) with clean dry cloths, with no lint, moist with aliphatic naphta or equivalent. (j) Dry the bare surfaces with clean dry cloths with no lint. (k) Apply chemical conversion compound on the bare metal surfaces of the hole in the aft stop-fitting (14) (refer to SRM 51-21-11-001-001). (l) Touch-up the hole in the aft stop-fitting (14) with epoxy primer (refer to SRM 51-25-06-001-001). (m) Touch-up the hole in the aft stop-fitting (14) with fluid resistant enamel color grey #16473 (refer to SRM 51-25-16-001-001). Refer to Figure 7. (8) Remove 0.53 in. to 0.61 in. (13.4 to 15.5 mm) of material from the aft area of the MLG fairing (refer to Figure 7, Sheet1, View D and SRM 51-71-00-001-001). NOTE:An edge distance of 0.57 in (14.50 mm) for the three holes of the aft stop-fitting (1) is necessary. (9) Install the aft stop-fitting (1) as follows: (a) Apply sealant on the mating surface of the aft stop-fitting (1) (refer to SRM 51-23-00-001-001).

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(b) Install the aft stop-fitting (1) on the sealing member of the MLG fairing. (c) Wet-install the two upper rivets (5) on the aft stop-fitting (1) (refer to Figure 7, View C and SRM 51-42-06-001-001 and SRM 51-23-00-001-001). (d) Wet-install one rivet (4) at the bottom of the aft stop-fitting (1) (refer to Figure 7, View C and SRM 51-42-06-001-001 and SRM 51-23-00-001-001). (e) Wet-install the three bolts (2) and the nuts (3) (refer to SRM 51-42-21-001-001 and SRM 51-23-00-001-001). NOTE: The installation of the stop pad (7), the laminated shim (8), and the shim (9) will be incorporated in a subsequent step during the clearance check. Refer to Figure 18. (10) If installed, remove the inboard MLG door (1) (refer to AMM 32-12-01-00-802). For Aircraft 10002 thru 10217, 15002 thru 15043 and 15991 pre-IS Modification Summary IS670528200033 with inboard MLG door CC670-10520-2014, CC670-10520-2016, KCC670-10900-4, KCC670-10900-6
(11) Do IS Modification Summary IS670528200033. NOTE: During the incorporation of the IS Modification Summary IS670528200033, it is not necessary to remove the outboard MLG door. For all aircraft Refer to Figure 10 and 18. (12) Install the right inboard MLG door (2) and adjust the aft attachment of the outboard MLG door and the inboard MLG door as follows: (a) Install the right inboard MLG door (2) (refer to AMM 32-12-01-400-802). NOTE: During the installation of the inboard MLG door (2) refer to AMM 32-12-01-400-802 post-Service Bulletin 670BA-32-040. (b) Apply Aeroshell No.33 grease on the sleeve bushing (4) and the shank of the bolt (1).

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(c) Install the sleeve bushing (4), the washer (10) and the bolt (1). (d) Move the door to the aft position until the the bushing (11) touches the bushing (12). (e) Measure the clearance between the bushings (2) and (3). (f) If the clearance is between 0.062 and 0.093 in. (1.57 to 2.36 mm), install the washer (7). (g) If the clearance is between 0.094 and 0.125 in. (2.39 to 3.18 mm), install the washer (8). NOTE: If the clearance is 0.126 (3.20 mm) or higher, speak with a representative of the Customer Response Center (CRC) at phone number 514-855-8500 for a disposition. (h) Make sure that there is a clearance of 0.030 and 0.060 in. (0.76 to 1.42 mm) after the installation of the new washer. (i) Install the washer (5) and the nut (6). (j) Torque the nut (6) (refer to AMM 20-21-00-910-801). (k) Safety the nut (6) with the cotter pin (9) (refer to AMM 20-51-00-400-801). Refer to Figure 12. (13) Before the installation of the wheel bin, record the part number of the MLG fairing. NOTE: The part number will be necessary in a subsequent step for the identification. (14) Install the right MLG wheel bin (refer to AMM 53-83-89-400-801). (15) Identify locations PT2 to PT6 and PT9 to PT13 on the MLG door as follows: NOTE:All PT locations must be identified on the outer skin of the MLG door. NOTE:Make sure that you can see the identification mark-up when the door is in the closed position. (a) With a indelible ink pen, identify the PT2 on the forward edge of the inboard door, at 0.50 in.(12.7 mm) from the outboard edge of the angle, (refer to Figure 12, Sheet 1,View B).

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(b) With a indelible ink pen, identify the PT3 on the forward edge of the inboard door, aligned with the stiffener of the forward member. (c) With a indelible ink pen, identify the PT4 on the forward edge of the inboard door, at 0.50 in.(12.7 mm) from the outboard edge of the inboard door. (d) With a indelible ink pen, identify the PT5 on the forward edge of the outboard door, at 0.50 in.(12.7 mm) from the inboard edge of the outboard door. (e) With a indelible ink pen, identify the PT6 on the forward edge of the outboard door, aligned with the stiffener of the forward member. (f) With a indelible ink pen, identify the PT9 on the aft edge of the outboard door, aligned with the stiffener of the forward member. (g) With a indelible ink pen, identify the PT10 on the aft edge of the outboard door, at 0.50 in (12.7 mm) from the inboard edge of the outboard door. (h) With a indelible ink pen, identify the PT11 on the aft edge of the inboard door, at 2.50 in (63.5 mm) from the outboard edge of the inboard door. (i) With a indelible ink pen, identify the PT12 on the aft edge of the inboard door, aligned with the stiffener of the aft member. (j) With a indelible ink pen, identify the PT13 on the forward edge of the inboard door, at 0.50 in.(12.7 mm) from the outboard edge of the angle. (16) Do the retraction of the main landing gear (refer to AMM 32-30-00-865-801). (17) Identify locations PT1 and PT14 to PT25 on the MLG fairing as follows: (a) With a indelible ink pen, identify the PT1 on the forward edge of the inboard door, at 1.50 in.(38.1 mm) from the end of the fairing seal, (refer to Figure 12, Sheet 2, View E). (b) With a indelible ink pen, identify the PT14 on the aft edge of the fairing, aligned with the screw on the fairing.

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(c) With a indelible ink pen, identify the PT15 on the aft edge of the inboard door, at 0.50 in (12.7 mm) from the more down edge of the angle, (refer to Figure 12, Sheet 2, View D). (d) With a indelible ink pen, identify the PT16 on the aft edge of the inboard door, align with the screw on the fairing. (e) With a indelible ink pen, identify the PT17 on the aft edge of the inboard door, align with the screw on the fairing. (f) With a indelible ink pen, identify the PT18 on the aft edge of the inboard door, align with the screw on the fairing. (g) With a indelible ink pen, identify the PT19 on the aft edge of the inboard door, align with the screw on the fairing. (h) With a indelible ink pen, identify the PT20 on the forward edge of the inboard door, align with the screw on the fairing. (i) With a indelible ink pen, identify the PT21 on the forward edge of the inboard door, align with the screw on the fairing. (j) With a indelible ink pen, identify the PT22 on the forward edge of the inboard door, align with the screw on the fairing. (k) With a indelible ink pen, identify the PT23 on the forward edge of the inboard door, at 0.50 in (12.7 mm) from the edge of the angle. (l) With a indelible ink pen, identify the PT24 on the forward edge of the inboard door, in line with the screw on the fairing. (m) With a indelible ink pen, identify the PT25 on the forward edge of the inboard door, in line with the screw on the fairing. NOTE:At this point do not remove material on the inboard MLG door or on the MLG fairing.

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 126 of 189 Oct 12/2012 Revision E, 13 Nov/2014 Refer to Figure 12. (18) Measure and record the mismatches in Table 1 of Apppendix B. NOTE:At this point do not remove material on the inboard MLG door or on the MLG fairing. (19) Make sure that the mismatches are within the values shown in Table 1 of Appendix B. NOTE:Do not remove the hydraulic test fixture it will be needed in subsequent steps. (20) If the mismatches at PT 22 and PT 23 are not within -0.050 to +0.100 in. (-1.27 to +2.54 mm), speak with a representative of the Customer Response Center (CRC) at phone number 514-855-8500 for a disposition. (21) If the mismatched values recorded in Table 1 of Appendix B are not within the permitted values, do the adjustment of the MLG doors (refer to AMM 32-12-01-820-801). (22) If the adjustment of the MLG doors procedure cannot be done with the AMM task, speak with a representative of the Customer Response Center (CRC) at phone number 514-855-8500 for a disposition (refer to AMM 32-12-01-820-801). (23) If the mismatched values recorded in Table 1 of Appendix B are within the permitted values, record the clearances in Table 2 of Appendix B. (24) If the recorded clearance values are higher than the acceptable clearance values given in Table 2 of Appendix B, speak with a representative of the Customer Response Center (CRC) at phone number 514-855-8500 for a disposition (refer to AMM 32-12-01-820-801). Refer to Figure 17. (25) Record in Table 3 of Appendix B the overlap between the aft stop-fitting (1) and the MLG door stop fitting (refer to Figure 17, View C-C). (26) Do the extension of the main landing gear (refer to AMM 32-30-00-992-801). NOTE:Do not remove the hydraulic test fixture it will be needed in subsequent steps.

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 127 of 189 Oct 12/2012 Revision E, 13 Nov/2014 Refer to Figure 6 and Figure 17. (27) Remove material from the aft stop-fitting (14) as follows: NOTE:The overlap between the aft stop-fitting (14) and the MLG door stop fitting is recorded in Appendix B Table 3 (refer to Figure 17, Sheet 1, View C-C). (a) Remove material from the aft stop-fitting (14) to have a minimum overlap of 0.600 in. (15.24 mm) between the aft stop-fitting and the MLG door stop fitting (refer to Figure 6, Sheet 2, View E). NOTE:The aft stop fitting must be cut as close as possible to the stop pad. (b) Remove burrs and break sharp edges on the aft stop-fitting (14). (c) Do a radius of 0.250 in. (6.35 mm) on the aft stop-fitting (14) (refer to Figure 6, Sheet 2, View E). (d) Clean the bare surfaces of the aft stop-fitting (14) with clean dry cloths, with no lint, moist with aliphatic naphta or equivalent. (e) Dry the bare surfaces with clean dry cloths with no lint. Refer to Figure 13. (28) If necessary, remove the right MLG wheel bin (refer to AMM 53-83-89-000-801). (29) Remove of the seals (8), (10), (4), (11), and the seal retainers (5), (7), (9) as follows: (a) Remove the bolts (1), (6), (12), and the washers (3). (b) Remove and discard the nuts (2). (c) Remove the seal retainers (5), (7) and (9). (d) Remove the seals (8) and (11). (e) Remove and discard the seal (4) and (10).

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 128 of 189 Oct 12/2012 Revision E, 13 Nov/2014 Refer to Figure 12 and 14. (30) Remove material from the outboard MLG door and the MLG fairing as follows (refer to SRM 51-75-00-001-001):
CAUTION: DURING THE PROCEDURE PROTECT THE WORK AREA AND THE MLG. THIS WILL PREVENT DIRT, CHIPS, OR OTHER UNWANTED MATERIAL TO CAUSE DAMAGE TO THE AIRCRAFT. (a) Calculate the difference between the acceptable clearance values and the actual clearance values recorded in Table 2 of Appendix B. NOTE: The removal of the material must be done only on the MLG fairing and on the outboard MLG door. (b) On the upper forward section of the MLG fairing, between PTA and PTB, remove material up to a maximum of 0.23 in. (5.8 mm) (refer to Figure 14, Sheet 1, View C) (refer to SRM 51-75-00-001-001). Make sure that there is a minimum edge distance of 0.42 in (10.7 mm) from the fasteners. (c) On the forward lower section of the MLG fairing between PT B and PT C, remove material to a maximum of 0.16 in. (4.1 mm) (refer to Figure 14, Sheet 1, View D) (refer to SRM 51-75-00-001-001). Make sure that there is a minimum edge distance of 0.57 in (14.5 mm) from the fasteners. (d) On the aft section of the MLG fairing between PT D and PT E, remove the material to a maximum of 0.10 in. (2.5 mm) (refer to Figure 14, Sheet 1, View C) (refer to SRM 51-75-00-001-001). Make sure that there is a minimum edge distance of 0.42 in. (10.7 mm) with the fasteners. (e) On the aft section of the MLG fairing between PT E and PT F, remove the material to a maximum of 0.10 in. (2.5 mm) (refer to Figure 14, Sheet 1, View C) (refer to SRM 51-75-00-001-001). Make sure that there is a minimum edge distance of 0.57 in. (14.5 mm) with the fasteners.

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 129 of 189 Oct 12/2012 Revision E, 13 Nov/2014 Refer to Figure 6. (31) Do a liquid penetrant inspection or an eddy current inspection of the aft stop-fitting (14) as follows: (a) Do a liquid penetrant inspection or an eddy current inspection on the cut section of the aft stop-fitting (14) (refer to Figure 6, Sheet 2, View E, NDT 51-20-008-230, or NDT 51-20-006-250) (b) If there is no crack on the aft stop-fitting (14) go to next step. (c) If there is a crack on the cut section of the aft stop-fitting (14), speak with a representative of the Customer Response Center (CRC) at phone number 514-855-8500 for a disposition. (32) If there is no crack on the aft stop-fitting (14) do the steps that follow: (a) Apply chemical conversion compound or equivalent on the bare surfaces of the aft stop-fitting (14), (refer to SRM 51-21-11-001-001). (b) Apply epoxy primer on the bare surfaces and the hole of the aft stop-fitting (14) (refer to SRM 51-25-06-001-001). (c) Apply fluid resistant enamel color grey #16473 on the aft stop-fitting (14) (refer to SRM 51-25-16-001-001). Refer to Figure 15. For aircraft that have not had the forward fairing seal (11) incorporated with Service Bulletin 670BA-32-030 (33) Install the forward fairing seal (11), the upper seal retainer (13), the lower seal retainer (14) and the fairing safety-guide (12) as follows: (a) Temporary install and secure the fairing forward seal (11) and the retainer seal (5) on the MLG fairing (refer to Figure 15, Sheet 1, View B) (pre-mod). (b) Backdrill the holes from the MLG fairing through the fairing forward seal (11) to a diameter of 0.165 to 0.169 in. (4.19 to 4.29 mm). (c) Remove the fairing forward seal (11) and the seal retainer (5). (d) Remove the burrs from the forward seal (11).

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 130 of 189 Oct 12/2012 Revision E, 13 Nov/2014 For aircraft that had the forward fairing seal (11) incorporated with Service Bulletin 670BA-32-030 (34) Do a detail inspection on the fairing forward seal (11) for signs of cuts or damages in the material base. NOTE:For the MLG fairing seal (11) exterior low friction polyester fabric is not part of the base rubber material rejection criteria. For all aircraft (35) Temporary install and secure the aft fairing seal (10) to the seal retainer (9) (refer to Figure 15, Sheet 2, View D). (a) Backdrill the holes from the seal retainer (9) through the aft fairing seal (10) to a diameter of 0.165 to 0.169 in. (4.19 to 4.29 mm). (b) Remove the aft fairing seal (10) and the seal retainer (9). (c) Remove the burrs from the aft fairing seal (10). (36) Temporary install and secure the fairing forward seal (11), the seal retainer (5) and the fairing safety-guide (12) on the MLG fairing (refer to Figure 15, Sheet 1, View B, pre-mod). (a) Make the upper seal retainer (13) and lower seal retainer (14) from the seal retainer (5) as follows:
1 Make a line on the seal retainer (5) at the two ends of the fairing safety-guide (12) (refer to Figure 15, Sheet 1, View B, (Pre-Mod). NOTE:The maximum and the minimum clearance between the seal retainer (5) and the fairing safety-guide (12) is 0.13 to 0.07 in. (2.54 to 1.78 mm). 2 Remove the fairing safety-guide (12), the seal retainer (5) and the fairing forward-seal (11).
3 Make sure that there is a minimum edge distance of 0.39 in. (9.9 mm) at the two ends of the seal retainer (5).
4 Cut the seal retainer (5) at the cutting line (refer to SRM 51-71-00-001-001).
5 Do a radius of 0.25 in (6.3 mm) on the upper and lower seals (refer to Figure 15, Sheet 1, View B) (pre-Mod).

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 131 of 189 Oct 12/2012 Revision E, 13 Nov/2014

6 Temporarily identify the two seal retainers as follows:

a Identify the upper seal retainer as item (13).
b Identify the lower seal retainer as item (14).

c Discard the middle part of the seal retainer (5). (37) Temporary install and secure the fairing forward seal (11), the upper seal retainer (13), the lower seal retainer (14), and the fairing safety-guide (12) on the MLG fairing. (38) Make sure that there is a minimum of 0.03 in. (0.76 mm) of protrusion with the fairing safety-guide (12) and the edge of the MLG fairing (refer to Figure 15, Sheet 1, View C-C). (39) Make sure that the distance between the fastener hole of the fairing safety-guide (12) and the rebate of the MLG fairing is at minimum of 0.340 in. (1.8 mm). (40) Drill two holes from the pilot holes of the fairing safety-guide (12) through the fairing forward seal (11) and the forward fairing to a diameter of 0.097 to 0.100 (2.46 to 2.54 mm). (41) Increase the diameter of the two holes from the pilot holes of the fairing safety-guide (12) through the fairing forward seal (11) and the forward fairing to 0.165 to 0.169 in. (4.19 to 4.29 mm). (42) Backdrill four holes from the MLG fairing through the fairing forward seal (11) and the fairing safety-guide (12) to a diameter of 0.165 to 0.169 in. (4.19 to 4.29 mm). (43) Do a countersink of the two new holes in the MLG fairing to a diameter of 0.331 to 0.342 in. (8.41 to 8.69 mm) for the two bolts (1) (refer to Sheet 1, View B). (44) Remove the fairing safety-guide (12), the upper seal retainer (13), the lower seal retainer (14), and the fairing forward seal (11). (45) Remove burrs from the fairing safety-guide (12), the fairing forward seal (11), and the MLG fairing.

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 132 of 189 Oct 12/2012 Revision E, 13 Nov/2014

(46) Clean the fairing forward seal (11) and the fairing safety-guide (12), the upper seal retainer (13), the lower seal retainer (14), and the MLG fairing with clean, dry cloths with no lint, moist with aliphatic naphta or equivalent. (47) Dry the outer fairing forward-seal (11) and the fairing safety-guide (12), the upper seal retainer (13), the lower seal retainer (14), and the MLG fairing with clean, dry cloths with no lint. (48) Apply chemical conversion compound or equivalent on the bare metal surfaces of the upper seal retainer (13), the lower seal retainer (14), and the fairing safety-guide (12) (refer to SRM 51-21-11-001-001). (49) Apply epoxy primer on the bare surfaces of the upper seal retainer (13), the lower seal retainer (14) and the fairing safety-guide (12) (refer to SRM 51-25-06-001-001). (50) Apply fluid resistant enamel, color grey No.16473, on the upper seal retainer (13), the lower seal retainer (14), and the fairing safety-guide (12) (refer to SRM 51-25-16-001-001). (51) Apply composite-laminate coating on the bare surfaces of the MLG fairing (refer to SRM 51-25-52-001-001). (52) Apply epoxy primer in the countersunk holes of the MLG fairing and on the bare surfaces (refer to SRM 51-23-00-001-001). (53) Installation of the fairing forward seal (11), the fairing safety-guide (12), the upper seal retainer (13), and the lower seal retainer (14) as follows: (a) Install and secure the fairing forward seal (11), the fairing safety-guide (12), the upper seal retainer (13), and the lower seal retainer (14) on the MLG fairing. (b) With sealant, install the bolt (15) through the MLG fairing and the MLG fairing seal (refer to SRM 51-41-02-001-001). (c) Wet-install the bolts (1) through the MLG fairing with the washers (3) and the nuts (2) (refer to Figure 15, Sheet 1, View B) (refer to SRM 51-41-02-001-001). (d) Torque the nuts (2) and the screw (15) (refer to AMM 20-21-00-910-801).

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 133 of 189 Oct 12/2012 Revision E, 13 Nov/2014

(54) Install the seal (7) and the seal retainer (8) as follows: (a) Clean the seal retainer (7), the seal (8), and the aft area of the MLG with clean, dry cloths with no lint moist with aliphatic naphta or equivalent. (b) With sealant, install the bolts (1) through the MLG fairing, the seal (8), the seal retainer (7), the washers (3) and the nuts (2) (refer to SRM 51-23-00-390-810). (c) Torque the nuts (2) (refer to AMM 20-21-00-910-801). (55) Installation of the seal (10) and the seal retainer (9) as follows: (a) Clean the seal retainer (9), the seal (10), and the aft area of the MLG with clean, dry cloths with no lint, moist with aliphatic naphta or equivalent. (b) With sealant, install the bolts (6) through the MLG fairing, the seal (10), the seal retainer (9), the washers (3), and the nuts (2) (refer to SRM 51-23-00-001-001). (c) Torque the nuts (2) (refer to AMM 20-21-00-910-801). (d) Clean the area of the forward and the aft MLG fairing with clean, dry cloths with no lint, moist with aliphatic naphta or equivalent. (e) Dry the area with clean, dry cloths with no lint. Refer to Figure 7. (56) With an indelible ink pen or equivalent, identify the aft stop-fitting (1) of the MLG fairing as shown in the table below (refer to AMM 20-60-13-930-801).

PRE-SB PART NUMBER POST-SB PART NUMBER CC670-39076-2 KBA670-10500-40

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 134 of 189 Oct 12/2012 Revision E, 13 Nov/2014

(57) If only PART D is done, with a indelible ink pen or equivalent, identify the right MLG fairing with the applicable part number listed in the table below (refer to AMM 20-60-13-930-801).

PRE-SB PART NUMBER POST-SB PART NUMBER BA670-00001-2085 KBA670-10500-350 CC670-39005-951 KBA670-10500-550 CC670-39005-3 KBA670-10500-750 CC670-39005-5 KBA670-10500-135 CC670-39019-49 KBA670-10500-195 CC670-39019-963 KBA670-10500-155 CC670-39019-965 KBA670-10500-175 CC670-39019-51 KBA670-10500-215 KBA670-39005-3 KBA670-10500-615 KBA670-39005-5 KBA670-10500-635 KBA670-39005-7 KBA670-10500-655 KBA670-39005-9 KBA670-10500-675

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 135 of 189 Oct 12/2012 Revision E, 13 Nov/2014

(58) If PART C and PART D are done or PART D and PART A are done, with a indelible ink pen or equivalent, identify the MLG fairing assembly with the applicable part number listed in the table below (refer to AMM 20-60-13-930-801).

PRE-SB PART NUMBER POST-SB PART NUMBER BA670-00001-2085 KBA670-10500-3 CC670-39005-951 KBA670-10500-5 CC670-39005-3 KBA670-10500-7 CC670-39005-5 KBA670-10500-13 CC670-39019-49 KBA670-10500-19 CC670-39019-963 KBA670-10500-15 CC670-39019-965 KBA670-10500-17 CC670-39019-51 KBA670-10500-21 KBA670-39005-3 KBA670-10500-61 KBA670-39005-5 KBA670-10500-63 KBA670-39005-7 KBA670-10500-65 KBA670-39005-9 KBA670-10500-67 (59) Apply a bead of sealant on the aft stop-fitting (1) and the sealing member (refer to Figure 7, Sheet 2, View C) (refer to SRM 51-23-00-001-001). (60) Apply epoxy primer on the rivets (4) and (5), the bolts (2) and the nuts (3) (refer to SRM51-25-06-001-001). (61) Apply fluid resistant enamel, color grey No.16473, on the bolt (2), the nut (3), and the rivets (4) and (5) (refer to SRM 51-25-16-001-001). (62) Apply fluid resistant enamel on the bolts (2). Refer to the external paint scheme for the color (refer to SRM 51-25-16-001-001).

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 136 of 189 Oct 12/2012 Revision E, 13 Nov/2014 Refer to Figure 15. (63) Identify the seal retainers (13) and (14) with the applicable part number listed in the table below (refer to AMM 20-60-13-930-801).

PRE-SB PART NUMBER POST-SB PART NUMBER Seal retainer CC670-39245-2 Upper seal retainer (13) KBA670-10500-42 Lower seal retainer (14) KBA670-10500-44 Refer to Figure 17. (64) Do a clearance check of the right MLG doors (refer to AMM 32-12-01-220-801). NOTE:Use the post-Service Bulletin 670BA-32-040 task to do the clearance check. (65) Do the extension of the MLG (refer to AMM 32-12-01-220-801). (66) If it is not possible to complete all the instructions in this service bulletin because of the configuration of the aircraft, speak with a representative of Bombardier Customer Response Centre at phone number 514-855-8500 or send an e-mail at thd.crj@bombardier.com for analysis and to get an approved disposition to complete this service bulletin.

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 137 of 189 Oct 12/2012 Revision E, 13 Nov/2014 L. Job Close-Out (1) Remove all tools, equipment, and unwanted materials from the work area. (2) If removed, install the right MLG wheel bin (refer to AMM 53-83-89-400-801). (3) Remove the tags and close the circuit breakers that follow:

CB PANEL CB NO. NAME CBP-1 A12 HEATERS TAT CBP-1 A13 HEATERS AOA R CBP-1 A14 HEATERS PITOT R CBP-1 C13 ADG HEATER CBP-1 G1 PSEU CH A CBP-1 G2 NOSE STEER CBP-1 G13 HEATERS ADS CONT 2 CBP-1 G14 HEATERS STATIC R CBP-1 LOWER T7 HEATERS PITOT L CBP-1 LOWER T8 HEATERS AOA L CBP-1 LOWER T9 HEATERS PITOT STBY CBP-1 LOWER U7 ENG IGN A CBP-2 G1 PSEU CH B CBP-2 G2 NOSE STEER CBP-2 N6 ADG DEPLOY AUTO CBP-2 N9 MLG BAYOVHT DET CBP-2 P1 PSEU CH A CBP-2 P2 PSEU CH B CBP-2 LOWER S1 HEATERS STATIC L CBP-2 LOWER S2 HEATERS ADS CONT 1 CBP-2 LOWER S3 HEATERS ADS CONT STBY

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 138 of 189 Oct 12/2012 Revision E, 13 Nov/2014

CB PANEL NAME

CB NO. CBP-5 B10 ENG IGN B (4) If the right wheel bin was removed, do the operational test of the MLG overheat detection and warning system (refer to AMM 26-14-04-710-801). (5) Do the lubrication of the MLG and the MLG door (refer to AMM 12-20-32-640-802). (6) Do the operational test of the landing-gear extension/retraction system (refer to AMM 32-30-00-710-801). (7) Remove the aircraft from jacks (refer to AMM 07-11-01-586-801). (8) Make sure that step 2. B (64) of PART D is completed and meet the requirements before you do the entry in the applicable logbooks. (9) When PART D of this service bulletin is completed, add the weight and balance data shown in paragraph 1.I. of this service bulletin to the Weight and Balance Manual. Under ‘Description of Change’ enter “Service Bulletin 670BA-32-040 PART D, Revision E, incorporated.” (10) When PART D of this service bulletin is completed, make this entry in the applicable logbooks: “Service Bulletin 670BA-32-040, Revision E, Landing Gear - Main Landing Gear (MLG) and Doors - Increase the Clearances Between the MLG Fairing and the MLG Doors, PART D, incorporated.”

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 139 of 189 Oct 12/2012 Revision E, 13 Nov/2014 Inspection of the Stops on the MLG Fairing

Figure 1 (Sheet 1 of 2)ba7472a02.cgm, sd 7juin/2012 MLG FAIRING (REF)

AFT STOP (REF) C A

MLG FAIRING (REF) MLG FAIRING

(REF)

FWD STOP

(REF) B

Left side shown, right side opposite.

FASTENER (REF) FASTENER (REF) A

C

B NOTES

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 140 of 189 Oct 12/2012 Revision E, 13 Nov/2014 Inspection of the MLG Fairing Figure 1 (Sheet 2 of 2)ba7472a01.cgm, gb, 09/07/12 A

A MLG FAIRING (REF) 1. Inspection area is shaded. 2. Left side shown, right side opposite. NOTES

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 141 of 189 Oct 12/2012 Revision E, 13 Nov/2014Inspection of the Stops on the MLG Door Figure 2 (Sheet 1 of 4)ba7473a01.cgm, sd, 1 juin 2012

B A B

1 A

2 LEGEND 1. Stop. 2. Roller.

NOTE Left side shown, right side opposite. MLG INBOARD DOOR (REF)

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 142 of 189 Oct 12/2012 Revision E, 13 Nov/2014

Inspection of the Stops on the MLG Inboard Door

Figure 2 (Sheet 2 of 4)ba7473a02.cgm, sd, 1juin 2012 C 5

NOTE Left side shown, right side opposite. 3

D C

E

D

A

MLG INBOARD DOOR (REF)

E

4 LEGEND 3. Stop. 4. Stop. 5. Stop.

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 143 of 189 Oct 12/2012 Revision E, 13 Nov/2014

Inspection of The Forward Edge of The MLG Door

Figure 2 (Sheet 3 of 4)ba7473a03.cgm, sc, June 2012

MLG INBOARD DOOR (REF)

1. Left side shown, right side opposite. 2. Inspection area is shaded. G

F

F

G NOTES

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 144 of 189 Oct 12/2012 Revision E, 13 Nov/2014 Inspection of the aft Edge of The MLG Door

Figure 2 (Sheet 4 of 4)ba7473a04.cgm, sc/cr, July 2012 1. Left side shown, right side opposite. 2. Inspection area is shaded. H

F

H NOTES

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 145 of 189 Oct 12/2012 Revision E, 13 Nov/2014 Inspection of the Stops and Wedge Figure 3 (Sheet 1 of 2)ba7474a01.cgm, sd 1 juin 2012

B NOTE Left side shown, right side opposite. LEGEND 1. Stop. FWD LOWER SKIN (REF) A B A

1

FASTENER (REF)

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 146 of 189 Oct 12/2012 Revision E, 13 Nov/2014 Inspection of the Stops and Wedge Figure 3 (Sheet 2 of 2)ba7474a02.cgm, sd, 1 juin 2012 A

C NOTE Left side shown, right side opposite. 3

2 FASTENER (REF)

FASTENER (REF) LEGEND 2. Stop. 3. Wedge. C

AFT LOWER SKIN (REF)

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 147 of 189 Oct 12/2012 Revision E, 13 Nov/2014 Removal of the Roller Assembly Figure 4 (Sheet 1 of 1)ba7470a01.cgm, sd 30mai/2012

B 1 5

5 4 3 5

2

6 LEGEND 1. Roller 601R38119--19. 2. Cotter pin MS24665--153. 3. Nut MS17826--3. 4. Bolt NAS6203--17D. 5. Washer NAS1149D0332J. 6. Bushing NAS76A3--024P. A

A B INBOARD MLG DOOR (REF)

OUTBOARD MLG DOOR (REF)

NOTE Left side shown. Right side opposite.

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 148 of 189 Oct 12/2012 Revision E, 13 Nov/2014Installation of the New Roller Assembly Figure 5 (Sheet 1 of 3)ba7499a01.cgm, sc/kp, February 17, 2014 A

NOTE 1. Left side shown. Right side opposite. LEGEND 1. Drill jig 670BA32040K90--101 (LH) 670BA32040K90--102 (RH). 2. Drill bushing 670BA32040K90--112. 3. Reamer bushing 670BA32040K90--113.

AFT MEMBER ASSEMBLY (REF)

B C 1

2

OR 3 DOWEL PIN (REF) POINT WHERE THE DOWEL PIN TOUCH THE AFT MEMBER ASSEMBLY

C SURFACE OF THE TOOL THAT TOUCH THE AFT MEMBER ASSEMBLY (REF) POINT WHERE THE DOWEL PIN TOUCH THE AFT MEMBER ASSEMBLY

C -- C 2 OR 3 B

VIEW LOOKING FORWARD

A

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 149 of 189 Oct 12/2012 Revision E, 13 Nov/2014Installation of the New Roller Assembly Figure 5 (Sheet 2 of 3)ba7499a02.cgm, mgr, 5 sept 2012 D A

D 2

4 OUTBOARD LUG (REF) INBOARD LUG (REF) 7 3 OUTBOARD LUG (REF)

INBOARD LUG (REF) D 0.3147 TO 0.3157 in.

(7.99 TO 8.02 mm) 0.3141 TO 0.3159 in. (7.98 TO 8.02 mm) LEGEND 7. Flanged bushing CC670--39165--1.

0.15 in. (3.8 mm) MINIMUM TYP. NOTES 1. Left side shown. Right side opposite. Liquid nitrogen or solid, technical, carbon dioxide (dry ice). Sealant. Filet of sealant all around. 5. Conversion coating. 2

4 3

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 150 of 189 Oct 12/2012 Revision E, 13 Nov/2014Installation of the New Roller Assembly Figure 5 (Sheet 3 of 3)ba7499a03.cgm, mg, 1 Aug. 2012

7 1. Left side shown.

Right side opposite. Greese aeroshell. Mastinox. 6
7 5. Roller CC670--10926--1. 6. Bushing NAS75C3A030. 7. Flanged bushing CC670--39165--1. 8. Self locking nut B0203010--3. 9. Washer MS21299C3K. 10. Cotter pin MS24665--86. 11. Bolt NAS6303--20D. 12. Washer NAS1149E0363P. E

F G

G --G 0.030 in. (0.76 mm)

6 G

5

9 7

8 12

10

6 11 AFT MEMBER (REF) F

E INBOARD MLG DOOR (REF)

OUTBOARD MLG DOOR (REF)

NOTES

LEGEND

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 151 of 189 Oct 12/2012 Revision E, 13 Nov/2014 Aft Stop-Fitting --- Removal Figure 6 (Sheet 1 of 2)ba7478a01.cgm, mg, 1 Aug. 2012 A 1 A

1. Bolt. 2. Washer. 3. Nut. 4. Seal aft fairing. 5. Aft retainer seal. 6. Bolt NAS8603--6. 7. Stop pad. 8. Laminated shim. 9. Shim. 10. Washer NAS1149E0363P. 11. Nut MS21043--3. 12. Bolt. 13. Nut. 14. Aft stop--fitting. 17. Solid rivet.

D

D 2 3 4
5 6 7 8 9

10 11

14 12

13 B MLG FAIRING (REF)

14 SEALING MEMBER MLG (REF)

C B

2

1. Left side shown. Right side opposite. Sealant to be removed. 2 17 C

NOTES LEGEND

PRE--MOD PRE--MOD

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 152 of 189 Oct 12/2012 Revision E, 13 Nov/2014 Aft Stop-Fitting --- Removal Figure 6 (Sheet 2 of 2)ba7478a02.cgm, sc, 28 jan 2013 A MLG FAIRING (REF)

0.250 in. (6.35 mm) RADIUS 14 E

0.190 TO 0.194 in (4.83 TO 4.93 mm). DRILL CODE

E POST--MOD BREAK SHARP EDGE 14 6 10 11

15 3

16

NOTES 1. Left side shown. Right side opposite. Part to trim. Material to be removed. 3 LEGEND 6. Bolt NAS8603--6. 10. Washer NAS1149EO363P. 11. Nut MS21043--3. 14. Aft stop--fitting KBA670--10500--39 (LH) KBA670--10500--40 (RH). 15. Shim fairing CC670--39161--1. 16. Laminated shim CC670--39160--1

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 153 of 189 Oct 12/2012 Revision E, 13 Nov/2014

Removal of Material and Installation of the Aft Stop-Fitting

Figure 7 (Sheet 1 of 2)ba7513a05.cgm, cr, aug--2012 A MLG FAIRING

(REF) D

MLG FAIRING (REF) 0.53 TO 0.61 in. (13.4 TO 15.5 mm)

VIEW LOOKING INBOARD

D

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 154 of 189 Oct 12/2012 Revision E, 13 Nov/2014

Removal of Material and Installation of the Aft Stop-Fitting

Figure 7 (Sheet 2 of 2)ba7512a01.cgm, sc/cr, 5 sept 2012 A

GAP SEAL (REF)

1 C VIEW LOOKING AFT A B MLG FAIRING

(REF)

1 2

3

BPOST--MODC SEALING MEMBER (REF). 6 789

1011 7. Stop pad CC670--39159--1 (LH), CC670--39159--2 (RH). 8. Laminated shim CC670--39160--1 (LH), CC670--39160--2 (RH). 9. Shim CC670--39161--1. 10. Washer NAS1149E0363P. 11. Nut MS21043--3. LEGEND 1. Aft stop-fitting CC670--39076--1 (Pre--Mod LH), CC670--39076--2 (Pre--Mod RH), KBA670--10500--39 (Post--Mod LH), KBA670--10500--40 (Post--Mod RH). 2. Bolt B0206004AG6--5. 3. Nut B0203014--3. 4. Rivet MS20470AD4--7A. 5. Rivet MS20470AD5--7A. 6. Bolt NAS8703--6. 2 NOTE 1. Left side shown. Right side opposite. Rivet heads installed near side.

2 PART NUMBER NAME ITEM FASTENER CODE MS20470AD4--7A MS20470AD5--7A Rivet Rivet 4 5

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 155 of 189 Oct 12/2012 Revision E, 13 Nov/2014 Rod End --- Removal/Installation Figure 8 (Sheet 1 of 1)ba7469a02.cgm,cr,05--july--2012 A

LEGEND 7. Cotter pin. 8. Nut. 9. Washer. 10. Washer. 11. Pin. 12. Bushing. 13. Rod end.

A B

13 10 12 98

7 11

B

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 156 of 189 Oct 12/2012 Revision E, 13 Nov/2014 Aft Seal MLG Door Removal Figure 9 (Sheet 1 of 3) Cba7513a01.cgm, sc, 03--Aug 2012

MLG INBOARD DOOR (REF) A

A B

C PRE--MOD B PRE--MOD AFT SEAL

MLG DOOR (REF)

AFT SEAL

MLG DOOR (REF) 1 2

1

1

2 LEGEND 1.Rivet. 2.Washer.

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 157 of 189 Oct 12/2012 Revision E, 13 Nov/2014Table for Aft Seal MLG Door Installation Figure 9 (Sheet 2 of 3)ba8187a02.cgm, sc/kp/cr, 24--mar--2014 LEGEND 3. Aft seal CC670--10893--3 (LH), CC670--10893--4 (RH). NOTES Fastener head far side. Washer installed between seal and expanded end of the fastener. No washer is necessary. 2 3

4
5 The gap must be between the door and the seal.

POST--MOD F 3

EPOST--MOD 3

F 4 AERODYNAMIC SEALANT (REF) A

D 2 MLG INBOARD DOOR (REF) 3

4 6 or 7

5 E

0.110 in. (2.79 mm)

CONSTANT GAP5 D

3

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 158 of 189 Oct 12/2012 Revision E, 13 Nov/2014 Aft Seal MLG Door Installation Figure 9 (Sheet 3 of 3)ba8187a03.cgm, kp, 24--mar--2014 NAS1149DN832K NAS9302E--5--03 Washer Blind Rivet PART NUMBER NAME ITEM 4 5 SYMBOL HOLE DIAMETER
0.160 TO 0.164 in. (4.06 TO 4.17 mm)

NAS1149D0332K NAS9305E--5--03 Washer Blind Rivet 6 5 N/A

NAS1149D0332K NAS9303E--6--03 Washer Blind Rivet 6 5

NAS1149D0832K

NAS9305E--6--03 Washer Blind Rivet 6 5

NAS1149D0432K

CR3224--8--03 Washer Blind Rivet 7 5 N/A

N/A OR

OR

OR

OR FASTENER SYMBOL CHART

0.176 TO 0.180 in. (4.47 TO 4.57 mm)

0.192 TO 0.196 in. (4.88 TO 4.98 mm) 0.214 TO 0.218 in. (5.44 TO 5.54 mm)

0.214 TO 0.218 in. (5.44 TO 5.54 mm) 0.205 TO 0.209 in. (5.21 TO 5.31 mm)

0.256 TO 0.261 in. (6.50 TO 6.63 mm)

NOTES 1. It is permitted to install oversize or next size fasterners in lieu of NAS9302E--5--03. Open washer ID to specified hole diameter. 6 6

6

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 159 of 189 Oct 12/2012 Revision E, 13 Nov/2014

MLG Inboard and Outboard Doors Attachments

Figure 10 (Sheet 1 of 1)C 1 4

7 8 5 6

B B 0.030 TO 0.060 in. (0.76 TO 1.52 mm) 0.000 1 4 7 8 9

5 2 3 6

--B B ASSEMBLED 9 A C A

NOTES 1. MLG not shown for clarity. 2. Left side shown. Right side opposite.ba7469a01.cgm, sd/cr-- 24--aug--2012 10 10

12 11

LEGEND 1. Bolt. 2. Bushing. 3. Bushing. 4. Sleeve bushing. 5. Washer NAS1149E0663P. 6. Nut B0203010L6. 7. Washer NAS1149C0832R. 8. Washer NAS1149C0863R. 9. Cotter pin MS24665--300. 10. Washer. 11. Bushing. 12. Bushing.

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 160 of 189 Oct 12/2012 Revision E, 13 Nov/2014Removal and Installation of Fasteners Figure 11 (Sheet 1 of 3)ba7513a01.cgm, sc/kp,February 17, 2014 B0205017AD5--5S PART NUMBER NAME Rivet ITEM 7 FASTENER CODE NOTES

1. Countersink to be done on nearside of the forward member. Fastener to be removed.

B POST--MOD FORWARD MEMBER MLG DOOR (REF)

B PRE--MOD B

A MLG INBOARD DOOR (REF) A

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 161 of 189 Oct 12/2012 Revision E, 13 Nov/2014Removal and Installation of Fasteners Figure 11 (Sheet 2 of 3)ba7513a02.cgm, cr/kp, February 17, 2014 A MLG INBOARD DOOR (REF)

C PRE--MOD CPOST--MOD NOTES 1. Countersink to be done on nearside of the forward member. Fastener to be removed.

B0205017AD5--5S PART NUMBER NAME Rivet ITEM 7 FASTENER CODE C

INBOARD INNER SKIN (REF) INBOARD INNER SKIN (REF)

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 162 of 189 Oct 12/2012 Revision E, 13 Nov/2014Removal and Installation of Fasteners Figure 11 (Sheet 3 of 3)ba7513a03.cgm, sc/kp, February 18, 2014 A MLG INBOARD DOOR (REF)

E E D FORWARD MEMBER MLG DOOR (REF)

AERODYNAMIC SEALING AREA (REF) END OF STIFFENER (REF)

D POST--MOD

2.61 in. (66.3 mm)

0.48 in. (12.2 mm)0.94 in.

(23.9 mm) 0.04 in.

(1.0 mm) 0.12 in. (3.1 mm) RADIUS 2.00 in. (50.8 mm) RADIUS 0.25 in.

(6.3 mm) RADIUS OUTER SKIN

INBOARD (REF)

FORWARD MEMBER (REF)

INNER SKIN INBOARD (REF) POINT A (REF)

POINT B

(REF) POINT C (REF) WEB (REF)

2

POST--MOD

E -- E NOTE Material to be removed. 2

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 163 of 189 Oct 12/2012 Revision E, 13 Nov/2014

Clearance And Mismatch Between MLG Fairing and MLG Doors

Figure 12 (Sheet 1 of 2)ba7515a01.cgm,FP, Oct 21. 2013 DOOR BRUSH (REF) B

PT 9

PT 10 0.50 in.

(12.7 mm) 2.50 in. (63.5 mm)

PT 11

PT 12

0.50 in. (12.7 mm) PT 13 0.50 in. (12.7 mm)PT 2 PT 3 0.50 in. (12.7 mm) 0.50 in. (12.7 mm) PT 5

PT 4 PT 6

2

3 2 2

2 A

VIEW LOOKING DOWN B NOTES Aligned with door stiffener. From angle edge. Left side shown, right side opposite. 2

5. 3 3 A

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 164 of 189 Oct 12/2012 Revision E, 13 Nov/2014

Clearance And Mismatch Between MLG Fairing and MLG Doors

Figure 12 (Sheet 2 of 2) 0.50 in. (12.7 mm)

PT 19 0.50 in. (12.7 mm)

PT 20 PT 25 (REF) PT 24 (REF) PT 16 PT 17 PT 15
PT 18 PT 23

PT 22

PT 21 1 1 1

1 1

1 1

1 1

DOOR BRUSH (REF) PT 14 1.50 in. (38.1 mm) PT 1

VIEW LOOKING UP C

VIEW LOOKING INBOARD E D

D C

Eba7515a02.cgm,FP, Oct 21. 2013 NOTES Aligned with screw. From angle edge. From end of seal. Left side shown, right side opposite. 1 3

5. 4 4 1 3 3

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 165 of 189 Oct 12/2012 Revision E, 13 Nov/2014 Seal and Seal Retainer --- Removal Figure 13 (Sheet 1 of 1)ba7514a01.cgm, sc, 28 jan 2013 A B A MLG FAIRING (REF)

B PRE MOD NOTES

4 OR 11 5 1 2 3 6 2 3 8 1 2 3 7 9

10 Left side shown, right side opposite. LEGEND 1. Bolt NAS7502U4. 2. Nut MS21043--08. 3. Washer NAS1149EN832P. 4. Seal. 5. Seal retainer CC670--39245--1 (LH), CC670--39245--2 (RH). 6. Bolt NAS7502U3. 7. Seal retainer. 8. Seal. 9. Seal retainer. 10. Seal. 11. Fairing, forward seal CC670--38244--5SB (LH), CC670--38244--6SB (RH). 12. Bolt NAS7502U5.

12

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 166 of 189 Oct 12/2012 Revision E, 13 Nov/2014

Removal of Material on MLG Fairing and MLG Door

Figure 14 (Sheet 1 of 2)ba7514a01.cgm,cr/kp, February 18, 2014 MLG FAIRING (REF)

C

0.10 in. (2.5 mm) (MAXIMUM) PT A
0.23 in. (5.8 mm) (MAXIMUM)
EDGE to TRIM PT A to PT B

PT B

ENSURE MINIMUM ED OF 0.42 in. (10.7 mm) (12 PLACES) PT C PT D

PT F PT B

PT C

0.10 in. (2.5 mm) (MAXIMUM)0.10 in. (2.5 mm)

(MAXIMUM) 0.23 in. (5.8 mm) (MAXIMUM)0.16 in. (4.1 mm)

(MAXIMUM) A

C B A

B NOTES 1. Left side shown, right side opposite. 2. Minimum of edge distance of 0.42 in. (10.7 mm) PT A to PT B, PT D to PT E. 3. Minimum of edge distance of 0.57 in. (14.5 mm) PT B to PT C and PT E to PT F.

PT E

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 167 of 189 Oct 12/2012 Revision E, 13 Nov/2014

Removal of Material on MLG Fairing and MLG Door

Figure 14 (Sheet 2 of 2)ba7514a03.cgm, sc/kp, 24--mar--2014

PT B (ALIGNED WITH SCREW) PT C (ALIGNED WITH SCREW)

H 0.08 in. (2.0 mm)

(MAXIMUM) 0.13 in. (3.3 mm) (MAXIMUM)

J PT C

0.08 in. (2.0 mm) (MAXIMUM) PT D

0.25 0.010 in. (6.3 2.5 mm) RADIUS PT A

J G

F PT B EDGE TO TRIM PT A TO PT D

PT C H NOTES 1. Left side shown, right side opposite. 4. Minimum edge distance between PT A to PT D is 0.23 in. (6.0 mm). D

INBOARD MLG DOOR (REF) E F ANGLE CC670--10521 (REF) D

PT A 0.25 in.

(6.3 mm)

0.13 in. (3.3 mm) (MAXIMUM) 0.25 0.010 in. (6.3 2.5 mm) RADIUS

G E

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 168 of 189 Oct 12/2012 Revision E, 13 Nov/2014Seal and Seal Retainer --- Installation Figure 15 (Sheet 1 of 2)ba7514a04.cgm, sc, 28 jan 2013 DRILL CODE 0.165 to 0.169 in. (4.19 to 4.29 mm).

11 13

12

14 1 2 3 C C A B MLG FAIRING

(REF)

VIEW LOOKING OUTBD POST MOD B VIEW LOOKING OUTBD PRE MOD B LEGEND 1. Bolt NAS7502U4. 2. Nut MS21043--08. 3. Washer NAS1149EN832P. 5. Seal retainer CC670--39245--1 (LH), CC670--39245--2 (RH). 11. Fairing Forward seal CC670--39244--5SB (LH), CC670--39244--6SB (RH). 12. Fairing Safety--guide CC670--39158--1SB (LH), CC670--39158--2SB (RH). 13. Upper Seal retainer KBA670--10500--41 (LH), KBA670--10500--42 (RH). 14. Lower seal retainer KBA670--10500--43 (LH), KBA670--10500--44 (RH).

C C -- 9 8

7 12

11

0.030 in.

(0.76 mm)

0.340 in. (8.64mm) MINIMUM

9 8 7 6 NOTES 1. Left side shown, right side opposite. 5. Radius 0.25 in. (6.3 mm) clearance 0.10 in. (2.5 mm). Countersink far side. Rebate of the MLG fairing. The distance between the fastener hole and the rebate of the MLG fairing. Minimum clearance between the fairing safety--guide and the MLG fairing. 12 5

0.25 in. (6.3 mm) RADIUS (2 PLACES) 0.07 TO 0.13 in. (1.8 TO 2.5 mm)

6 0.07 TO 0.13 in. (1.8 TO 2.5 mm)

15. Bolt NAS7502U5.

15

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 169 of 189 Oct 12/2012 Revision E, 13 Nov/2014Seal and Seal Retainer --- Installation Figure 15 (Sheet 2 of 2)ba7514a05.cgm, sc, 28 jan 2013 A D MLG FAIRING (REF)

6 2 3 8 1 2 3 7 9

10

D VIEW LOOKING OUTBD POST--MOD

LEGEND 1. Bolt NAS7502U4. 2. Nut MS21043--08. 3. Washer NAS1149EN832P. 6. Bolt NAS7502U3. 7. Seal retainer CC670--39070--1 (LH), CC670--39070--2 (RH). 8. Seal CC670--39067--1 (LH), CC670--39067--2 (RH). 9. Seal retainer CC670--39248--1 (LH), CC670--39248--2 (RH). 10. Aft fairing seal CC670--39163--1SB (LH), CC670--39163--2SB (RH).
NOTES 1. Left side shown, right side opposite. 2. Fastener head far side.

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 170 of 189 Oct 12/2012 Revision E, 13 Nov/2014 Nameplate --- Removal/Installation Figure 16 (Sheet 1 of 1)ba2982a01_01.cgm, gb, 5 sept 2012

B FORWARD

MEMBER (REF) AFT MEMBER (REF)

B

INBOARD INNER SKIN (REF) 7.0 in. (178 mm) APPROXIMATELY

A 2.0 in. (51 mm) APPROXIMATELY 1. Identification plate S6472--4. LEGEND A 1

Bombardier Inc. Montreal, Canada DWG.NO.: MODEL: DATE:
MODS: CAGE CODE 88308

QC: SERIAL: ISSUE:

88308/S6472--4

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 171 of 189 Oct 12/2012 Revision E, 13 Nov/2014

Aft Stop-Fitting and the Forward Fairing Seal Overlap

Figure 17 (Sheet 1 of 1)ba7614a01.cgm, sc, 23 jan 2013

ASSY FAIRING MLG VIEW LOOKING INBOARD C

INBD MLG DOOR ASSY

SEAL OVERLAP DOOR STOP FITTING (REF) B DA

C C D
C B

A

VIEW LOOKING DOWN ON LHS D D VIEW LOOKING UP ON LHS 1

2 0.600 in. (15.24. mm) MINIMUM. LEGEND 1. Aft stop--fitting KBA670--10500--39 (LH) KBA670--10500--40 (RH). 2. Fairing, forward seal CC670--38244--5SB (LH), CC670--38244--6SB (RH).

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 172 of 189 Oct 12/2012 Revision E, 13 Nov/2014 Removal of the Inboard MLG Door Figure 18 (Sheet 1 of 2)ba8186a01.cgm, kp/kl, July 23, 2014 B

A A

B 1

PRE--MOD NOTE 1. Left side shown, right side opposite. LEGEND 1. Inboard MLG door

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 173 of 189 Oct 12/2012 Revision E, 13 Nov/2014 Installation of the Inboard MLG Door Figure 18 (Sheet 2 of 2)ba8158a02.cgm, kp, January 30, 2014 B

A

B LEFT SIDE SHOWN RIGHT SIDE OPPOSITE 2 LEGEND 2. Inboard MLG door CC670--10520--15 (LH) CC670--10520--16 (RH)

POST--MOD

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 174 of 189 Oct 12/2012 Revision E, 13 Nov/2014 3. MATERIAL INFORMATION
A. Kit Information Kit Contents:
KIT 670BA32040K1A
PART NUMBER QTY NAME ALTERNATE PARTS NOTES
600-10213-41 1 Laminated Shim CC670-10893-3 1 Seal MLG Door L/H CC670-10926-1 1 Roller MLG Door L/H and R/H CC670-39158-1SB 1 Safety Guide MLG Door L/H CC670-39158-1-01

CC670-39159-1 1 Stop Pad MLG Door L/H CC670-39160-1 1 Laminated Shim MLG Door CC670-39161-1SB 1 Shim MLG CC670-39161-1-01 CC670-39163-1SB 1 Seal AFT MLG Fairing L/H CC670-39161-1-01

CC670-39165-1 1 Bushing MLG Door

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 175 of 189 Oct 12/2012 Revision E, 13 Nov/2014 KIT 670BA32040K2A

PART NUMBER QTY NAME ALTERNATE PARTS NOTES
600-10213-41 1 Laminated Shim CC670-10893-4 1 Seal MLG Door R/H CC670-10926-1 1 Roller MLG Door L/H & R/H CC670-39158-2SB 1 Safety Guide MLG Door R/H CC670-39158-2-01

CC670-39159-2 1 Stop Pad MLG Door R/H CC670-39160-1 1 Laminated Shim MLG Door CC670-39161-1SB 1 Shim MLG CC670-39161-1-01 CC670-39163-2SB 1 Seal AFT MLG Fairing R/H CC670-39161-1-01

CC670-39165-1 1 Bushing MLG Door

KIT 670BA32040K3A¡
PART NUMBER QTY NAME ALTERNATE PARTS NOTES
B0203010-3 2 Nut, Self-Locking B0203010L6 2 Nut B0203014-3 3 Nut Self-Locking B0205017AD5-5S 13 Solid Rivet B0206004AG6-5 3 Bolt MS20470AD4-7A 2 Solid Rivet MS20470AD5-7A 3 Solid Rivet MS21043-08 32 Nut MS21043-3 2 Nut

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 176 of 189 Oct 12/2012 Revision E, 13 Nov/2014

PART NUMBER NOTES ALTERNATE PARTS NAME QTY
MS21299C3K 1 Washer MS24665-300 2 Cotter Pin MS24665-86 2 Cotter Pin NAS1149CO832R 1 Washer NAS1149CO863R 1 Washer NAS1149DN832K 6 Washer NAS1149EN832P 2 Washer NAS1149EO363P 1 Washer NAS6303-20D 1 Bolt NAS7502U4 2 Bolt NAS75C3A030 1 Bushing NAS8703-6 2 Bolt NAS9302E-5-03 6 Blind Rivet NAS9305E-5-03 6 Blind Rivet 1st oversize S6472-4 1 NamePlate ¡ The kit can contain more hardware and/or material than necessary.

KIT 670BA32040K4A¡
PART NUMBER QTY NAME ALTERNATE PARTS NOTES
B0203010-3 2 Nut, Self-Locking B0203010L6 2 Nut B0203014-3 3 Nut, Self-Locking B0205017AD5-5S 13 Solid Rivet B0206004AG6-5 3 Bolt MS20470AD4-7A 2 Solid Rivet

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 177 of 189 Oct 12/2012 Revision E, 13 Nov/2014

PART NUMBER NOTES ALTERNATE PARTS NAME QTY
MS20470AD5-7A 2 Solid Rivet MS21043-08 32 Nut MS21043-3 2 Nut MS21299C3K 1 Washer MS24665-300 2 Cotter Pin MS24665-86 2 Cotter Pin NAS1149CO832R 1 Washer NAS1149CO863R 1 Washer NAS1149DN832K 6 Washer NAS1149EN832P 2 Washer NAS1149EO363P 1 Washer NAS6303-20D 1 Bolt NAS7502U4 2 Bolt NAS75C3A030 1 Bushing NAS8703-6 2 Bolt NAS9302E-5-03 6 Blind Rivet NAS9305E-5-03 6 Blind Rivet 1st oversize S6472-4 1 NamePlate ¡ The kit can contain more hardware and/or material than necessary.

KIT 670BA32040K5
PART NUMBER QTY NAME ALTERNATE PARTS NOTES
CC670-39244-5SB 1 Seal MLG Door L/H CC670-39244-5-01

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 178 of 189 Oct 12/2012 Revision E, 13 Nov/2014 KIT 670BA32040K6

PART NUMBER QTY NAME ALTERNATE PARTS NOTES
CC670-39244-6SB 1 Seal MLG Door R/H CC670-39244-6-01

KIT 670BA32040K7
PART NUMBER QTY NAME ALTERNATE PARTS NOTES
600-10213-41 1 Laminated Shim B0203010L6 2 Nut B0203014-3 3 Nut Self---Locking B0206004AG6---5 3 Bolt CC670-39158-1SB 1 Safety Guide MLG Door L/H CC670-39158-1-01

CC670-39159-1 1 Stop Pad MLG Door L/H CC670-39160-1 1 Laminated Shim MLG Door CC670-39161-1SB 1 Shim MLG CC670-39161-1-01 CC670-39163-1SB 1 Seal AFT MLG Fairing L/H CC670-39161-1-01

MS20470AD4-7A 2 Solid Rivet MS20470AD5-7A 3 Solid Rivet MS21043-08 32 Nut MS21043-3 2 Nut MS24665-300 2 Cotter Pin NAS1149CO832R 1 Washer NAS1149CO863R 1 Washer NAS1149EN832P 2 Washer

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 179 of 189 Oct 12/2012 Revision E, 13 Nov/2014

PART NUMBER NOTES ALTERNATE PARTS NAME QTY
NAS7502U4 2 Bolt NAS8703-6 2 Bolt

KIT 670BA32040K8
PART NUMBER QTY NAME ALTERNATE PARTS NOTES
600-10213-41 1 Laminated Shim B0203010L6 2 Nut B0203014-3 3 Nut Self---Locking B0206004AG6-5 3 Bolt CC670-39158-2SB 1 Safety Guide MLG Door L/H CC670-39158-1-01

CC670-39159-2 1 Stop Pad MLG Door L/H CC670-39160-1 1 Laminated Shim MLG Door CC670-39161-1SB 1 Shim MLG CC670-39161-1-01 CC670-39163-2SB 1 Seal AFT MLG Fairing L/H CC670-39161-2-01

MS20470AD4-7A 2 Solid Rivet MS20470AD5-7A 3 Solid Rivet MS21043-08 32 Nut MS21043-3 2 Nut MS24665-300 2 Cotter Pin NAS1149CO832R 1 Washer NAS1149CO863R 1 Washer NAS1149EN832P 2 Washer

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 180 of 189 Oct 12/2012 Revision E, 13 Nov/2014

PART NUMBER NOTES ALTERNATE PARTS NAME QTY
NAS7502U4 2 Bolt NAS8703-6 2 Bolt

KIT 670BA32040K9
PART NUMBER QTY NAME ALTERNATE PARTS NOTES
CR3224-8-03 12 Rivet, Blind NAS9303E-6-03 12 Rivet, Blind NAS9305E-6-03 12 Rivet, Blind NAS1149D0332K 12Washer NAS1149D0432K 12Washer

KIT 670BA32-040K90¡
PART NUMBER QTY NAME ALTERNATE PARTS NOTES
670BA32040K90-1 1 Drill Jig MLG Door Roller ¡ Refer to paragraph 1.H. for special terms and conditions.

NOTE: For permitted superseded parts, refer to the Parts Supersession Cross References Lists at www.iflybombardier.com under Resources --- Engineering Documents. NOTE: Some parts listed in the kit content of this service bulletin are supplied in a temporary condition of supply configuration. These parts are identified with a ---SB, /SB, SB or other suffix after the Bombardier engineering part number. When the parts are installed, with the instructions given in the Accomplishment Instructions of this service bulletin, the parts agree with the requirements of the engineering configuration. Refer to the SB Introduction document for more explanation.

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 181 of 189 Oct 12/2012 Revision E, 13 Nov/2014 B. Consumable Information The materials that follow are necessary to do this service bulletin. You can order them from Bombardier or purchase them directly from industry sources. If the material is ordered from Bombardier, there can be some lead time because of the shelf life of the material. CONSUMABLES SPECIFICATION QUANTITY NAME REFERENCE MIL-PRF-23827 As

necessaryGrease, Aeroshell #33 04-004 [1]
Not Specified As

necessaryLiquid nitrogen 05-351 [1]

MIL-PRF-81733 Type IV As

necessaryCompound, sealing and

coating, corrosion inhibitive faying surface sealing 09-020 [2]

BAMS 565-001 (CMS 565-01) As

necessaryFluid resistant Epoxy Primer 13-006 [2]

BAMS 565-002 As

necessaryFluid resistant enamel for

aircraft interior Color clear gloss 07-019 [2]

BAMS 565-002 As

necessaryFluid resistant enamel for

aircraft interior Color grey No.16473 per FED-STD-595 07-019 [2]

BAMS 565-002 As

necessaryFluid resistant enamel for

aircraft interior (Refer to aircraft paint scheme for color) 07-019 [2]

NASM20995C As

necessaryLockwire,corrosion-resistant

steel MS20995C32 05-004 [1]

AMS 2644 As

necessaryDeveloper, Form A - dry

powder 05-051 [1]
[1] Refer to AMM 51-31-00-992-801 [2] Refer to SRM 51-31-00-001-001.

NOTE:To complete this list of consumables, refer to the different tasks given as references in this service bulletin

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 182 of 189 Oct 12/2012 Revision E, 13 Nov/2014 C. Special Tools and Equipment

SPECIAL TOOLS AND EQUIPMENT PART NUMBER QUANTITY NAME ALTERNATE PARTS 34 gpm and 3000 PSI 1 Hydraulic Power Unit ¡ Refer to the Illustrated Tool and Equipment Manual
NOTE:To complete this list of special tools and equipment, refer to the different tasks, the service bulletin and the Appendix that are given as references in this service bulletin.
D. Disposition of Parts The table that follows shows the disposition of parts on the aircraft (or spares), and the relationship between these parts to the new parts to be installed through the incorporation of this service bulletin.
PRE-SB PART NUMBER NAME QTY DC POST-SB PART NUMBER

CC670-10520-967 Inboard MLG Door Assembly, L/H 1 RWKKBA670-10500-23

CC670-10520-968 Inboard MLG Door Assembly, R/H 1 RWKKBA670-10500-24

CC670-10520-967 CC670-10520-2011 CC670-10520-2013 CC670-10520-2015 CC670-10520-13 KCC670-10900-1 KCC670-10900-3 KCC670-10900-5 KCC670-10901-1 KCC670-10901-3 Inboard MLG Door Assembly, L/H 1 SAL [3] CC670-10520-15 [1]

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 183 of 189 Oct 12/2012 Revision E, 13 Nov/2014

PRE-SB PART NUMBER POST-SB PART NUMBER DC QTY NAME

CC670-10520-968 CC670-10520-2012 CC670-10520-2014 CC670-10520-2016 CC670-10520-14 KCC670-10900-2 KCC670-10900-4 KCC670-10900-6 KCC670-10901-2 KCC670-10901-4 Inboard MLG Door Assembly, R/H 1 SAL [4] CC670-10520-16 [2]

CC670-10520-2011 Inboard MLG Door Assembly, L/H 1 RWKKBA670-10500-25

CC670-10520-2012 Inboard MLG Door Assembly, R/H 1 RWKKBA670-10500-26

CC670-10520-2013 Inboard MLG Door Assembly, L/H 1 RWKKBA670-10500-27

CC670-10520-2014 Inboard MLG Door Assembly, R/H 1 RWKKBA670-10500-28

CC670-10520-2015 Inboard MLG Door Assembly, L/H 1 RWKKBA670-10500-29

CC670-10520-2016 Inboard MLG Door Assembly, R/H 1 RWKKBA670-10500-30

CC670-10520-13 Inboard MLG Door Assembly, L/H 1 RWKKBA670-10500-31

CC670-10520-14 Inboard MLG Door Assembly, R/H 1 RWKKBA670-10500-32

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 184 of 189 Oct 12/2012 Revision E, 13 Nov/2014

PRE-SB PART NUMBER POST-SB PART NUMBER DC QTY NAME

KCC670-10900-1 Inboard MLG Door Assembly, L/H 1 RWKKBA670-10500-33

KCC670-10900-2 Inboard MLG Door Assembly, R/H 1 RWKKBA670-10500-34

KCC670-10900-3 Inboard MLG Door Assembly, L/H 1 RWKKBA670-10500-35

KCC670-10900-4 Inboard MLG Door Assembly, R/H 1 RWKKBA670-10500-36

KCC670-10900-5 Inboard MLG Door Assembly, L/H 1 RWKKBA670-10500-37

KCC670-10900-6 Inboard MLG Door Assembly, R/H 1 RWKKBA670-10500-38

KCC670-10901-1 Inboard MLG Door Assembly, L/H 1 RWKKBA670-10500-51

KCC670-10901-2 Inboard MLG Door Assembly, R/H 1 RWKKBA670-10500-52

KCC670-10901-3 Inboard MLG Door Assembly, L/H 1 RWKKBA670-10500-53

KCC670-10901-4 Inboard MLG Door Assembly, R/H 1 RWKKBA670-10500-54

CC670-10571-13 aft Member L/H 1 RWKKBA670-10500-45 CC670-10571-14 aft Member R/H 1 RWKKBA670-10500-46
CC670-10570-1 Forward Member L/H 1 RWKKBA670-10500-47

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 185 of 189 Oct 12/2012 Revision E, 13 Nov/2014

PRE-SB PART NUMBER POST-SB PART NUMBER DC QTY NAME

CC670-10570-2 Forward Member R/H 1 RWKKBA670-10500-48

CC670-10570-5 Forward Member L/H 1 RWKKBA670-10500-49

CC670-10570-6 Forward Member R/H 1 RWKKBA670-10500-50

BA670-00001-2085 MLG Fairing Assembly L/H 1 RWKKBA670-10500-300

BA670-00001-2085 MLG Fairing Assembly R/H 1 RWKKBA670-10500-350

BA670-00001-2085 MLG Fairing Assembly L/H and R/H 1 RWKKBA670-10500-3

CC670-39005-951 MLG Fairing Assembly L/H 1 RWKKBA670-10500-500

CC670-39005-951 MLG Fairing Assembly R/H 1 RWKKBA670-10500-550

CC670-39005-951 MLG Fairing Assembly L/H and R/H 1 RWKKBA670-10500-5

CC670-39005-3 MLG Fairing Assembly L/H 1 RWKKBA670-10500-700

CC670-39005-3 MLG Fairing Assembly R/H 1 RWKKBA670-10500-750

CC670-39005-3 MLG Fairing Assembly L/H and R/H 1 RWKKBA670-10500-7

CC670-39005-5 MLG Fairing Assembly L/H 1 RWKKBA670-10500-130

CC670-39005-5 MLG Fairing Assembly R/H 1 RWKKBA670-10500-135

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 186 of 189 Oct 12/2012 Revision E, 13 Nov/2014

PRE-SB PART NUMBER POST-SB PART NUMBER DC QTY NAME

CC670-39005-5 MLG Fairing Assembly L/H and R/H 1 RWKKBA670-10500-13

CC670-39019-49 MLG Fairing Assembly L/H 1 RWKKBA670-10500-190

CC670-39019-49 MLG Fairing Assembly R/H 1 RWKKBA670-10500-195

CC670-39019-49 MLG Fairing Assembly L/H and R/H 1 RWKKBA670-10500-19

CC670-39019-963 MLG Fairing Assembly L/H 1 RWKKBA670-10500-150

CC670-39019-963 MLG Fairing Assembly R/H 1 RWKKBA670-10500-155

CC670-39019-963 MLG Fairing Assembly L/H and R/H 1 RWKKBA670-10500-15

CC670-39019-965 MLG Fairing Assembly L/H 1 RWKKBA670-10500-170

CC670-39019-965 MLG Fairing Assembly R/H 1 RWKKBA670-10500-175

CC670-39019-965 MLG Fairing Assembly L/H and R/H 1 RWKKBA670-10500-17

CC670-39019-51 MLG Fairing Assembly L/H 1 RWKKBA670-10500-210

CC670-39019-51 MLG Fairing Assembly R/H 1 RWKKBA670-10500-215

CC670-39019-51 MLG Fairing Assembly L/H and R/H 1 RWKKBA670-10500-21

KBA670-39005-3 MLG Fairing Assembly L/H 1 RWKKBA670-10500-610

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 187 of 189 Oct 12/2012 Revision E, 13 Nov/2014

PRE-SB PART NUMBER POST-SB PART NUMBER DC QTY NAME

KBA670-39005-3 MLG Fairing Assembly R/H 1 RWKKBA670-10500-615

KBA670-39005-3 MLG Fairing Assembly L/H and R/H 1 RWKKBA670-10500-61

KBA670-39005-5 MLG Fairing Assembly L/H 1 RWKKBA670-10500-630

KBA670-39005-5 MLG Fairing Assembly R/H 1 RWKKBA670-10500-635

KBA670-39005-5 MLG Fairing Assembly L/H and R/H 1 RWKKBA670-10500-63

KBA670-39005-7 MLG Fairing Assembly L/H 1 RWKKBA670-10500-650

KBA670-39005-7 MLG Fairing Assembly R/H 1 RWKKBA670-10500-655

KBA670-39005-7 MLG Fairing Assembly L/H and R/H 1 RWKKBA670-10500-65

KBA670-39005-9 MLG Fairing Assembly L/H 1 RWKKBA670-10500-670

KBA670-39005-9 MLG Fairing Assembly R/H 1 RWKKBA670-10500-675

KBA670-39005-9 MLG Fairing Assembly L/H and R/H 1 RWKKBA670-10500-67

CC670-39076-1 aft Stop-Fitting L/H 1 RWKKBA670-10500-39

CC670-39076-2 aft Stop-Fitting R/H 1 RWKKBA670-10500-40

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 188 of 189 Oct 12/2012 Revision E, 13 Nov/2014

PRE-SB PART NUMBER POST-SB PART NUMBER DC QTY NAME

CC670-39245-1 Seal Retainer Forward 1 RWKForward Upper Retainer-Seal KBA670-10500-41 And Forward Lower Retainer-Seal KBA670-10500-43

CC670-39245-2 Seal Retainer Forward 1 RWKForward Upper Retainer-Seal KBA670-10500-42 And Forward Lower Retainer-Seal KBA670-10500-44

601R38119-19 Roller L/H and R/H 2 DIS CC670-10926-1
CC670-10897-1 OR CC670-10520-961 aft Seal MLG Door L/H 1 DIS CC670-10893-3
CC670-10897-2 OR CC670-10520-962 aft Seal MLG Door R/H 1 DIS CC670-10893-4
CC670-39068-1 aft Seal Fairing L/H 1 DIS

CC670-39068-2 aft Seal Fairing R/H 1 DIS

CC670-39072-1 aft Seal Retainer-Fairing L/H 1 DIS

CC670-39072-2 aft Seal Retainer-Fairing R/H 1 DIS

CC670-39078-1 OR CC670-39079-1 Shim L/H 1 DIS

### SERVICE BULLETIN 670BA---32---040

SB 670BA---32---040 Page 189 of 189 Oct 12/2012 Revision E, 13 Nov/2014

PRE-SB PART NUMBER POST-SB PART NUMBER DC QTY NAME

CC670-39077-1 aft Stop Pad MLG Fairing 2 DIS

CC670-39244-1 Seal Forward MLG Fairing L/H 1 DIS CC670-39244-5

CC670-39244-2 Seal Forward MLG Fairing R/H 1 DIS CC670-39244-6

CC670-39247-1 Seal AFT MLG Fairing L/H 1 DIS CC670-39163-1

CC670-39247-2 Seal AFT MLG Fairing R/H 1 DIS CC670-39163-2 [1] When PART C is done. [2] When PART D is done. [3] Door can be rework per PART A. [4] Door can be rework per PART B. Disposition code (DC): DIS: Discard Part. RWK: Rework part refer to this service bulletin. SAL: Salvage.

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## App A 670BA---32---040 APPENDIX A Revision A, Jul 02/2014 

## DATA SHEET

The data sheets in this appendix are given as references in the ACCOMPLISHMENT INSTRUCTIONS of Service Bulletin 670BA---32---040.

### APPENDIX A

Page A2 of A3

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1 

## App A 670BA---32---040 APPENDIX A Revision A, Jul 02/2014 OPERATOR NAME: ___________________________________________________ AIRCRAFT SERIAL NUMBER: __________________________________________ DATE (OF INSPECTION): _____________________________________________ AIRCRAFT FLIGHT CYCLES: ___________________________________________

DETAILED VISUAL INSPECTION INSPECTION AREA LEFT SIDE RIGHT SIDE MLG FAIRING: Forward stop missing Yes____ No____ Yes____ No____ Aft stop missing Yes____ No____ Yes____ No____ Forward Stop Fasteners Loose Or Missing N/A______Yes____ No____ N/A_____Yes____ No____
Aft Stop Fasteners Loose Or Missing N/A______Yes____ No____ N/A_____Yes____ No____

Edge Of The Fairing Adjacent The MLG Door Damage Yes____ No____

If Yes, Details:

_________________________

_________________________

_________________________

_________________________

_________________________Yes____ No____ If Yes, Details:

_________________________

_________________________

_________________________

_________________________

_________________________

### APPENDIX A

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## App A 670BA---32---040 APPENDIX A Revision A, Jul 02/2014 DETAILED VISUAL INSPECTION

INSPECTION AREA LEFT SIDE RIGHT SIDE MLG INBOARD DOOR: Roller (2) broken or missingBroken____Missing____ Broken____Missing____ Stop (1) Missing Yes____ No____ Yes____ No____ Stop (1) Fasteners Loose Or Missing N/A____ Yes____ No____ N/A____ Yes____ No____ Stop (3) Damage Yes____ No____ Yes____ No____ Stop (4) Damage Yes____ No____ Yes____ No____ Stop (5) Damage Yes____ No____ Yes____ No____
Edge Of The MLG Door Adjacent The Fairing Damage Yes____ No____

If Yes, Details:

_________________________

_________________________

_________________________

_________________________

_________________________Yes____ No____ If Yes, Details:

_________________________

_________________________

_________________________

_________________________

_________________________ FORWARD AND AFT SPAR AREAS: Stop (1) missing Yes____ No____ Yes____ No____ Stop (1) Fasteners Loose Or Missing N/A____ Yes____ No____ N/A____ Yes____ No____ Stop (2) missing Yes____ No____ Yes____ No____ Stop (2) Fasteners Loose Or Missing N/A____ Yes____ No____ N/A____ Yes____ No____ Wedge (3) missing Yes____ No____ Yes____ No____ Wedge (3) Fasteners Loose Or Missing N/A____ Yes____ No____ N/A____ Yes____ No____

1Page B1 of B7

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## A 670BA---32---040 APPENDIX B Revision B, Jul 02/2014 

## DATA SHEET

The data sheets in this appendix are given as references in the ACCOMPLISHMENT INSTRUCTIONS of Service Bulletin 670BA---32---040.

### APPENDIX B

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## A 670BA---32---040 APPENDIX B Revision B, Jul 02/2014 

## LEFT SIDE AIRCRAFT SERIAL NUMBER: ___________________

TABLE 1 RECORD SHEET --- MISMATCHES LOCATIONMISMATCHES BETWEEN THE LEFT MLG INBOARD DOOR AND THE FAIRING POINT ACCEPTABLE MISMATCHES MEASURED MISMATCHES PT1 ---0.200 in. (5.08 mm) to

+0.120 in. (3.05 mm) PT2 +/---0.030 in. (0.76 mm) NOTE:---0.050 in. (1.27 mm) to +0.080 (2.03 mm) for two of the five locations acceptable. PT3 PT4 PT5 PT6 PT9 ---0.030 in. (0.76 mm) to

+0.080 (2.03 mm) NOTE: ---0.050 in. (1.27 mm) to +0.100 (2.54 mm) for two of the five locations is acceptable. PT10 PT11 PT12 PT13 PT14 +/---0.120 in. (3.05 mm) PT15 ---0.070 in. (1.78 mm) to

+0.100 in. (2.54 mm) NOTE: Up to +0.150 in. (3.81 mm) for two of the five locations

is acceptable. PT16 PT17 PT18 PT19 PT20 --- 0.050 in. (1.27 mm) to

+0.100 in. (2.54 mm) PT21 PT22 PT23 PT24 No measurement is necessay N/A PT25

### APPENDIX B

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## A 670BA---32---040 APPENDIX B Revision B, Jul 02/2014 

## LEFT SIDE AIRCRAFT SERIAL NUMBER: ___________________ TABLE 2 RECORD SHEET --- CLEARANCES CHECK LOCATION CLEARANCE BETWEEN THE LEFT MLG INBOARD DOOR AND THE FAIRING POINT ACCEPTABLE

CLEARANCE MEASURED CLEARANCE MATERIAL

TO BE REMOVED PT1 0.275 to 0.425 in.

(6.99 to 10.80 mm) PT2 0.050 to 0.200 in.

(1.27 to 5.08 mm) NOTE: Up to 0.250 in. (6.35mm) for one of the five location is acceptable PT3 PT4 PT5 PT6 PT7 PT8 PT9 0.050 to 0.200 in.

(1.27 to 5.08 mm) PT10 PT11 PT12 PT13 PT14 0.100 to 0.200 in.

(2.54 to 5.08 mm) PT15 0.100 to 0.200 in.

(2.54 to 5.08 mm) NOTE: Up to 0.250 in. (6.35mm) for one of the five location is acceptable PT16 PT17 PT18 PT19 PT20 0.650 to 0.800 in.

(16.51 to 20.32 mm) PT21 0.850 to 1.000 in.

(21.59 to 25.4 mm) PT22 0.440 to 0.590 in.

(11.18 to 14.99 mm) PT23 PT24 0.750 to 0.900 in.

(19.05 to 22.86 mm) PT25 0.550 to 0.700 in.

(13.97 to 17.78 mm)

### APPENDIX B

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## A 670BA---32---040 APPENDIX B Revision B, Jul 02/2014 

## LEFT SIDE AIRCRAFT SERIAL NUMBER: ___________________

TABLE 3 RECORD SHEET --- OVERLAP CHECK LOCATION SEAL OVERLAP ON THE LEFT MLG INBOARD DOOR POINT MINIMUM OVERLAP FOR THE

FORWARD SEAL SEAL OVERLAP MEASUREMENT
PT20 0.250 in. (6.3 mm) PT21 0.250 in. (6.3 mm) PT22 0.250 in. (6.3 mm) PT23 0.250 in. (6.3 mm) RECORD SHEET --- OVERLAP CHECK LOCATION OVERLAP ON THE LEFT MLG INBOARD DOOR Figure 17 View C---C MINIMUM OVERLAP BETWEEN

THE AFT STOP FITTING AND THE MLG DOOR STOP FITTINGOVERLAP MEASUREMENT OF THE STOP FITTING 0.600 in. (15.2 mm)

### APPENDIX B

Page B5 of B7

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## A 670BA---32---040 APPENDIX B Revision B, Jul 02/2014 

## RIGHT SIDE AIRCRAFT SERIAL NUMBER: ___________________

TABLE 1 RECORD SHEET --- MISMATCHES LOCATION MISMATCHES BETWEEN THE RIGHT MLG INBOARD DOOR AND THE FAIRING POINT ACCEPTABLE MISMATCHES MEASURED MISMATCHES PT1 ---0.200 in. (5.08 mm) to

+0.120 in. (3.05 mm) PT2 +/---0.030 in. (0.76 mm)

NOTE:---0.050 in. (1.27 mm) +0.080 (2.03 mm) for two of the five locations acceptable. PT3 PT4 PT5 PT6 PT9 ---0.030 in. (0.76 mm) to

+0.080 (2.03 mm) NOTE: ---0.050 in. (1.27 mm) to +0.100 (2.54 mm) for two of the five locations is acceptable. PT10 PT11 PT12 PT13 PT14 +/---0.120 in. (3.05 mm) PT15 ---0.070 in. (1.78 mm) to

+0.100 in. (2.54 mm) NOTE: Up to +0.150 in. (3.81 mm) for two of the five locations

is acceptable. PT16 PT17 PT18 PT19 PT20 --- 0.050 in. (1.27 mm) to

+0.100 in. (2.54 mm) PT21 PT22 PT23 PT24 No measurement is necessay N/A PT25

### APPENDIX B

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## A 670BA---32---040 APPENDIX B Revision B, Jul 02/2014 

## RIGHT SIDE AIRCRAFT SERIAL NUMBER: ___________________ TABLE 2 RECORD SHEET --- CLEARANCES CHECK LOCATIONCLEARANCE BETWEEN THE RIGHT MLG INBOARD DOOR AND THE FAIRING POINT ACCEPTABLE

CLEARANCE MEASURED CLEARANCE MATERIAL

TO BE REMOVED PT1 0.275 to 0.425 in.

(6.99 to 10.80 mm) PT2 0.050 to 0.200 in.

(1.27 to 5.08 mm) NOTE: Up to 0.250 in. (6.35mm) for one of the five location is acceptable PT3 PT4 PT5 PT6 PT7 PT8 PT9 0.050 to 0.200 in.

(1.27 to 5.08 mm) PT10 PT11 PT12 PT13 PT14 0.100 to 0.200 in.

(2.54 to 5.08 mm) PT15 0.100 to 0.200 in.

(2.54 to 5.08 mm) NOTE: Up to 0.250 in. (6.35mm) for one of the five location is acceptable PT16 PT17 PT18 PT19 PT20 0.650 to 0.800 in.

(16.51 to 20.32 mm) PT21 0.850 to 1.000 in.

(21.59 to 25.4 mm) PT22 0.440 to 0.590 in.

(11.18 to 14.99 mm) PT23 PT24 0.750 to 0.900 in.

(19.05 to 22.86 mm) PT25 0.550 to 0.700 in.

(13.97 to 17.78 mm)

### APPENDIX B

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## A 670BA---32---040 APPENDIX B Revision B, Jul 02/2014 

## RIGHT SIDE AIRCRAFT SERIAL NUMBER: ___________________

TABLE 3 RECORD SHEET --- OVERLAP CHECK LOCATION SEAL OVERLAP ON THE RIGHT MLG INBOARD DOOR POINT MINIMUM OVERLAP FOR THE

FORWARD SEAL SEAL OVERLAP MEASURMENT
PT20 0.250 in. (6.3 mm) PT21 0.250 in. (6.3 mm) PT22 0.250 in. (6.3 mm) PT23 0.250 in. (6.3 mm)

RECORD SHEET --- OVERLAP CHECK LOCATION OVERLAP ON THE RIGHT MLG INBOARD DOOR Figure 17 View C---C MINIMUM OVERLAP BETWEEN

THE AFT STOP FITTING AND THE MLG DOOR STOP FITTINGOVERLAP MEASURMENT OF THE STOP FITTING 0.600 in. (15.2 mm)

1THANK YOU FOR YOUR COMMENTS



## SERVICE BULLETIN FEEDBACK FORM/COMPLIANCE SHEET (YOUR COMMENTS HELP US WRITE BETTER SERVICE BULLETINS)

Service Bulletin No.: Revision: Aircraft Serial Number: Date:

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Operator: Service Centre: Name: Telephone or Fax: FAX your comments or feedback to (450) 476---7300 or e-mail tocrj_sb_evaluation_form@aero.bombardier.com