SB A670BA ---32---030 Page 1 of 1 Aug 06/2013 

## SERVICE BULLETIN REVISION TRANSMITTAL SHEET

ALERT SERVICE BULLETIN A670BA ---32 ---030

SUBJECT: Landing Gear --- Main Landing Gear (MLG) and Doors --- Inspection of the MLG Inboard Doors and MLG Fairing This page transmits: Revision D of Service Bulletin A670BA --- 32 --- 030, dated Aug 06/2013 and Revision B of Appendix A, dated Mar 13/2013
For aircraft that have done a previous issue of this service bulletin, refer to the time compliance section.

Reason: Revised Planning Information, paragraph 1., to: Change and add some statements in the time compliance paragraph 1. D. Change the revision of the RSI and the modification summary in the references paragraph. Revised Accomplishment Instructions, paragraph 2., to: Add steps in PART A. Change some effectivit y statements in PART E. This revision also includes small editorial changes that do not have an effect on the technical content.

Instructions: Discard the copy of Service Bulletin A670BA --- 32 --- 030, Revision C, dated Mar 13/ 2013. Replace with the copy attached. Service Bulletin History: Initial issue, dated Oct 18/2010. Revision A, dated Oct 22/2010. Revision B, dated Nov 03/2011. Revision C, dated Mar 13/2013. 1SB A670BA ---32---030 Page 1 of 56 Oct 18/2010 Revision D, Aug 06/2013 

# ALERT 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: A670BA ---32 ---030 SUBJECT: Landing Gear --- Main Landing Gear (MLG) and Doors --- Inspection of the MLG Inboard Doors and MLG Fairing

1. PLANNING INFORMATION A. Effectivity (1) Aircraft Affected:

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.

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 2 of 56 Oct 18/2010 Revision D, Aug 06/2013 B. Reason (1) Condition During the retraction phase, the left and/or the right MLG inboard door can travel past the internal metallic stiffener in the MLG fairing seal of the MLG fairing. If this occurs, it is possible for the MLG inboard door to get caught on the MLG fairing and prevent the full extension of the MLG when it is selected down. (2) Evidence One left and one right MLG-up landings occurred on in-service aircraft. (3) Objective/Benefit This service bulletin gives the procedure to do a detailed visual inspection of the MLG inboard doors, MLG fairing and adjacent structure of the MLG inboard doors. This service bulletin also gives the procedure to replace the damaged MLG fairing seal(s) and to do the clearance check of the MLG door or, if necessary, to remove and/or install a MLG door. C. Description This service bulletin is divided into six parts: PART A, PART C, PART D, PART E, PART F and PART G. PART A --- Inspection of the MLG Inboard Doors, and MLG Fairing and Adjacent Structure A detailed visual inspection of the MLG inboard doors, MLG fairing and MLG inboard-door adjacent structure is done. If a MLG fairing seal on the MLG fairing has damage, PART C, PART E, PART F, and/or PART G, of this service bulletin are done. If there is damage on a MLG inboard door, the MLG inboard door is repaired and/or the Customer Response Center (CRC) is called for a disposition and/or PART C of the service bulletin is done. If there is damage on the MLG fairing and/or the roller, and/or missing fasteners from the stops or wedge, the MLG fairing is repaired and/or the CRC is called for a disposition.

PART B IS NO LONGER APPLICABLE
PART C --- Removal of the MLG Inboard Door(s) Circuit breakers are opened. The MLG inboard door(s) is/are removed. The circuit breakers are closed.

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 3 of 56 Oct 18/2010 Revision D, Aug 06/2013 For aircraft that have incorporated PART C of this service bulletin PART D --- Installation of the MLG Inboard Door(s) Circuit breakers are opened. The MLG inboard door(s) is/are installed. The circuit breakers are closed. The clearance check of the MLG door(s) is done. PART A of this service bulletin is done. For aircraft that have damage or not on the MLG fairing seal P/N CC670 ---39244 ---1 and/or P/N CC670 ---39244 ---2 of the MLG fairing PART E --- Replacement of the MLG fairing seals P/N CC670 ---39244 ---1 and CC670 ---39244 ---2 with P/N CC670 ---39244 ---5 and CC670 ---39244 ---6 on the MLG Fairing For aircraft that replacing the seals because of damage Circuit breakers are opened. The aircraft is put on jacks. The two MLG fairing seals are replaced. The clearance check on the MLG inboard door is done. The aircraft is removed from jacks. The circuit breakers are closed. For aircraft that have no damage on the seals The two MLG fairing seals are replaced.
For aircraft that have damage on the left MLG fairing seal P/N CC670 ---39244 ---5 of the MLG Fairing PART F --- Replacement of the left MLG fairing seal P/N CC670 ---39244 ---5 on the MLG Fairing The MLG and NLG safety pins are installed. The LH MLG fairing seal is replaced. The MLG and NLG safety pins are removed..
For aircraft that have damage on the right MLG fairing seal P/N CC670 ---39244 ---6 of the MLG Fairing PART G --- Replacement of the right MLG fairing seal P/N CC670 ---39244 ---6 on the MLG Fairing The MLG and NLG safety pins are installed. The right MLG fairing seal is replaced. The MLG and NLG safety pins are removed.

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 4 of 56 Oct 18/2010 Revision D, Aug 06/2013 D. Compliance

Alert Service Bulletin. Bombardier Aerospace recommends that this service bulletin be done as shown in the tables below, unless otherwise directed by the airworthiness authority of the operator: NOTE: PART A, PART C, PART E, PART F and PART G referred in the tables below refer to PART A, PART C, PART E, PART F and PART G of this service bulletin.
For Aircraft 10002 thru 10313, 15001 thru 15238, and 15240 thru 15255 that have rubber seal P/N CC670 ---39244 ---1 and CC670 ---39244 ---2 installed


### TABLE A
COMPLIANCE RESULT INSTRUCTIONS REPEATED INSPECTION

INTERVAL

Do PART A of this service bulletin at no more than 50 flight cycles from the initial release date on this service bulletin. If no damage is found. None See note ¡ below. If the MLG inboard door(s) is/are installed, do PART A at intervals of 200 flight hours from the initial inspection date. Or Not necessary if the two MLG inboard doors are removed (PART C). OR

PART E to be done before next flight. If the MLG inboard door(s) is/are installed, refer to TABLE B for details. Or Not necessary if the two MLG inboard doors are removed (PART C). OR

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 5 of 56 Oct 18/2010 Revision D, Aug 06/2013 COMPLIANCE REPEATED INSPECTION

INTERVAL INSTRUCTIONS RESULT

Do PART A of this service bulletin at no more than 50 flight cycles from the initial release date on this service bulletin. If damage is found on the MLG fairing seal(s). If damage is found on the left and/or the right MLG fairing seal(s), PART E to be done before next flight And/Or If necessary, removal of the left and/or the right MLG inboard door(s) (PART C) to be done before next flight. See note © below. See note ¡ below. If PART E is incorporated and the MLG inboard door(s) is/are installed, refer to TABLE B for details. Or If only one of the fairing seals is damage, if only the related MLG inboard door is removed (PART C) and, if PART E is not incorporated, do PART A at intervals of 200 flight hours from the initial inspection date. Or Not necessary if the two MLG inboard doors are removed (PART C). AND/OR

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 6 of 56 Oct 18/2010 Revision D, Aug 06/2013 COMPLIANCE REPEATED INSPECTION

INTERVAL INSTRUCTIONS RESULT

Do PART A of this service bulletin at no more than 50 flight cycles from the initial release date on this service bulletin. If damage is found on the MLG inboard door(s) The damage is repaired. And/Or Disposition from the CRC to be incorporated before next flight. And/Or If necessary, removal of the left and/or the right MLG inboard door(s) (PART C) to be done before next flight. See note © below. See note ¡ below. If PART E is incorporated and the MLG inboard door(s) is/are installed, refer to TABLE B for details. Or If PART E is not incorporated and the MLG inboard door(s) is/are installed, do PART A at intervals of 200 flight hours from the initial inspection date. Or Not necessary if the two MLG inboard doors are removed (PART C). AND/OR

If damage is found on the fairing and/or if damage is found on the stops and/or the wedge (installed on the forward and/or the aft spars). The damage is repaired. And/Or Disposition from the CRC to be incorporated on the fairing before next flight. See note ¡ below. If PART E is incorporated and the MLG inboard door(s) is/are installed, refer to TABLE B for details. Or If PART E is not incorporated and the MLG inboard door(s) is/are installed, do PART A at intervals of 200 flight hours from the initial inspection date. Or Not necessary if the two MLG inboard doors are removed (PART C).

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 7 of 56 Oct 18/2010 Revision D, Aug 06/2013 COMPLIANCE REPEATED INSPECTION

INTERVAL INSTRUCTIONS RESULT 

### ¡ For aircraft that have had the initial issue, Revision A and/or Revision B of this service bulletin incorporated, it is necessary to do the subsequent inspection as follows.For aircraft that have the inspection scheduled in less than 200 flight hours, the inspection must be done at the scheduled 600 flight hours. Subsequent inspections must be done as shown in TABLE A.For aircraft that have the inspection scheduled in 200 flight hours or more, the inspection must be done at no more than 200 flight hours from the release date of Revision C of this service bulletin. Subsequent inspections must be done as shown in TABLE A. 

### © When PART C is done, make sure that the aircraft agrees with the Configuration Deviation List (CDL) of the AFM, for flying without inboard MLG inboard door(s).

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 8 of 56 Oct 18/2010 Revision D, Aug 06/2013 COMPLIANCE CONDITION OF AIRCRAFT INSTRUCTIONS REPEATED INSPECTION

INTERVAL

Do PART E of this service bulletin at no more than 2500 flight hours or one year, from the release date of Revision C of this service bulletin, whichever comes first. If the two MLG inboard doors are installed If the left and/or the right MLG door is/are installed, PART A and PART E to be done before next flight And If necessary, removal of the left or the right MLG inboard door (PART C) to be done before next flight. See note © below. If the left and/or the right MLG inboard door is/are installed, refer to TABLE B for details.

Or Remove the left and the right doors (PART C) to be done before next flight. See note © below. Not necessary if the two MLG inboard doors are removed (PART C). OR

If one MLG inboard door is removed If the left or the right MLG door is installed, PART A and PART E to be done before next flight. And/Or If necessary, removal of the second MLG inboard door (PART C) to be done before next flight. See note © below. If the left or the right MLG inboard door is installed, refer to TABLE B for details. Or Not necessary if the two MLG inboard doors are removed (PART C).
OR

If the two MLG inboard doors are removed. At the installation of the left and/or the right MLG inboard door(s), PART A and PART E to be done before next flight. If the MLG inboard door(s) is/are installed, refer to TABLE B for details. Or Not necessary if the two MLG inboard doors are removed (PART C). 

### © When PART C is done, make sure that the aircraft agrees with the Configuration Deviation List (CDL) of the AFM, for flying without inboard MLG inboard door(s).

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 9 of 56 Oct 18/2010 Revision D, Aug 06/2013 For Aircraft 10314 thru 10333, 15239, and 15256 thru 15284 that have the rubber seal P/N CC670 ---39244 ---1 and CC670 ---39244 ---2 installed 

### TABLE A
COMPLIANCE RESULT INSTRUCTIONS REPEATED INSPECTION

INTERVAL

Do PART A of this service bulletin at no more than 200 flight hours from the initial release date on this service bulletin. If no damage is found. None See note ¡ below. If the MLG inboard door(s) is/are installed, do PART A at intervals of 200 flight hours from the initial inspection date. Or Not necessary if the two MLG inboard doors are removed (PART C). OR

PART E to be done before next flight. If the MLG inboard door(s) is/are installed, refer to TABLE B for details. Or Not necessary if the two MLG inboard doors are removed (PART C). OR

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 10 of 56 Oct 18/2010 Revision D, Aug 06/2013 COMPLIANCE REPEATED INSPECTION

INTERVAL INSTRUCTIONS RESULT

Do PART A of this service bulletin at no more than 200 flight hours from the initial release date on this service bulletin. If damage is found on the MLG fairing seal(s). If damage is found on the left and/or the right MLG fairing seal(s), PART E to be done before next flight And/Or If necessary, removal of the left and/or the right MLG inboard door(s) (PART C) to be done before next flight. See note © below. See note ¡ below. If PART E is incorporated and the MLG inboard door(s) is/are installed, refer to TABLE B for details. Or If only one of the fairing seals is damage, if only the related MLG inboard door is removed (PART C) and, if PART E is not incorporated, do PART A at intervals of 200 flight hours from the initial inspection date. Or Not necessary if the two MLG inboard doors are removed (PART C). AND/OR

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 11 of 56 Oct 18/2010 Revision D, Aug 06/2013 COMPLIANCE REPEATED INSPECTION

INTERVAL INSTRUCTIONS RESULT

Do PART A of this service bulletin at no more than 200 flight hours from the release date on this service bulletin If damage is found on the MLG inboard door(s) The damage is repaired. And/Or Disposition from the CRC to be incorporated before next flight. And/Or If necessary, removal of the left and/or the right MLG inboard door(s) (PART C) to be done before next flight. See note © below. See note ¡ below. If PART E is incorporated and the MLG inboard door(s) is/are installed, refer to TABLE B for details. Or If PART E is not incorporated and the MLG inboard door(s) is/are installed, do PART A at intervals of 200 flight hours from the initial inspection date. Or Not necessary if the two MLG inboard doors are removed (PART C). AND/OR

If damage is found on the fairing and/or if damage is found on the stops and/or the wedge (installed on the forward and/or the aft spars). The damage is repaired. And/Or Disposition from the CRC to be incorporated on the fairing before next flight. See note ¡ below. If PART E is incorporated and the MLG inboard door(s) is/are installed, refer to TABLE B for details. Or If PART E is not incorporated and the MLG inboard door(s) is/are installed, do PART A at intervals of 200 flight hours from the initial inspection date. Or Not necessary if the two MLG inboard doors are removed (PART C).

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 12 of 56 Oct 18/2010 Revision D, Aug 06/2013 COMPLIANCE REPEATED INSPECTION

INTERVAL INSTRUCTIONS RESULT 

### ¡ For aircraft that have had the initial issue, Revision A and/or Revision B of this service bulletin incorporated, it is necessary to do the subsequent inspection as follows.For aircraft that have the inspection scheduled in less than 200 flight hours, the inspection must be done at the scheduled 600 flight hours. Subsequent inspections must be done as shown in TABLE A.For aircraft that have the inspection scheduled in 200 flight hours or more, the inspection must be done at no more than 200 flight hours from the release date of Revision C of this service bulletin. Subsequent inspections must be done as shown in TABLE A. 

### © When PART C is done, make sure that the aircraft agrees with the Configuration Deviation List (CDL) of the AFM, for flying without inboard MLG inboard door(s).

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 13 of 56 Oct 18/2010 Revision D, Aug 06/2013 COMPLIANCE CONDITION OF AIRCRAFT INSTRUCTIONS REPEATED INSPECTION

INTERVAL

Do PART E of this service bulletin at no more than 2500 flight hours or one year, from the release date of Revision C of this service bulletin, whichever comes first. If the two MLG inboard doors are installed If the left and/or the right MLG door is/are installed, PART A and PART E to be done before next flight And If necessary, removal of the left or the right MLG inboard door (PART C) to be done before next flight. See note © below. If the left and/or the right MLG inboard door is/are installed, refer to TABLE B for details.

Or Remove the left and the right doors (PART C) to be done before next flight. See note © below. Not necessary if the two MLG inboard doors are removed (PART C). OR

If one MLG inboard door is removed If the left or the right MLG door is installed, PART A and PART E to be done before next flight. And/Or If necessary, removal of the second MLG inboard door (PART C) to be done before next flight. See note © below. If the left or the right MLG inboard door is installed, refer to TABLE B for details. Or Not necessary if the two MLG inboard doors are removed (PART C).
OR

If the two MLG inboard doors are removed. At the installation of the left and/or the right MLG inboard door(s), PART A and PART E to be done before next flight. If the MLG inboard door(s) is/are installed, refer to TABLE B for details. Or Not necessary if the two MLG inboard doors are removed (PART C). 

### © When PART C is done, make sure that the aircraft agrees with the Configuration Deviation List (CDL) of the AFM, for flying without inboard MLG inboard door(s).

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 14 of 56 Oct 18/2010 Revision D, Aug 06/2013 For Aircraft 10002 thru 10333, 15001 thru 15284, that have rubber seals P/N CC670 ---39244 ---5 and CC670 ---39244 ---6 installed (PART E) 

### TABLE B
COMPLIANCE RESULT INSTRUCTIONS REPEATED INSPECTION

INTERVAL

Do PART A of this service bulletin at no more than 600 flight hoursfrom the installation of the seals CC670---39244 ---5 and CC670---39244 ---6 (PART E). If no damage is found. None If the MLG inboard door(s) is/are installed, do PART A at intervals of 600 flight hours from the initial inspection date. Or Not necessary if the two MLG inboard doors are removed (PART C). OR

If damage is found on the left and/or the right MLG fairing seal(s). If the left MLG fairing seal is damaged, PART F to be done before next flight And/or If the right MLG fairing seal is damaged, PART G to be done before next flight And/or If necessary, the removal of the leftand/or the right MLG inboard door(s) (PART C) to be done before next flight. See note ¡ below. If the MLG inboard door(s) is/are installed, do PART A at intervals of 600 flight hours from the initial inspection date. Or Not necessary if the two MLG inboard doors are removed (PART C).

AND/OR

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 15 of 56 Oct 18/2010 Revision D, Aug 06/2013 COMPLIANCE REPEATED INSPECTION

INTERVAL INSTRUCTIONS RESULT

Do PART A of this service bulletin at no more than 600 flight hoursfrom the installation of the seals CC670---39244 ---5 and CC670---39244 ---6 (PART E). If damage is found on the left and/or the right MLG inboard door(s). The damage is repaired And/Or Disposition from the CRC to be incorporated on the leftand/or the right MLG inboard door(s) before next flight And/Or If necessary, the leftand/or the right MLG inboard door(s) to be removed (PART C) See note ¡ below. If the MLG inboard door(s) is/are installed, do PART A at intervals of 600 flight hours from the initial inspection date. Or Not necessary if the two doors are removed.

AND/OR If damage is found on the fairing and/or if damage is found on the stops and/or the wedge (installed on the forward and/or the aft spars). The damage is repaired And/Or Disposition from the CRC to be incorporated before next flight. If the MLG inboard door(s) is/are installed, do PART A at intervals of 600 flight hours from the initial inspection date. Or Not necessary if the two doors are removed. ¡ When PART C is done, make sure that the aircraft agrees with the Configuration Deviation List (CDL) of the AFM, for flying without inboard MLG door(s).

For aircraft that have incorporated PART C of this service bulletin PART D of this service bulletin can be done at the discretion of the operator.
For Aircraft that have rubber seals P/N CC670 ---39244 ---1 and CC670 ---39244 ---2 installed When PART D of this service bulletin is done, it is necessary to do PART A before next flight. It is also necessary to do PART A at intervals of 200 flight hours from the incorporation date of PART D of this service bulletin.

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 16 of 56 Oct 18/2010 Revision D, Aug 06/2013 OR For Aircraft that have rubber seals P/N CC670 ---39244 ---5 and CC670 ---39244 ---6 installed When PART D and PART E of this service bulletin are done. It is necessary to do PART A before next flight. It is also necessary to do PART A at intervals of 600 flight hours from the incorporation date of PART D of this service bulletin. For all aircraft NOTE: It is not necessary to do this service bulletin if Service Bulletin 670BA ---32---040, Landing Gear --- Main Landing Gear and Doors --- Increase Clearances Between Fairing and Main-Landing-Gear Doors, is done. 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. ---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.

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 17 of 56 Oct 18/2010 Revision D, Aug 06/2013 PART A It will take an estimated 1.25 man-hours to complete PART A of this service bulletin. The man-hours are divided as shown in the table that follows:
TASK MAN-HOURS (1) Job Set-Up 0.25 (2) Procedure 0.75 (3) Test N/A (4) Job Close-Out 0.25

PART C It will take an estimated 2.0 man-hours to complete PART C of this service bulletin. The man-hours are divided as shown in the table that follows:
TASK MAN-HOURS (1) Job Set-Up 0.5 (2) Procedure 1.0 (3) Test N/A (4) Job Close-Out 0.5

NOTE: The man-hours for the procedure are for one MLG door only. An additional 1.0 man-hour is necessary to remove a second MLG door.

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 18 of 56 Oct 18/2010 Revision D, Aug 06/2013 PART D It will take an estimated 8.0 man---hours to complete PART D of this service bulletin. The man---hours are divided as shown in the table that follows:
TASK MAN-HOURS (1) Job Set-Up 1.5 (2) Procedure 3.0 (3) Test 2.0 (4) Job Close-Out 1.5

NOTE: The man-hours for the procedure are for one MLG door only. An additional 1.0 man-hour is necessary to install a second MLG door. PART E It will take an estimated 10.0 man-hours to complete PART E of this service bulletin. The man-hours are divided as shown in the table that follows:
TASK MAN-HOURS (1) Job Set-Up 1.5 (2) Procedure 3.0 (3) Test 4.0 (4) Job Close-Out 1.5

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 19 of 56 Oct 18/2010 Revision D, Aug 06/2013 PART F It will take an estimated 2.0 man-hours to complete PART F of this service bulletin. The man-hours are divided as shown in the table that follows:
TASK MAN-HOURS (1) Job Set-Up 0.5 (2) Procedure 1.0 (3) Test N/A (4) Job Close-Out 0.5

PART G It will take an estimated 2.0 man-hours to complete PART G of this service bulletin. The man-hours are divided as shown in the table that follows:
TASK MAN-HOURS (1) Job Set-Up 0.5 (2) Procedure 1.0 (3) Test N/A (4) Job Close-Out 0.5

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 20 of 56 Oct 18/2010 Revision D, Aug 06/2013 G. Material --- Price and Availability (1) The parts in the table that follows are necessary to do PART E or PART F or PART G of this service bulletin and are available from Bombardier Commercial Aircraft.

PART NUMBER NAME QTY

MS21043---08 Nut, Self Locking Nut 28
(2) The kits in the tables that follow are necessary to do PART E or PART F or PART G of this service bulletin and are available from Bombardier Commercial Aircraft. NOTE: For a list of kit contents, refer to paragraph 3.A. For PART E or PART F

KIT NUMBER NAME 670BA32040K5 Left Fairing Forward Seal

For PART E or PART G

KIT NUMBER NAME 670BA32040K6 Right Fairing Forward Seal
(3) Please send a purchase order to the address below to schedule part 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.

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 21 of 56 Oct 18/2010 Revision D, Aug 06/2013 (4) Refer to paragraph 3.B. for a list of consumables for this service bulletin. H. Tooling --- Price and Availability There are no tool kits for this service bulletin. Refer to paragraph 3.C. for a list of special tools and equipment for this service bulletin. I. Weight and Balance The weight and balance data will change if PART C, PART D or PART E is incorporated: For aircraft that have had PART C or PART D of this service bulletin incorporated Refer to the Configuration Deviation List in Chapter 8 of the Airplane Flight Manual (AFM) for the weight and balance data.
For aircraft that have had PART E of this service bulletin incorporated
For CL ---600 ---2C10 aircraft

WEIGHT ARM MOMENT ¡ 0.1 lb 800.3 in. 0.080 ( 1000 lb-in.) 0.05 kg 20.33 m 0.0009 (1000 kg-m) ¡ The value in the Moment column is divided by 1000. Refer to Weight and Balance Manual CSP A ---041.

For CL ---600 ---2D15 and CL ---600 ---2D24 aircraft

WEIGHT ARM MOMENT ¡ 0.1 lb 890.3 in. 0.089 ( 1000 lb-in.) 0.05 kg 22.61 m 0.0010 (1000 kg-m) ¡ The value in the Moment column is divided by 1000. Refer to Weight and Balance Manual CSP A ---041.

J. Electrical Load Data Not changed.

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 22 of 56 Oct 18/2010 Revision D, Aug 06/2013 K. References Restriction and/or Special Instruction (RSI) C ---32---1330---00, Revision H Modification Summary 670T014111, Revision A ---1 Aircraft Maintenance Manual (AMM) Airplane Flight Manual (AFM) Nondestructive Testing Manual (NDTM) Refer to the SB Introduction document for definition or explanation of Service Bulletin content. For Bombardier reference only: PCA 74397 L. Other Publications Affected Aircraft Maintenance Manual (AMM) Aircraft illustrated Parts Catalogue (AIPC) M. Relationship Chart

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

BA670---00001---2085 Fairing Assembly, MLG KBA670---39005---3 Assembly Fairing MLG
CC670---39005---951 Fairing Assembly, MLG KBA670---39005---5 Assembly Fairing MLG
CC670---39005---3 Fairing Assembly, MLG KBA670---39005---7 Assembly Fairing MLG
CC670---39005---5 Fairing Assembly, MLG KBA670---39005---9 Assembly Fairing MLG

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 23 of 56 Oct 18/2010 Revision D, Aug 06/2013 2. ACCOMPLISHMENT INSTRUCTIONS PART A --- Inspection of the MLG Inboard Doors, MLG Fairing and Adjacent Structure Reference Information
REFERENCE DESIGNATION AMM 12---00---00---867---801 Standard Aircraft Configuration for Maintenance NDT 51---20---009---210 Visual --- Inspection Procedures SRM 52---82---02---201---001 Doors, Main Landing Gear --- Repairs SRM 53---00---00---201---002 General Non---Metallic Composite - Repairs A. Job Set-Up (1) Make sure that the aircraft is in standard configuration for maintenance (refer to AMM 12---00---00---867---801). 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. (2) Make sure that the MLG lockpins are installed.
B. Procedure NOTE: This procedure is applicable to the left and the right sides. The procedure that follows is written for the left side. The differences are given. NOTE: It is necessary to do the inspection of the MLG fairing seal(s) and the MLG inboard door(s) on the installed left and/or the right MLG door(s). (1) Make sure to record all the results of the visual inspection in the Appendix A. (2) Do a detailed visual inspection of the MLG fairing seal (1) or (2) of the MLG fairing (as applicable) as follows: Refer to Figure 1 and Figure 2. (a) Do a detailed visual inspection of the MLG fairing seal (1) of the MLG fairing as follows:
1 Examine the MLG fairing seal (1) for signs of damage such as cracks or tears in the material (fabric/rubber).

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 24 of 56 Oct 18/2010 Revision D, Aug 06/2013 2 With your fingers, move the MLG fairing seals (1) near the area of the metallic stiffener to find damage such as cracks, cuts, and/or tears in the material of the MLG fairing seal (1). NOTE: Damage includes cracks, cuts or tears that possibly do not go completely through the thickness of the MLG fairing seal (1). 3 Record the results in Appendix A Refer to Figure 1. (b) Do a detailed visual inspection of the MLG fairing seal (2) of the MLG fairing as follows:
1 Examine the MLG fairing seal (2) for signs of cuts or damages in the material base. NOTE: For the MLG fairing seal (2) exterior low friction polyester fabric is not part of the base rubber material rejection criteria. 2 Record the results in Appendix A Refer to Figure 3 and Figure 4. (3) Do a detailed visual inspection of the MLG inboard doors as follows: NOTE: For this inspection, damage does not include surface scratches and/or paint deterioration. (a) Look for a missing or broken roller (2) on the MLG inboard door. (b) Look for missing stops (1) and (3). (c) Look for loose or missing fasteners from the stops (1) and (3). (d) Look for damage on the stops (4) and (5) and the adjacent area. (e) Look for loose or missing fasteners from the stops (4) and (5). (f) Look for damage along the edge of the MLG inboard door adjacent to the MLG fairing. Refer to the shaded area in Figure 4. (g) Record the results in Appendix A

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 25 of 56 Oct 18/2010 Revision D, Aug 06/2013 Refer to Figure 5 and Figure 6. (4) Do a detailed visual inspection of the MLG fairing as follows: NOTE: For this inspection, damage does not include surface scratches and/or paint deterioration. (a) Look for missing forward and/or aft stops from the MLG fairing. (b) Look for loose or missing fasteners from the forward and aft stops. (c) Look for damage along the edge of the MLG fairing adjacent to the MLG inboard door. Refer to the shaded area in Figure 6. (d) Record the results in Appendix A Refer to Figure 7. (5) Do a detailed visual inspection of the stops (1) and (2) and wedge (3) on the forward and aft spars as follows: NOTE: For this inspection, damage does not include surface scratches and paint deterioration. (a) Look for missing stops (1) and (2). (b) Look for loose or missing fasteners from the stops (1) and (2). (c) Look for a missing wedge (3). (d) Look for loose or missing fasteners from the wedge (3). (e) Record the results in Appendix A (6) If there is no damage, go to the Job Close-Out. Refer to Figure 1. (7) If the MLG fairing seal (1) is damaged. Do PART C, or PART E of this service bulletin. (8) If the MLG fairing seal (2) is damaged. Do PART F and/or PART G or PART C of this service bulletin. (9) If there is no damage on the MLG fairing seal (1) or (2), go to the next step.

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 26 of 56 Oct 18/2010 Revision D, Aug 06/2013 Refer to Figure 6. (10) If there is damage along the edge of the MLG fairing, if possible, repair the MLG fairing (refer to SRM 53-00-00-201-002). If it is not possible to repair the MLG fairing, speak with a representative of Bombardier at the CRC at phone number 514-855-8500 for a disposition. (11) If there is no damage along the edge of the MLG fairing adjacent to the MLG inboard door, go to next step. Refer to Figure 5. (12) If there is damage or if there is missing parts from the forward and the aft stops of the fairing, replace the missing and/or the damaged parts of the stops, and do the clearance check of the applicable MLG inboard door (refer to AMM 32---12---01---220---801). (13) If it is not possible to repair the forward and/or the aft stops on the MLG fairing, speak with a representative of Bombardier at the CRC at phone number 514---855---8500 for a disposition. (14) If there is no missing or damaged parts from the forward and/or aft stops on the MLG fairing, go to the next step. Refer to Figure 7. (15) If there is missing or damaged parts from the stops (1) and (2) and/or from the wedge (3) of the forward and aft spars, replace missing/damaged parts, and do the clearance check of the applicable MLG inboard door (refer to AMM 32-12-01-220-801). (16) If it is not possible to repair the stops (1) and/or (2) and/or the wedge (3), speak with a representative of Bombardier at the CRC at phone number 514-855-8500 for a disposition. (17) If there is no missing or damaged parts from the stops (1) and (2) and/or from the wedge (3) on the forward and aft spars, go to the next step. Refer to Figure 3 and Figure 4. (18) If the MLG inboard door has damage, if possible, repair the MLG inboard door (refer to SRM 52-82-02-201-001). If it is not possible to repair the MLG inboard door, speak with a representative of Bombardier at the CRC at phone number 514-855-8500 for a disposition or do PART C of this service bulletin. (19) If there is no damage on the MLG inboard door, go to the Job Close-Out.

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 27 of 56 Oct 18/2010 Revision D, Aug 06/2013 C. Job Close-Out (1) Remove all tools, equipment, and unwanted materials from the work area. (2) When PART A of this service bulletin is completed, make this entry in the applicable logbook(s): ”Alert Service Bulletin A670BA ---32---030, Revision D, Landing Gear --- Main Landing Gear (MLG) and Doors --- Inspection of the MLG Inboard Doors and MLG Fairing, PART A, incorporated.”

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 28 of 56 Oct 18/2010 Revision D, Aug 06/2013 Inspection of the MLG Fairing Seals Figure 1 (Sheet 1 of 2)ba6796a01.cgm, sc, 15 jan 2013 C

B A A

C

B 1 OR 2

MLG FAIRING (REF) 1 OR 2 LEGEND 1. MLG forward seal CC670--39244--1 (LH) CC670--39244--2 (RH). 2. MLG forward seal CC670--39244--5 (LH) CC670--39244--6 (RH).

NOTE Left side shown. right side opposite.

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 29 of 56 Oct 18/2010 Revision D, Aug 06/2013 Inspection of the MLG Fairing Seals Figure 1 (Sheet 2 of 2)ba6796a02.cgm, sc, 15 jan 2013 B D

D

LOOKING INBOARD 0.6 in. (15.24mm) (REF)

0.1 in. (2.54 mm) (REF)
METALLIC STIFFENER (REF)

1

MLG FAIRING (REF) NOTE Left side shown. right side opposite. LEGEND 1. MLG forward seal CC670--39244--1 (LH) CC670--39244--2 (RH).

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 30 of 56 Oct 18/2010 Revision D, Aug 06/2013 Example of Damage to the MLG Fairing Seal Figure 2 (Sheet 1 of 2)ba6797a01.cgm A

A B

B MLG FAIRING (REF) 1

LEGEND 1. Forward rubber seal CC670--39244--1 (CC670--39244--2).

NOTE Left side shown. right side opposite.

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 31 of 56 Oct 18/2010 Revision D, Aug 06/2013 Example of Damage to the MLG fairing seal Figure 2 (Sheet 2 of 2)ba6797a02.cgm A C

D C D

MLG FAIRING (REF) 1

LEGEND 1. Forward rubber seal CC670--39244--1 (CC670--39244--2).

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 32 of 56 Oct 18/2010 Revision D, Aug 06/2013 Inspection of the Stops on the MLG Inboard Door Figure 3 (Sheet 1 of 2)ba6804a01.cgm, rb, 11 oct 2010

B A B

1 A

2 LEGEND 1. Stop. 2. Roller.

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

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 33 of 56 Oct 18/2010 Revision D, Aug 06/2013 Inspection of the Stops on the MLG Inboard Door Figure 3 (Sheet 2 of 2)ba6804a02.cgm, rb, 11 oct 2010 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.

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 34 of 56 Oct 18/2010 Revision D, Aug 06/2013 Inspection of the MLG Inboard Door Figure 4 (Sheet 1 of 2)ba6800a01.cgm, fp/rb, 11 oct 2010

A A

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

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 35 of 56 Oct 18/2010 Revision D, Aug 06/2013 Inspection of the MLG Inboard Door Figure 4 (Sheet 2 of 2)ba6800a02.cgm, fp/rb, 11 oct 2010 A

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

MLG INBOARD DOOR (REF)

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 36 of 56 Oct 18/2010 Revision D, Aug 06/2013 Inspection of the Stops on the MLG Fairing Figure 5 (Sheet 1 of 1)ba6802a01.cgm B MLG FAIRING (REF)

AFT STOP (REF) A C A

MLG FAIRING (REF) MLG FAIRING (REF)

FWD STOP (REF) B

NOTE Left side shown, right side opposite.

FASTENER (REF) FASTENER (REF) C

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 37 of 56 Oct 18/2010 Revision D, Aug 06/2013 Inspection of the MLG Fairing Figure 6 (Sheet 1 of 1)ba6801a01.cgm, fp/rb, 11 oct 2010 A

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

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 38 of 56 Oct 18/2010 Revision D, Aug 06/2013 Inspection of the Stops and Wedge Figure 7 (Sheet 1 of 2)ba6803a01.cgm
B NOTE Left side shown, right side opposite. LEGEND 1. Stop. FWD LOWER SKIN (REF) A B A

1

FASTENER (REF)

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 39 of 56 Oct 18/2010 Revision D, Aug 06/2013 Inspection of the Stops and Wedge Figure 7 (Sheet 2 of 2)ba6803a02.cgm 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)

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 40 of 56 Oct 18/2010 Revision D, Aug 06/2013 MLG Fairing Seals and Seal Retainer --- Removal/Installation Figure 9 (Sheet 1 of 1)ba7704a01.cgm, sc,mgr,cr. 05 apr. 2013 A

A B

NOTE Left side shown. right side opposite. 4 OR 6

2 3 5

1

6

1 2 3 5 LEGEND 1. Bolt NAS7502U4. 2. Nut MS21043--08. 3. Washer NAS1149EN832P. 4. Seal MLG fairing CC670--39244--1 (LH) CC670--39244--2 (RH). 5. Seal retainer CC670--39245--1 (LH) CC670--39245--2 (RH). 6. Seal MLG fairing CC670--39244--5 (LH) CC670--39244--6 (RH). 7. MLG fairing BA670--00001--2085 (PRE--MOD) KBA670--39005--3 (POST--MOD) or CC670--39005--951 (PRE--MOD) KBA670--39005--5 (POST--MOD) or CC670--39005--3 (PRE--MOD) KBA670--39005--7 (POST--MOD) or CC670--39005--5 (PRE--MOD) KBA670--39005--9 (POST--MOD).

B POST--MOD B PRE--MOD

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 41 of 56 Oct 18/2010 Revision D, Aug 06/2013 PART C --- Removal of MLG Inboard Door (s)
Reference Information
REFERENCE DESIGNATION AMM 12---00---00---867---801 Standard Aircraft Configuration for Maintenance AMM 32---12---01---000---802 Removal of the MLG Inboard Doors D. Job Set-Up (1) Make sure that the aircraft is in standard configuration for maintenance (refer to AMM 12---00---00---867---801). 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. (2) Make sure that the MLG and NLG lockpins are installed. (3) 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 G1 PSEU CH A 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 ---2 P1 PSEU CH A CBP ---2 P2 PSEU CH B CBP ---2 LOWER S1 HEATERS STATIC L

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 42 of 56 Oct 18/2010 Revision D, Aug 06/2013 CB PANEL NAME CB NO. CBP ---2 LOWER S2 HEATERS ADS CONT 1 CBP ---2 LOWER S3 HEATERS ADS CONT STBY

E. Procedure (1) Remove the applicable MLG inboard door(s) (refer to AMM 32---12---01---000---802). F. Job Close-Out (1) Remove all tools, equipment, and unwanted materials from the work area. (2) 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 G1 PSEU CH A 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 ---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 (3) When PART C of this service bulletin is completed, make this entry in the applicable logbook(s): ”Alert Service Bulletin A670BA ---32---030, Revision D, Landing Gear --- Main Landing Gear (MLG) and Doors --- Inspection of the MLG Inboard Doors and MLG Fairing, PART C, incorporated.”

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 43 of 56 Oct 18/2010 Revision D, Aug 06/2013 PART D --- Installation of MLG Inboard Door(s)
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 12---00---00---867---801 Standard Aircraft Configuration for Maintenance AMM 32---12---01---220---801 Clearance Check of the MLG Doors AMM 32---12---01---400---802 Installation of the MLG Inboard Doors AMM 53---83---85---000---803 Removal of the Main Landing Gear (MLG) Fairing (194AB) Forward Seal AMM 53---83---85---400---803 Installation of the Main Landing Gear (MLG) Fairing (194AB) Forward Seal G. Job Set-Up (1) Make sure that the aircraft is in standard configuration for maintenance (refer to AMM 12---00---00---867---801). 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. (2) Make sure that the MLG and NLG lockpins are installed. (3) 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 G1 PSEU CH A CBP ---1 G13 HEATERS ADS CONT 2

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 44 of 56 Oct 18/2010 Revision D, Aug 06/2013 CB PANEL NAME CB NO. 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 ---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
(4) Put the aircraft on jacks (refer to AMM 07---11---01---582---801).

H. Procedure (1) Install the applicable MLG inboard door(s) (refer to AMM 32---12---01---400---802). (2) Do PART A of this service bulletin. (3) Do the clearance check of the applicable MLG inboard door(s) (AMM 32---12---01---220---801). (4) If an adjustment of a MLG inboard door is necessary and you cannot get a correct adjustment of the MLG door, speak with a representative of Bombardier at the CRC at phone number 514---855---8500 for a disposition.

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 45 of 56 Oct 18/2010 Revision D, Aug 06/2013 I. Job Close-Out (1) Remove all tools, equipment, and unwanted materials from the work area. (2) Remove the aircraft from jacks (refer to AMM 07---11---01---586---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 G1 PSEU CH A 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 ---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
(4) When PART D of this service bulletin is completed, make this entry in the applicable logbook(s): ”Alert Service Bulletin A670BA ---32---030, Revision D, Landing Gear --- Main Landing Gear (MLG) and Doors --- Inspection of the MLG Inboard Doors and MLG Fairing, PART D, incorporated.”

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 46 of 56 Oct 18/2010 Revision D, Aug 06/2013 PART E --- Replacement of the MLG fairing seals P/N CC670 ---39244 ---1 and CC670 ---39244 ---2 with P/N CC670 ---39244 ---5 and CC670 ---39244 ---6 on the MLG Fairing
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 12---00---00---867---801 Standard Aircraft Configuration for Maintenance AMM 20---21---00---910---801 Torquing of Threaded Fasteners AMM 32---12---01---220---801 Clearance Check of the MLG Doors AMM 53---83---85---000---803 Removal of the Main Landing Gear (MLG) Fairing (194AB) Forward Seal 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---41---02---001---001 Bolts, Screws and Related Items J. Job Set-Up (1) Make sure that the aircraft is in standard configuration for maintenance (refer to AMM 12---00---00---867---801). 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. (2) Make sure that the MLG and NLG lockpins are installed.

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 47 of 56 Oct 18/2010 Revision D, Aug 06/2013 For aircraft that must have the left and/or the right damaged fairing seal(s) replaced and that the left and/or the right MLG inboard door(s) is (are) installed on that same side (3) 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 G2 NOSE STEER 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 G2 NOSE STEER CBP ---2 N6 ADG DEPLOY AUTO CBP ---2 LOWER S1 HEATERS STATIC L CBP ---5 B10 ENG IGN B

(4) Put the aircraft on jacks (refer to AMM 07---11---01---582---801).

K. Procedure For all aircraft Refer to Figure 9. NOTE: This procedure is applicable to the left and the right sides. The procedure that follows is written for the left side. The differences are given. (1) Remove the MLG fairing seal (4) from the MLG fairing (refer to AMM 53---83---85---000---803).

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 48 of 56 Oct 18/2010 Revision D, Aug 06/2013 (2) Backdrill the MLG fairing seal (6) on the MLG fairing as follows: (a) Temporary install and secure the MLG fairing seal (6) to the retainer seal (5). (b) Backdrill the holes to a diameter of 0.165 to 0.169 in. (4.19 to 4.29 mm) from the seal retainer (5) through the MLG fairing seal (6) (c) Remove the MLG fairing seal (6) from the seal retainer (5). (d) Remove the burrs from the MLG fairing seal (6). (3) Install the MLG fairing seal (6) on the MLG fairing as follows: (a) Install the MLG fairing seal (6) with the retainer seal (5) on the MLG fairing. (b) With sealant, wet-install the bolt (8) through the MLG fairing and the MLG faring seal (Refer to AMM 51---23---00---390---810). (c) With sealant, wet-install the bolts (1) through the MLG fairing with the washers (3) and the nuts (2) (Refer to AMM 51---23---00---390---810). (d) Torque the nuts (2) and the screw (8) (refer to AMM 20---21---00---910---801). (e) Clean the area of the forward MLG fairing with clean, dry cloths with no lint, moist with aliphatic naphta or equivalent. (f) Dry the area with clean, dry cloths with no lint. (g) If necessary, apply primer CMS565---01 on the bolts (1), the nuts (2) and the washers (3) (refer to SRM 51---25---06---001---001). (h) If necessary, apply two layers of polyurethane topcoat CMS 565---02, color grey No.16473 on the nuts (2) and the washers (3) (refer to SRM 51---25---16---001---001). (i) If necessary, apply polyurethane topcoat CMS 565---02 on the bolts (1) to agree with the external paint scheme of the aircraft (refer to SRM 51---25---16---001---001).

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 49 of 56 Oct 18/2010 Revision D, Aug 06/2013 (4) With a indelible ink pen or equivalent, identify the MLG fairing (7) 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---39005---3 CC670---39005---951 KBA670---39005---5

CC670---39005---3 KBA670---39005---7 CC670---39005---5 KBA670---39005---9 For aircraft that had the damaged fairing seal(s) replaced and that the MLG inboard door(s) is(are) installed on that same side (5) Do the clearance check on the applicable MLG door(s) (refer to AMM 32---12---01---220---801). (6) If an adjustment of the MLG inboard door(s) is necessary and you cannot get a correct adjustment of the MLG door(s), speak with a representative of Bombardier at the CRC at phone number 514---855---8500 for a disposition. L. Job Close-Out For all aircraft (1) Remove all tools, equipment, and unwanted materials from the work area. For aircraft that had the damaged seal(s) replaced and that the MLG inboard door(s) is(are) installed on that same side (2) Remove the aircraft from jacks (refer to AMM 07---11---01---586---801).

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 50 of 56 Oct 18/2010 Revision D, Aug 06/2013 (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 G2 NOSE STEER 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 G2 NOSE STEER CBP ---2 N6 ADG DEPLOY AUTO CBP ---2 LOWER S1 HEATERS STATIC L CBP ---5 B10 ENG IGN B

For all aircraft (4) When PART E 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 “Alert Service Bulletin A670BA ---32---030, Revision D, PART E, incorporated.” (5) When PART E of this service bulletin is completed, make this entry in the applicable logbook(s): ”Alert Service Bulletin A670BA ---32---030, Revision D. Landing Gear --- Main Landing Gear (MLG) and Doors --- Inspection of the MLG Inboard Doors and MLG Fairing, PART E, incorporated.”

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 51 of 56 Oct 18/2010 Revision D, Aug 06/2013 PART F --- Replacement of the left MLG fairing seal P/N CC670 ---39244 ---5 on the MLG Fairing Reference Information
REFERENCE DESIGNATION AMM 12---00---00---867---801 Standard Aircraft Configuration for Maintenance AMM 20---21---00---910---801 Torquing of Threaded Fasteners 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---41---02---001---001 Bolts, Screws and Related Items M. Job Set-Up (1) Make sure that the aircraft is in standard configuration for maintenance (refer to AMM 12---00---00---867---801). 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. (2) Make sure that the MLG and NLG lockpins are installed.

N. Procedure Refer to Figure 9. (1) Remove the MLG fairing seal (6) from the MLG fairing (refer to AMM 53---83---85---000---803). (2) Backdrill the MLG fairing seal (6) on the MLG fairing as follows: (a) Temporary install and secure the MLG fairing seal (6) to the retainer seal (5).

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 52 of 56 Oct 18/2010 Revision D, Aug 06/2013 (b) Backdrill the holes to a diameter of 0.165 to 0.169 in. (4.19 to 4.29 mm) from the seal retainer (5) through the MLG fairing seal (6) (c) Remove the MLG fairing seal (6) from the seal retainer (5). (d) Remove the burrs from the MLG fairing seal (6). (3) Install the MLG fairing seal (6) on the MLG fairing as follows: (a) Install the MLG fairing seal (6) with the retainer seal (5) on the MLG fairing. (b) With sealant, wet-install the bolt (8) through the MLG fairing and the MLG faring seal (Refer to AMM 51---23---00---390---810). (c) With sealant, wet-install the bolts (1) through the MLG fairing with the washers (3) and the nuts (2) (Refer to AMM 51---23---00---390---810). (d) Torque the nuts (2) and the screw (8) (refer to AMM 20---21---00---910---801). (e) Clean the area of the forward MLG fairing with clean, dry cloths with no lint, moist with aliphatic naphta or equivalent. (f) Dry the area with clean, dry cloths with no lint. (g) If necessary, apply primer CMS565---01 on the bolts (1), the nuts (2) and the washers (3) (refer to SRM 51---25---06---001---001). (h) If necessary, apply two layers of polyurethane topcoat CMS 565---02, color grey No.16473 on the nuts (2) and the washers (3) (refer to SRM 51---25---16---001---001). (i) If necessary, apply polyurethane topcoat CMS 565---02 on the bolts (1) to agree with the external paint scheme of the aircraft (refer to SRM 51---25---16---001---001). O. Job Close-Out (1) Remove all tools, equipment, and unwanted materials from the work area. (2) When PART F of this service bulletin is completed, make this entry in the applicable logbook(s): ”Alert Service Bulletin A670BA ---32---030, Revision D, Landing Gear --- Main Landing Gear (MLG) and Doors --- Inspection of the MLG Inboard Doors and MLG Fairing, PART F, incorporated.”

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 53 of 56 Oct 18/2010 Revision D, Aug 06/2013 PART G --- Replacement of the right MLG fairing seal P/N CC670 ---39244 ---6 on the MLG Fairing Reference Information
REFERENCE DESIGNATION AMM 12---00---00---867---801 Standard Aircraft Configuration for Maintenance AMM 20---21---00---910---801 Torquing of Threaded Fasteners 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---41---02---001---001 Bolts, Screws and Related Items P. Job Set-Up (1) Make sure that the aircraft is in standard configuration for maintenance (refer to AMM 12---00---00---867---801). 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. (2) Make sure that the MLG and NLG lockpins are installed.
Q. Procedure Refer to Figure 9. (1) Remove the MLG fairing seal (6) from the MLG fairing (refer to AMM 53---83---85---000---803). (2) Backdrill the MLG fairing seal (6) on the MLG fairing as follows: (a) Temporary install and secure the MLG fairing seal (6) to the retainer seal (5).

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 54 of 56 Oct 18/2010 Revision D, Aug 06/2013 (b) Backdrill the holes to a diameter of 0.165 to 0.169 in. (4.19 to 4.29 mm) from the seal retainer (5) through the MLG fairing seal (6) (c) Remove the MLG fairing seal (6) from the seal retainer (5). (d) Remove the burrs from the MLG fairing seal (6). (3) Install the MLG fairing seal (6) on the MLG fairing as follows: (a) Install the MLG fairing seal (6) with the retainer seal (5) on the MLG fairing. (b) With sealant, wet-install the bolt (8) through the MLG fairing and the MLG faring seal (Refer to AMM 51---23---00---390---810). (c) With sealant, wet-install the bolts (1) through the MLG fairing with the washers (3) and the nuts (2) (Refer to AMM 51---23---00---390---810). (d) Torque the nuts (2) and the bolt (8) (refer to AMM 20---21---00---910---801). (e) Clean the area of the forward MLG fairing with clean, dry cloths with no lint, moist with aliphatic naphta or equivalent. (f) Dry the area with clean, dry cloths with no lint. (g) If necessary, apply primer CMS565---01 on the bolts (1), the nuts (2) and the washers (3) (refer to SRM 51---25---06---001---001). (h) If necessary, apply two layers of polyurethane topcoat CMS 565---02, color grey No.16473 on the nuts (2) and the washers (3) (refer to SRM 51---25---16---001---001). (i) If necessary, apply polyurethane topcoat CMS 565---02 on the bolts (1) to agree with the external paint scheme of the aircraft (refer to SRM 51---25---16---001---001). R. Job Close-Out (1) Remove all tools, equipment, and unwanted materials from the work area. (2) When PART G of this service bulletin is completed, make this entry in the applicable logbook(s): ”Alert Service Bulletin A670BA ---32---030, Revision D, Landing Gear --- Main Landing Gear (MLG) and Doors --- Inspection of the MLG Inboard Doors and MLG Fairing, PART G, incorporated.”

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 55 of 56 Oct 18/2010 Revision D, Aug 06/2013 3. MATERIAL INFORMATION A. Kit Information Kit Contents:
KIT 670BA32040K5

PART NUMBER QTY NAME ALTERNATE PARTS NOTES
CC670---39244---5SB 1 Seal, MLG fairing (L/H) CC670---39244---5---01

---

KIT 670BA32040K6
PART NUMBER QTY NAME ALTERNATE PARTS NOTES
CC670---39244---6SB 1 Seal, MLG fairing (R/H) CC670---39244---6---01

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B. Consumable Information For a list of consumables, refer to the different tasks given as references in this service bulletin. C. Special Tools and Equipment For a list of special tools and equipment, refer to the different tasks given as references in this service bulletin. D. Disposition of Parts The table that follows shows the disposition of parts on the aircraft, and the relationship between these parts to the new parts to be installed through the incorporation of PART E of this service bulletin .

PRE-SB PART NUMBER NAME QTY DC POST-SB PART NUMBER
CC670---39244---1 Seal, MLG Door (L/H) 1 DIS CC670---39244---5

CC670---39244---2 Seal, MLG Door (R/H) 1 DIS CC670---39244---6

### ALERT SERVICE BULLETIN A670BA ---32 ---030

SB A670BA ---32---030 Page 56 of 56 Oct 18/2010 Revision D, Aug 06/2013 PRE-SB PART NUMBER POST-SB PART NUMBER DC QTY NAME

BA670---00001---2085 Fairing Assembly, MLG 1 RWK KBA670---39005---3

CC670---39005---951 Fairing Assembly, MLG 1 RWK KBA670---39005---5

CC670---39005---3 Fairing Assembly, MLG 1 RWK KBA670---39005---7

CC670---39005---5 Fairing Assembly, MLG 1 RWK KBA670---39005---9
Disposition code (DC): DIS: Discard Part. RWK: Rework part as shown in this service bulletin. 1Page A1 of A2 Oct 18/2010 Revision B, Mar 13/2013 1 

## App A APPENDIX A 

## APPENDIX A

Alert Service Bulletin A670BA -- 32 -- 030 Inspection of the MLG Inboard Doors and MLG Fairings

DATA SHEET

The data sheet contained in this appendix are given as references in the ACCOMPLISHMENT INSTRUCTIONS of Service Bulletin A670---32---030

### APPENDIX A

Page A2 of A2 Oct 18/2010 Revision B, Mar 13/2013 1 

## App A APPENDIX A OPERATOR NAME: ___________________________________________________ AIRCRAFT SERIAL NUMBER: __________________________________________ DATE (OF INSPECTION): _____________________________________________ AIRCRAFT FLIGHT HOURS: ___________________________________________
Left MLG Door Right MLG Door Inspection Results (Findings) Forward Rubber

Seal Damage YES

____ 

 YES

____ NO

____ Door Part Number Serial Number

Please include Pictures ____________________________

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____________________________ Pictures and data will be used by Bombardier for analysis Send Data Sheet to: BOMBARDIER REGIONAL AIRCRAFT Customer Response Center (CRC) FAX: 514---855---8501 Attention to : ISE Systems or Email ‘: thd.crj@aero.bombardier.com

1THANK YOU FOR ANSWERING THIS EVALUATION FORM UPON COMPLETION OF THIS EVALUATION FORM/COMPLIANCE SHEET, FAX TO 450-476-7300 

### SERVICE BULLETIN EVALUATI ON FORM/COMPLIANCE SHEET (YOUR IDEAS WILL HELP US PROVIDE BETTER BULLETINS)

SERVICE BULLETIN : 670BA-32-030 ISSUE: D

STRONGLY DISAGREE NEUTRAL AGREE STRONGLY DISAGREE AGREE
 Instructions to do the Service Bulletin were accurate. Comments: 

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 Illustration(s), figure(s), picture(s) and/or kit drawing(s) were helpful to carry out instructions. Comments: 

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 If a parts kit was required, did the kit contents received agree with the contents listed in the bulletin? Comments: 

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 Aircraft hands-on work was accomplished in estimated time. Comments: 

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 Overall, I was satisfied with this Service Bulletin. Comments: 

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PLEASE SUPPLY US WITH THE FOLLOWING DATA AND FAX TO (450) 476-7300:
OPERATOR: NAME (Please print) SERVICE CENTER: TELEPHONE: AIRCRAFT SERIAL NO.: FACSIMILE: DATE OF SB INCORPOARTION