SB 670BA ---32---042

Page 1 of 1

Jul 02/2014

SERVICE BULLETIN

REVISION TRANSMITTAL SHEET

SERVICE BULLETIN 670BA ---32 ---042

SUBJECT: Landing Gear --- Main Landing Gear Door and Mechanism System ---

Inspection of the Inboard Main Landing Gear (MLG) Doors P/N

CC670-10520-3, -4, -951, -952, -2003, -2004, -2005, -2006, -2013, -2014,

-2015, -2016, KBA670-10500-27, -28, -29, -30, -35, -36, -37, -38, and

KCC670-10900-3, -4, -5, -6

This Page transmit:

Revision A of Service Bulletin 670BA --- 32 --- 042, dated Jul 02/2014

and

Appendix A, dated Nov 05/2013 and Appendix B, dated Nov 05/2013

The changes in this revision have no effect on aircraft that have had

this service bulletin incorporated.

Reason:

Revised Planning Information, paragraph 1., to:

Change and add actions to be taken in the time compliance.

Revised Accomplishment Instructions, paragraph 2., to:

Change and add an action to be taken in Paragraph 2 (B) Procedure (6) (b).

Instructions:

Discard the copy of Service Bulletin 670BA --- 32 --- 042, dated Nov 05/2013. Replace with

the copy attached.

Service Bulletin History:

Initial issue, dated Nov 05/2013

1
SB 670BA-32-042

Page 1 of 12

Nov 05/2013

Revision A, Jul 02/2014

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: 32-12 NUMBER: 670BA-32-042

SUBJECT: Landing Gear --- Main Landing Gear Door and Mechanism System ---

Inspection of the Inboard Main Landing Gear (MLG) Doors P/N

CC670-10520-3, -4, -951, -952, -2003, -2004, -2005, -2006, -2013, -2014,

-2015, -2016, KBA670-10500-27, -28, -29, -30, -35, -36, -37, -38, and

KCC670-10900-3, -4, -5, -6

1. PLANNING INFORMATION

A. Effectivity

(1) Aircraft with the components that follow installed:

PART NUMBER:

CC670-10520-3, CC670-10520-4,

CC670-10520-951, CC670-10520-952,

CC670-10520-2003, CC670-10520-2004,

CC670-10520-2005, CC670-10520-2006,

CC670-10520-2013, CC670-10520-2014,

CC670-10520-2015, CC670-10520-2016,

KBA670-10500-27, KBA670-10500-28,

KBA670-10500-29, KBA670-10500-30,

KBA670-10500-35, KBA670-10500-36,

KBA670-10500-37, KBA670-10500-38,

KCC670-10900-3, KCC670-10900-4,

KCC670-10900-5, KCC670-10900-6

PART SERIAL

NUMBER:

All
SERVICE BULLETIN 670BA-32-042

SB 670BA-32-042

Page 2 of 12

Nov 05/2013

Revision A, Jul 02/2014

ON CL-600-2C10

AIRCRAFT THAT

HAVE HAD SB

670BA-32-017

AND/OR SB

670BA-32-040

INCORPORATED

OR INSTALLED AT

THE TIME OF

DELIVERY ON

CL-600-2C10 WITH

SERIAL NUMBERS:

10002 thru 10111 [1]

SPARES:

Examine all spare parts. If a part with a part

number listed above is found, it is necessary

to incorporate this service bulletin.

ALL CL-600-2C10

AIRCRAFT

If parts with the part numbers listed above

are installed on aircraft, but were not

identified at the time of delivery, on the same

aircraft model, it is necessary to incorporate

this service bulletin.

PRODUCTION: [1] There is no production effectivity.

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) and

Supplemental Type Approvals (STAs) or equivalent action changes

to make sure you can complete this service bulletin.
SERVICE BULLETIN 670BA-32-042

SB 670BA-32-042

Page 3 of 12

Nov 05/2013

Revision A, Jul 02/2014

B. Reason

(1) Condition

It is possible to have damage on the inboard MLG door(s) P/N

CC670-10520-3, -4, -951, -952, -2003, -2004, -2005, -2006, -2013, -2014,

-2015, -2016, KBA670-10500-27, -28, -29, -30, -35, -36, -37, -38, and

KCC670-10900-3, -4, -5, -6. This can cause the inboard MLG door(s) to break

and disconnect from the aircraft.

(2) Evidence

Twelve inboard MLG door forward-members were found cracked on in-service

CL-600-2C10 aircraft.

(3) Objective/Benefit

This service bulletin gives the procedure to do a visual inspection of the left

and the right inboard MLG doors, and if applicable, to repair the inboard MLG

doors.

C. Description

A general and a detailed visual inspection of the left and the right inboard MLG

doors is done. If necessary, the damaged inboard MLG door(s) is/are replaced,

removed or repaired.

D. Compliance

Recommended service bulletin.

Bombardier recommends that this service bulletin be done at no more than 600

flight hours from the release date of this service bulletin, unless otherwise directed

by the airworthiness authority of the operator.

Bombardier recommends that this service bulletin be repeated at intervals of 600

flight hours from the initial inspection date, until service bulletin 670BA-32-043 is

done, unless otherwise directed by the airworthiness authority of the operator.

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:
SERVICE BULLETIN 670BA-32-042

SB 670BA-32-042

Page 4 of 12

Nov 05/2013

Revision A, Jul 02/2014

- 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 e-mail at

thd.crj@aero.bombardier.com.

It will take an estimated1.5 man-hours to complete this service bulletin. The

man-hours are divided in the table that follows:

TASK MAN-HOURS

(1) Job Set-Up 0.25

(2) Procedure 1.00

(3) Test N/A

(4) Job Close-Out 0.25

NOTE: The man-hours for the procedure do not include the hours to repair and

or replace damaged parts.

G. Material --- Price and Availability

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

Not changed.
SERVICE BULLETIN 670BA-32-042

SB 670BA-32-042

Page 5 of 12

Nov 05/2013

Revision A, Jul 02/2014

J. Electrical Load Data

Not changed.

K. References

Refer to the SB Introduction document for definition or explanation of service

bulletin content

Restriction and/or Special Instruction (RSI) C-32-1580-00 Rev B

Aircraft Maintenance Manual (AMM)

Structural Repair Manual (SRM)

Nondestructive Testing Manual (NDTM)

For Bombardier reference only: PCA 75521

L. Other Publications Affected

None.

M. Relationship Chart

Not applicable.
SERVICE BULLETIN 670BA-32-042

SB 670BA-32-042

Page 6 of 12

Nov 05/2013

Revision A, Jul 02/2014

2. ACCOMPLISHMENT INSTRUCTIONS

Reference Information

REFERENCE DESIGNATION

AMM 12-00-00-867-801 Standard Aircraft Configuration for Maintenance

AMM 32-12-01-000-802 Removal of the Inboard MLG Doors

AMM 32-12-01-400-802 Installation of the Inboard MLG Doors

NDTM 51-20-009-210, Part 1 Visual - Inspection Procedures

SRM 51-26-00-001-001 Cleaning

SRM 52-82-02-201-001 Doors, Main Landing Gear - 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).

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.

Refer to Figure 1.

(1) Do a general visual inspection of the inboard MLG door inner skins (1) and

(2), the outer skin (3), and the forward member (4) as follows

(refer to NDTM 51-20-009-210, Part 1):

(a) Make sure that you do not clean the inboard MLG door at this time.

(b) Inspect for signs of deformation, pulled or missing fasteners on the inner

skin (1), where it attaches to the cross member and on the inner skin (2),

where it attaches to the forward member, as shown in the shaded areas

in Figure 1, Views A and B.

(c) Inspect for signs of deformation, pulled or missing fasteners on the outer

skin (3), where it attaches to the cross member and where it attaches to

the forward member, as shown in the shaded area in Figure 1, View C.
SERVICE BULLETIN 670BA-32-042

SB 670BA-32-042

Page 7 of 12

Nov 05/2013

Revision A, Jul 02/2014

(d) Inspect for signs of cracks and/or deformation on the forward member

(4) as shown in the shaded area in Figure 1, View D.

NOTE: Refer to APPENDIX A for examples of damage.

(2) Record the results of the inspections on the data sheet in APPENDIX B.

(3) Clean the inboard MLG door with clean, dry, lint-free cloths moist with

isopropyl alcohol at the locations shown in the shaded areas in Figure 1,

Views A, B, C, and D (refer to SRM 51-26-00-001-001).

(4) Do a detailed visual inspection of the inboard MLG door inner skins (1) and

(2), the outer skin (3), and the forward member (4) as follows

(refer to NDTM 51-20-009-210, Part 1):

NOTE: Make sure that you use a sufficient source of lighting.

(a) Push the inboard MLG door to the end of its travel limit. Keep it in this

position and do the steps that follow:

1 Inspect for signs of deformation, pulled or missing fasteners on the

inner skin (1), where it attaches to the cross member and on the

inner skin (2), where it attaches to the forward member, as shown

in the shaded areas in Figure 1, Views A and B.

2 Inspect for signs of deformation, pulled or missing fasteners on the

outer skin (3), where it attaches to the cross member and forward

member, as shown in the shaded area in Figure 1, View C.

3 Inspect for signs of cracks and/or deformation on the forward

member (4) as shown in the shaded area in Figure 1, View D.

NOTE: Refer to APPENDIX A for examples of damage.

(b) Pull the inboard MLG door to the end of its travel limit. Keep it in this

position and do the steps that follow:

1 Inspect for signs of deformation, pulled or missing fasteners on the

inner skin (1), where it attaches to the cross member and on the

inner skin (2), where it attaches to the forward member as shown in

the shaded areas in Figure 1, View A and B.
SERVICE BULLETIN 670BA-32-042

SB 670BA-32-042

Page 8 of 12

Nov 05/2013

Revision A, Jul 02/2014

2 Inspect for signs of deformation, pulled or missing fasteners on the

outer skin (3), where it attaches to the cross member and forward

member, as shown in the shaded area in Figure 1, View C.

3 Inspect for signs of cracks and/or deformation on the forward

member (4) as shown in the shaded area in Figure 1, View D.

NOTE: Refer to APPENDIX A for examples of damage.

(5) Record the results of the inspection on the data sheet in APPENDIX B.

(6) If damage is found on the inboard MLG door, do as follows:

(a) If damage is found on the inner skin(s) (1) and/or (2), and/or the outer

skin (3), do as follows:

1 If necessary, remove the damaged inboard MLG door

(refer to AMM 32-12-01-000-802).

2 If it is possible, repair the inboard MLG door

(refer to SRM 52-82-02-201-001).

3 If it is not possible to repair the inboard MLG door, speak with a

representative of Bombardier at the Technical Help Desk at phone

number 514-855-8500 for a disposition for the inboard MLG door

or do service bulletin 670BA-32-043.

4 If removed and repaired, install the inboard MLG door

(refer to AMM 32-12-01-400-802).

(b) If damage is found on the forward member (4), do service bulletin

670BA-32-043.

(7) If no damage is found on the inboard MLG door, go to the Job Close-Out.

C. Job Close ---Out

(1) Remove all tools, equipment, and unwanted materials from the work area.

(2) When this service bulletin is completed, make this entry in the applicable

logbooks: “Service Bulletin 670BA-32-042, Revision A, Landing Gear - Main

Landing Gear Door and Mechanism System - Inspection of the Inboard Main

Landing Gear (MLG) Doors P/N CC670-10520-3, -4, -951, -952, -2003, -2004,

-2005, -2006, -2013, -2014, -2015, -2016, KBA670-10500-27, -28, -29, -30, -35,

-36, -37, -38, and KCC670-10900-3, -4, -5, -6, incorporated.”
SERVICE BULLETIN 670BA-32-042

SB 670BA-32-042

Page 9 of 12

Nov 05/2013

Revision A, Jul 02/2014

Inspection Locations of the Inboard MLG Doors

Figure 1 (Sheet 1 of 3)

A

ba7023a03.cgm, sd 28--aout--2013

A

CROSS

MEMBER

(REF)

INBOARD MLG

DOOR (REF)

1

FORWARD

MEMBER

(REF)

B

B

FORWARD

MEMBER

(REF)

2

LEGEND

1. Inner skin.

2. Inner skin.

NOTES

1.

2.

3.

Left side shown,

right side opposite.

Inspection areas

are shaded.

Outboard MLG door

not shown for clarity.
SERVICE BULLETIN 670BA-32-042

SB 670BA-32-042

Page 10 of 12

Nov 05/2013

Revision A, Jul 02/2014

Inspection Locations of the Inboard MLG Doors

Figure 1 (Sheet 2 of 3)

ba8023a04.cgm, sd, 28--aout--2013

CROSS

MEMBER

(REF) FORWARD

MEMBER

(REF)

INBOARD MLG

DOOR (REF)

C

A

C

3

LEGEND

3. Outer skin.

NOTES

1.

2.

3.

Left side shown,

right side opposite.

Inspection area

is shaded.

Outboard MLG door

not shown for clarity.
SERVICE BULLETIN 670BA-32-042

SB 670BA-32-042

Page 11 of 12

Nov 05/2013

Revision A, Jul 02/2014

Inspection Locations of the Inboard MLG Doors

Figure 1 (Sheet 3 of 3)

ba7023a05.cgm, sd 28--aout--2013

A

CROSS

MEMBER

(REF)

4

INBOARD MLG

DOOR (REF)

D

D

LEGEND

4. Forward member.

NOTES

1.

2.

3.

Left side shown,

right side opposite.

Inspection area

is shaded.

Outboard MLG door

not shown for clarity.
SERVICE BULLETIN 670BA-32-042

SB 670BA-32-042

Page 12 of 12

Nov 05/2013

Revision A, Jul 02/2014

3. MATERIAL INFORMATION

A. Kit Information

None.

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

There are no special tools and equipment for this service bulletin.

D. Disposition of Parts

Not applicable.

1
APPENDIX A

Page A1 of A3

Nov 05/2013

APPENDIX A

SERVICE BULLETIN 670BA-32-042

EXAMPLES OF DAMAGE ON THE

INBOARD MLG DOOR FORWARD MEMBER

The data sheet contained in this appendix is given as references in the

ACCOMPLISHMENT INSTRUCTIONS of Service Bulletin 670BA-32-042
APPENDIX A

SERVICE BULLETIN 670BA-32-042

APPENDIX A

Page A2 of A3

Nov 05/2013

Left Inboard MLG Door

ba8023a01.cgm, kp, August 9, 2013

A

B

A

B
APPENDIX A

SERVICE BULLETIN 670BA-32-042

APPENDIX A

Page A3 of A3

Nov 05/2013

Right Inboard MLG Door

ba8023a02.cgm, kp, August 9, 2013

B
APPENDIX B

Page B1 of B2

Nov 05/2013

APPENDIX B

SERVICE BULLETIN 670BA-32-042

DATA SHEET

The data sheet contained in this appendix is given as references in the

ACCOMPLISHMENT INSTRUCTIONS of Service Bulletin 670BA-32-042
APPENDIX B

SERVICE BULLETIN 670BA-32-042

APPENDIX B

Page B2 of B2

Nov 05/2013

AIRCRAFT SERIAL NUMBER: __________________________________________

DATE (OF INSPECTION): _____________________________________________

Left Inboard MLG Door Right Inboard MLG Door

Inspection Results (Findings)

Inner skin damage YES____ NO____ YES____ NO____

Outer skin damage YES____ NO____ YES____ NO____

Forward member

damage YES____ NO____ YES____ NO____

Door Part Number

Serial Number

Comments

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THANK 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:

STRONGLY

DISAGREE

DISAGREE AGREE STRONGLY

AGREE

Instructions to do the service bulletin are

accurate.

Comments:

- - - -

Figure(s), picture(s), and/or Appendix

were helpful to do the service bulletin.

Comments:

- - - -

Part(s) or kit(s) agreed with the service

bulletin requirement.

Comments:

- - - -

The service bulletin was accomplished

within the estimated time given.

Comments:

- - - -

Overall, I was satisfied with this service

bulletin.

Comments:

- - - -

Operator: Service Centre:

Name: Telephone or Fax:

FAX your comments or feedback to (450) 476---7300

or e-mail to crj_sb_evaluation_form@aero.bombardier.com