SB 670BA-32-044 Page 1 of 8 May 29/2013 

# 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: 32-32 NUMBER: 670BA-32-044 SUBJECT: Landing Gear --- Landing-Gear Hydraulic Extension/Retraction System --- Inspection/Replacement of the Inboard Retraction-Actuator Bracket-Pin of the Main Landing Gear (MLG)

1. PLANNING INFORMATION
A. Effectivity (1) Aircraft with the components that follow installed:

MLG-DRESSED SHOCK STRUT (LH) PART NUMBERS: 49000-5, 49000-11, 49000-15, 49000-17, and FT49000-853

MLG-DRESSED SHOCK STRUT (LH) SERIAL NUMBERS: MA0001 and MA0007 thru MA0022

MLG-DRESSED SHOCK STRUT (RH) PART NUMBERS: 49000-6, 49000-12, 49000-16, 49000-18, and FT49000-854

MLG-DRESSED SHOCK STRUT (RH) SERIAL NUMBERS: MA0001 and MA0007 thru MA0022

### SERVICE BULLETIN 670BA-32-044

SB 670BA-32-044 Page 2 of 8 May 29/2013 INSTALLED AT THE TIME OF DELIVERY ON CL-600-2C10 AIRCRAFT WITH SERIAL NUMBERS: 10002 thru 10025 [1]

SPARES: Examine all spare parts. If a part with a serial number listed above is found, it is necessary to incorporate Goodrich Service Bulletin 49131-32-79.
ALL CL-600-2C10, CL-600-2D15, CL-600-2D24, AND CL-600-2E25 AIRCRAFT If parts with the serial numbers listed above are installed on aircraft, but were not identified at the time of delivery, on the same or on a different aircraft model, it is necessary to incorporate Goodrich Service Bulletin 49131-32-79.
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. B. Reason (1) Condition It is possible that an unapproved inboard retraction-actuator braket-pin (written as “pin” in this service bulletin) part number (P/N) 49131-1 was installed on some MLGs during production. The unapproved pin P/N 49131-1 is weaker than approved pin P/N 49131-3. If the pin breaks it can result in an undamped gear free fall, which can result in a MLG collapse. (2) Evidence An incorrect pin part number was found installed on one in-service aircraft and five others were returned to the manufacturer.

### SERVICE BULLETIN 670BA-32-044

SB 670BA-32-044 Page 3 of 8 May 29/2013 (3) Objective/Benefit This service bulletin gives the instructions to do Goodrich Service Bulletin 49131-32-79 and to replace the incorrect pins. This will make sure that the correct pins are installed. C. Description The pins are inspected and, if necessary, replaced with the procedure given in Goodrich Service Bulletin 49131-32-79 and the Aircraft Maintenance Manual. D. Compliance

Recommended Service Bulletin. Bombardier recommends that this service bulletin be done at no more than 6600 flight hours from the release date of this service bulletin, 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: ---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.

### SERVICE BULLETIN 670BA-32-044

SB 670BA-32-044 Page 4 of 8 May 29/2013 ---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. It will take an estimated 1.0 man-hour 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 0.5 (3) Test N/A (4) Job Close-Out 0.25
NOTE: This estimate includes the man-hours necessary to do Goodrich Service Bulletin 49131-32-79. G. Material --- Price and Availability (1) Refer to Goodrich Service Bulletin 49131-32-79. (2) 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. 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-32-1560-00, Revision A Goodrich Service Bulletin 49131-32-79, dated May 13/13 Aircraft Maintenance Manual (AMM) For Bombardier reference only: PCA 75257

### SERVICE BULLETIN 670BA-32-044

SB 670BA-32-044 Page 5 of 8 May 29/2013 L. Other Publications Affected None. M. Relationship Chart Not applicable.

### SERVICE BULLETIN 670BA-32-044

SB 670BA-32-044 Page 6 of 8 May 29/2013 2. ACCOMPLISHMENT INSTRUCTIONS Reference
REFERENCE DESIGNATION
AMM 12-00-00-867-801 Standard Aircraft Configuration for Maintenance AMM 29-00-00-910-801 Hydraulic Safety Precautions AMM 32-32-05-000-804 Removal of the Inboard-MLG Retraction-Actuator Bracket-Pin AMM 32-32-05-400-804 Installation of the Inboard-MLG Retraction-Actuator Bracket-Pin A. Job Set-Up (1) Make sure that the aircraft is in standard configuration for maintenance (refer to AMM 12-00-00-867-801). (2) Obey all the hydraulic safety precautions (refer to AMM 29-00-00-910-801).
B. Procedure Refer to Figure 1. (1) Inspect the left and the right MLG to find if pin (1) or pin (2) is installed (refer to Goodrich Service Bulletin 49131-32-79). (2) If the two pins (2) are installed, continue to the Job Close-Out. (3) If one or two pins (1) is/are installed, continue to the next step. (4) Remove the pin(s) (1) from the retraction-actuator bracket and discard (refer to AMM 32-32-05-000-804). (5) Install the pin(s) (2) in the retraction-actuator bracket (refer to AMM 32-32-05-400-804). 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-32-044, Landing Gear --- Landing-Gear Hydraulic Extension/Retraction System --- Inspection/Replacement of the Inboard Retraction-Actuator Bracket-Pin of the Main Landing Gear (MLG), incorporated.”

### SERVICE BULLETIN 670BA-32-044

SB 670BA-32-044 Page 7 of 8 May 29/2013 Inboard MLG Retraction-Actuator Bracket-Pin - Component Location Figure 1 (Sheet 1 of 1) A B

A

B 1 or 2ba7871a01.cgm, cr, 09--may--2013 LEGEND 1. Pin 49131--1. 2. Pin 49131--3.

RETRACTION-- ACTUATOR BRACKET (REF)

### SERVICE BULLETIN 670BA-32-044

SB 670BA-32-044 Page 8 of 8 May 29/2013 3. MATERIAL INFORMATION

A. Kit Information None. B. Consumable Information For a list of consumables, refer to the different tasks that are 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 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
49131-1 Pin, Inboard MLG 1 or 2 DIS 49131-3 Disposition code (DC): DIS: Discard Part. 1THANK YOU FOR ANSWERING THIS EVALUATION FORM UPON COMPLETION OF THIS EVALUATION FORM/COMPLIANCE SHEET, FAX TO 450-476-7300 or email to CRJ_SB_Evaluation_Form@aero.bombardier.com 

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

SERVICE BULLETIN : 670BA-32-044 ISSUE: --

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