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

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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

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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

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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

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L. Other Publications Affected

None.

M. Relationship Chart

Not applicable.
SERVICE BULLETIN 670BA-32-044

SB 670BA-32-044

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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

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May 29/2013

Inboard MLG Retraction-Actuator Bracket-Pin - Component Location

Figure 1 (Sheet 1 of 1)

A

B

A

B

1

or

2

ba7871a01.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

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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.

1
THANK 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 EVALUATION 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:

    

 Illustration(s), figure(s), picture(s) and/or 

kit drawing(s) were helpful to carry out 

instructions. 

Comments:

    

 If a parts kit was required, did the kit 

contents received agree with the 

contents listed in the bulletin? 

Comments: 

    

 Aircraft hands-on work was 

accomplished in estimated time. 

 Comments:

    

 Overall, I was satisfied with this Service 

Bulletin. 

 Comments: 

    

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