SB 601R---32---107

Page 1 of 1

Dec 08/2010

SERVICE BULLETIN

REVISION TRANSMITTAL SHEET

CL ---600 ---2B19 Canadair Regional Jet (CRJ) Aircraft

SERVICE BULLETIN 601R ---32 ---107

SUBJECT: Landing Gear --- Brake System --- Replacement of the Accumulator

601R75138 ---1 (P/N 08 ---60163 ---001 or 08 ---60163 ---002) by 601R75139 ---1

(P/N 11093 ---4)

This page transmits:

Revision B of Service Bulletin 601R --- 32 --- 107,

pages 1 thru 12, dated Dec 08/2010

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

incorporated a previous issue of this service bulletin.

Reason:

Revised Accomplishment Instructions, paragraph 2., to:

Replace part numbers 601R75238---1 for 601R75138---1 and 601R75239---1 for

601R75139---1 in Figure 1.

This revision also includes small editorial changes that do not have an effect on the technical

content.

Instructions:

Discard the copy of Service Bulletin 601R --- 32 --- 107, Revision A, dated Jun 17/2010.

Replace with the copy attached.

Service Bulletin History:

Initial issue, dated May 11/2010.

Revision A, dated Jun 17/2010.

1
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May 11/2010 SB 601R---32---107

Revision B, Dec 08/2010

SERVICE BULLETIN

THIS SERVICE BULLETIN IS SENT TO EACH OPERATOR. IF THE OPERATOR HAS LEASED

HAS SOLD AIRCRAFT OR TRANSFERRED SPARES IN THE LAST SIX MONTHS, THIS SERVICE

BULLETIN MUST BE SENT TO THE NEW OWNER, UNLESS CONFIRMATION WAS RECEIVED

THAT BOMBARDIER COMMERCIAL AIRCRAFT HAS INCLUDED THE NEW OPERATOR

AIRCRAFT, THIS SERVICE BULLETIN MUST BE SENT TO THE LESSEE. IF THE OPERATOR

ON THE DISTRIBUTION LIST.

Technical

Publications

ATA SYSTEM: 32 ---43 NUMBER: 601R ---32 ---107

SUBJECT: Landing Gear --- Brake System --- Replacement of the Accumulator

601R75138 ---1 (P/N 08 ---60163 ---001 or 08 ---60163 ---002) by 601R75139 ---1

(P/N 11093 ---4)

1. PLANNING INFORMATION

A. Effectivity

(1) Aircraft Affected:

Service Bulletin: CL ---600---2B19 Canadair Regional Jet (CRJ) Aircraft Serial

Numbers 7003 thru 7067, 7069 thru 7990, 8000 thru 8999.

Production: There is no production effectivity at this time.

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 Bulletin(s). Before you do this

bulletin, examine all STC, STA or equivalent action changes to make

sure this bulletin can be completed.
SERVICE BULLETIN 601R---32 ---107

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May 11/2010 SB 601R---32---107

Revision B, Dec 08/2010

B. Reason

(1) Condition

It is possible for the screw caps of the brake accumulator to have cracks in

their inner shoulder. This can cause the screw cap to disconnect and cause

damage to the aircraft structure and systems.

(2) Evidence

Seven in---service aircraft had one screw cap disconnect from the body of the

accumulator.

(3) Objective/Benefit

This service bulletin gives the procedure to replace inboard and outboard

brake accumulators 601R75138---1 (08---60163---001 or 08---60163---002) by

inboard and outboard brake accumulators 601R75139---1 (11093---4).

The installation of the new accumulator will prevent the disconnection of the

end cap from the body of the accumulator.

C. Description

The safety lockpins are installed at the nose and at the main landing gears. The

wheel chocks are put at the main wheels. The hydraulic pressure is released from

hydraulic systems No.2 and No.3. Circuit breakers are opened. The access

panel 121AL is removed and the forward equipment ---compartment door is

opened. The nitrogen pressure is released from the outboard and the inboard

brake accumulators.

The inboard and outboard brake accumulators are removed. The new inboard and

outboard accumulators are installed.

The circuit breakers are closed. The inboard and outboard brake accumulators are

pressurized with nitrogen. Hydraulic systems No.2 and No.3 are bled. The

accumulators of the inboard and outboard brakes are bled. The operational test of

the inboard and outboard brake accumulators is done. The brake accumulators

are examined for leaks. Access panel 121AL is installed and the forward

equipment ---compartment door is closed.
SERVICE BULLETIN 601R---32 ---107

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May 11/2010 SB 601R---32---107

Revision B, Dec 08/2010

D. Compliance

Recommended Service Bulletin. Bombardier recommends that this service bulletin

be done no more than 4000 flight cycles or 2 years (whichever comes first) from the

release date on this service bulletin, unless otherwise directed by the airworthiness

authority of the operator.

NOTE: It is not necessary to do Alert Service Bulletin A601R---32---103, Landing

Gear --- Brake System --- Inspection of the Accumulator Screw---Caps

(P/N 08---60163---001, 08---60163---002), when this service bulletin is

done.

NOTE: It is not necessary to do Service Bulletin 601R---32---106, Landing Gear

--- Brake System --- Inspection of the Threads of the Accumulator

Screw---Caps (P/N 08---60163---001 and P/N 08---60163---002), when this

service bulletin 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 an estimate for direct labor done by an

experienced crew on an aircraft prepared for maintenance.

This estimate does not include the time necessary for:

− Administrative functions such as planning, liaison, 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.
SERVICE BULLETIN 601R---32 ---107

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May 11/2010 SB 601R---32---107

Revision B, Dec 08/2010

NOTE: For on --- site labor assistance, please speak with a Fleet Services

representative for a quote. The Fleet Services Team can be

contacted via the CRC at 514 --- 855 --- 8500 or email at

thd.crj@aero.bombardier.com.

It will take an estimated 5.0 man---hours to complete this service bulletin. The

man---hours are divided as shown in the table that follows (elapsed cure time is not

included in the man---hour summary given above):

TASK MAN ---HOURS

(1) Job Set ---Up 1.0

(2) Procedure 2.5

(3) Test 1.0

(4) Job Close---Out 0.5

G. Material --- Price and Availability

(1) There are no kits for this service bulletin. The part in the table that follows is

necessary to do this service bulletin and is available from Tactair.

PART NUMBER NAME QUANTITY

601R75139---1

(11093---4)

Accumulator 2

(2) Please send a purchase order to the address below to schedule the parts:

Tactair Fluid Controls Inc.

4806 West Taft Road

Liverpool, NY 13088, USA

Fax: (315) 457---5595

Phone: (315) 451---3928

Email: customer_support@tactair.com

Please contact Tactair Fluid Controls for terms and conditions.

(3) 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.
SERVICE BULLETIN 601R---32 ---107

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May 11/2010 SB 601R---32---107

Revision B, Dec 08/2010

I. Weight and Balance

WEIGHT ARM MOMENT ¡

2.8 (lb) 57.0 (inches) 0.160 ( 1000 lb---in.)

1.2 (kg) 1.45 (m) 0.002 (1000 kg ---m)

¡ The value in the Moment column is divided by 1000. Refer

to the Weight & Balance Manual CSP A ---041.

J. Electrical Load Data

Not changed.

K. References

Restriction and/or Special Instruction (RSI) C ---A262.

Modification Summary TC601R17849, Revision A.

Tactair Fluid Controls Service Letter TFC ---SIL ---2008.

Aircraft Maintenance Manual, CSP A ---001.

Structural Repair Manual, CSP A ---008.

For Bombardier reference only: PCA 5325.

L. Other Publications Affected

Illustrated Parts Catalog (IPC) CSP A ---006 ........................

M. Relationship Chart

PRE ---SB

PART NUMBER NAME POST ---SB

PART NUMBER NAME

601R75138---1

(08---60163---001

or

08---60163---002)

Accumulator 601R75139---1

(11093---4) Accumulator
SERVICE BULLETIN 601R---32 ---107

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May 11/2010 SB 601R---32---107

Revision B, Dec 08/2010

2. ACCOMPLISHMENT INSTRUCTIONS

A. Job Set ---Up

Reference Information

REFERENCE DESIGNATION

AMM 10---11---00---000---801 Removal of the Nose Landing Gear Lockpin

AMM 10---11---00---000---802 Removal of the Main Landing Gear Lockpins

AMM 10---11---00---400---801 Installation of the Nose Landing Gear Lockpin

AMM 10---11---00---400---802 Installation of the Main Landing Gear Lockpins

AMM 12---00---06---863---802 Release Hydraulic Pressure --- Systems No. 1

and No. 2

AMM 12---00---06---863---804 Release Hydraulic Pressure --- System No. 3

AMM 12---12---29---611---803 Replenish the Reservoirs of the Hydraulic Systems

AMM 12---12---29---614---802 Replenish the Accumulators of the Hydraulic

Systems

AMM 24---00---00---910---801 Electrical/Electronic Safety Precautions

AMM 29---00---00---910---801 Hydraulic Safety Precautions

AMM 29---10---00---870---802 Bleed Hydraulic System No. 2

AMM 29---10---00---870---803 Bleed Hydraulic System No. 3

AMM 32---43---00---870---801 Bleeding of the Brakes

AMM 32---43---16---000---801 Removal of the Brake Accumulator

AMM 32---43---16---400---801 Installation of the Brake Accumulator

AMM 32---43---16---710---801 Operational Test of the Brake Accumulator

WARNING: MAKE SURE THAT THE SAFETY LOCKPINS ARE INSTALLED ON THE

NOSE AND MAIN LANDING GEAR. THE NOSE AND MAIN LANDING

GEAR CAN ACCIDENTALLY RETRACT. THIS CAN CAUSE INJURY TO

PERSONS AND/OR DAMAGE TO EQUIPMENT.

(1) Install the safety lockpins at the nose landing gear and at the main landing

gear (Refer AMM 10---11---00---400---801 and AMM 10---11---00---400---802).
SERVICE BULLETIN 601R---32 ---107

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Revision B, Dec 08/2010

WARNING: MAKE SURE THAT THE WHEEL CHOCKS ARE PUT AT THE MAIN

WHEELS. IF YOU DO NOT DO THIS, THE AIRCRAFT CAN MOVE. THIS

CAN CAUSE INJURIES TO PERSONS AND/OR DAMAGE TO

EQUIPMENT.

(2) Put the wheel chocks at the main wheels.

WARNING: OBEY ALL THE HYDRAULIC SAFETY PRECAUTIONS WHEN YOU DO

WORK ON ANY HYDRAULIC SYSTEM OR ON A HYDRAULIC SYSTEM

COMPONENT. IF YOU DO NOT OBEY THE SAFETY PRECAUTIONS,

YOU CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO

EQUIPMENT.

(3) Obey all the hydraulic safety precautions

(Refer to AMM 29---00---00---910---801).

(4) Release the hydraulic pressure from hydraulic system No. 2 and No.3

(Refer to AMM 12---00---06---863---802 and AMM 12---00---06---863---804).

WARNING: OBEY ALL THE SAFETY PRECAUTIONS WHEN YOU DO

MAINTENANCE ON OR NEAR ELECTRICAL/ELECTRONIC

EQUIPMENT. IF YOU DO NOT OBEY THE SAFETY PRECAUTIONS,

INJURIES TO PERSONS AND/OR DAMAGE TO THE EQUIPMENT CAN

OCCUR.

(5) Obey all the electrical/electronic safety precautions

(Refer to AMM 24---00---00---910---801).

(6) Open, safety, and tag the circuit breakers that follow:

CB PANEL CB NO. NAME ZONE

CBP ---1 A2 HYD PUMP 3B 221

CBP ---1 A5 HYD PUMP 2 221

CBP ---1 G11 HYD SYST AC PUMP CONT 3B 221

CBP ---1 G14 HYD SYST AC PUMP CONT 2 221

CBP ---2 A2 HYD PUMP 3A 222

CBP ---2 G15 HYD SYST AC PUMP CONT 3A 222
SERVICE BULLETIN 601R---32 ---107

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Revision B, Dec 08/2010

(7) Remove the access panel that follows:

ACCESS DESIGNATION

121AL Nose hydraulics compartment

(8) Open forward equipment ---compartment door 211AL.

Refer to Figure 1.

WARNING: DO NOT DISCONNECT THE NITROGEN LINE AT THIS TIME. THE

NITROGEN LINE IS PRESSURIZED. IF YOU DISCONNECT THE

PRESSURIZED NITROGEN LINE, YOU CAN CAUSE INJURIES TO

PERSONS AND/OR DAMAGE TO EQUIPMENT.

(9) Release the nitrogen pressure from the inboard and outboard brake

accumulators as follows:

NOTE: The nitrogen charge points, with gauges, are installed in the forward

equipment compartment above the nose hydraulics compartment. The

top gauge/charge point is for the top accumulator and the bottom

gauge/charge point is for the bottom accumulator.

(a) Remove the dust cap (3) from the charging valve (1).

(b) Carefully loosen the thin nut on the charging valve (1).

(c) Let the nitrogen pressure go to zero.
SERVICE BULLETIN 601R---32 ---107

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May 11/2010 SB 601R---32---107

Revision B, Dec 08/2010

B. Procedure

Refer to Figure 1.

(1) Remove the inboard and outboard brake accumulators (2)

(Refer to AMM 32---43---16---000---801).

(2) Install the new inboard and outboard brake accumulators (2)

(Refer to AMM 32---43---16---400---801).

C. Job Close ---Out

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

(2) Clean all signs of hydraulic fluid from the inboard and outboard brake

accumulators and the adjacent work area.

(3) Remove the tags and close the circuit breakers that follow:

CB PANEL CB NO. NAME ZONE

CBP ---1 A2 HYD PUMP 3B 221

CBP ---1 A5 HYD PUMP 2 221

CBP ---1 G11 HYD SYST AC PUMP CONT 3B 221

CBP ---1 G14 HYD SYST AC PUMP CONT 2 221

CBP ---2 A2 HYD PUMP 3A 222

CBP ---2 G15 HYD SYST AC PUMP CONT 3A 222

(4) Replenish the reservoirs of hydraulic systems No.2 and No.3

(Refer to AMM 12---12---29---611---803).

(5) Pressurize the inboard and outboard brake accumulators with nitrogen

(Refer to AMM 12---12---29---614---802).

(6) Do the bleeding of hydraulic systems No. 2 and No. 3

(Refer to AMM 29---10---00---870---802 and AMM 29---10---00---870---803).

(7) Do the bleeding of the inboard and outboard brakes

(Refer to AMM 32---43---00---870---801).

(8) Do the operational test of the inboard and outboard brake accumulators

(Refer to AMM 32---43---16---710---801).

(9) Make sure there is no leak in the installation of the inboard and outboard

brake accumulators.
SERVICE BULLETIN 601R---32 ---107

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Revision B, Dec 08/2010

(10) Install the access panel that follows:

ACCESS DESIGNATION

121AL Nose hydraulics compartment access

panel

(11) Close forward equipment ---compartment access door 211AL.

(12) Make sure the safety lockpins at the nose landing gear and at the main

landing gear are removed (Refer AMM 10---11---00---000---801 and

AMM 10---11---00---000---802).

(13) When this service bulletin is completed, add the weight and balance data

shown in paragraph 1.I. of this service bulletin to the Weight and Balance

Manual. Under ‘Description of Change’ enter “Service Bulletin 601R---32---107,

Revision B, incorporated.”

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

logbook(s): “Service Bulletin 601R---32---107, Revision B, Landing Gear ---

Brake System --- Replacement of the Accumulator 601R75138---1 (P/N

08---60163---001 or 08---60163---002) by 601R75139---1 (P/N 11093---4),

incorporated.”
SERVICE BULLETIN 601R---32 ---107

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Revision B, Dec 08/2010

Removal/Installation --- Inboard and Outboard Brake Accumulators

Figure 1

rsb601r32107_001.cgm

BRAKE ACCUMULATOR

CHARGING POINTS

1

3 A

B

A

LEGEND

1. Nitrogen charge valve.

2. Accumulator

601R75138--1 (08--60163--001

or 08--60163--002) (Pre--Mod)

601R75139--1 (11093--4) (Post--Mod).

3. Dust cap.

3

B

2

2

3
SERVICE BULLETIN 601R---32 ---107

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May 11/2010 SB 601R---32---107

Revision B, Dec 08/2010

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

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 installed parts on the aircraft (or

spares), and the relation of installed parts (or spares) to the new parts to be

installed with this service bulletin.

PRE ---SB

PART NUMBER

NAME QUANTITY DC POST ---SB

PART

NUMBER

NAME

601R75138---1

(08---60163---001

or

08---60163---002)

Accumulator 2 RTN 601R75139---1

(11093---4) Accumulator

Disposition code (DC):

RTN: Refer to Tactair Fluid Controls Service Information Letter

TFC ---SIL ---2008.

Return parts to the address that follows:

Tactair Fluid Controls Inc.

Attn: Customer Support Repair

4806 West Taft Road

Liverpool, NY 13088, USA

Phone: (315) ---451---3928

Fax: (315) ---457---5595

1
THANK YOU FOR ANSWERING THIS EVALUATION FORM 

UPON COMPLETION OF THIS EVALUATION FORM/COMPLIANCE SHEET, FAX TO 

450-476-7300 

SERVICE BULLETIN EVALUATION FORM/COMPLIANCE SHEET 

(YOUR IDEAS WILL HELP US PROVIDE BETTER BULLETINS) 

SERVICE BULLETIN : 601R-32-107 ISSUE: B 

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