SB 601R---29---035 Page 1 of 1 Dec 08/2010 

## SERVICE BULLETIN REVISION TRANSMITTAL SHEET CL ---600 ---2B19 Canadair Regional Jet (CRJ) 

### Aircraft SERVICE BULLETIN 601R ---29 ---035

SUBJECT: Hydraulic Power --- Hydraulic System No.1 --- Replacement of the Accumulator 601R75138 ---1 (08 ---60163 ---001 or 08 ---60163 ---002) by 601R75139 ---1 (11093 ---4) This page transmits: Revision A of Service Bulletin 601R --- 29 --- 035, pages 1 thru 20, dated Dec 08/2010
The change in this revision have an effect on aircraft that have incorporated a previous issue of this service bulletin.

Reason: Revised Planning Information, paragraph 1., to: Add PART A and Part B Add reducer P/N MS21916J8---6 information. Revised Accomplishment Instructions, paragraph 2., to: Add PART A and Part B. Add new instructions for the removal and the installation of the reducer and also change Figure 1 and add Figure 2. Revised Material Information, paragraph 3., to: Add a part to Disposition of Parts section, paragraph 3.D. 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 --- 29 --- 035, Initial Issue, dated May 11/ 2010. Replace with the copy attached. Service Bulletin History: Initial issue, dated May 11/2010 1Page 1 of 20 SB 601R---29---035 May 11/2010 Revision A, Dec 08/2010 

# SERVICE BULLETIN

Technical Publications

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.

ATA SYSTEM: 29 ---11 NUMBER: 601R ---29 ---035 SUBJECT: Hydraulic Power --- Hydraulic System No.1 --- Replacement of the Accumulator 601R75138 ---1 (08 ---60163 ---001 or 08 ---60163 ---002) by 601R75139 ---1 (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 e quivalent action changes to make sure this bulletin can be completed. B. Reason (1) Condition It is possible for the screw caps to disconnect and cause damage to the aircraft structure and systems.

### SERVICE BULLETIN 601R---29 ---035

Page 2 of 20 SB 601R---29---035 May 11/2010 Revision A, Dec 08/2010 (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 the hydraulic system No.1 accumulator 601R75138---1 (08---60163---001 or 08---60163---002) by the hydraulic system No.1 accumulator 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 This service bulletin is divided into 2 parts: PART A and PART B. PART A --- Replacement of the hydraulic system No.1 accumulator The safety lockpins are installed at the nose and at the main landing gears. The hydraulic pressure is released from hydraulic system No.1. Circuit breakers are opened. The aft equipment ---compartment door is opened. The hydraulic system No.1 accumulator is removed. If installed, reducer P/N MS21916D8---6 is replaced by P/N MS21916J8---6. The new accumulator is installed. The circuit breakers are closed. The reservoir of hydraulic system No.1 is replenished. Hydraulic system No.1 is bled. The aft equipment ---compartment access door is closed. For Aircraft that have the initial issue of this service bulletin incorporated and that have reducer P/N MS21916D8 ---6 installed PART B --- Replacement of the reducer of the hydraulic system No.1 accumulator The safety lockpins are installed at the nose and at the main landing gears. The hydraulic pressure is released from hydraulic system No.1. Circuit breakers are opened. The aft equipment ---compartment door is opened. The reducer is removed from the accumulator. The new reducer is installed on accumulator.

### SERVICE BULLETIN 601R---29 ---035

Page 3 of 20 SB 601R---29---035 May 11/2010 Revision A, Dec 08/2010 The circuit breakers are closed. The accumulator is replenished. The reservoir of hydraulic system No.1 is replenished. Hydraulic system No.1 is bled. The aft equipment ---compartment access door is closed. D. Compliance PART A --- Replacement of the hydraulic system No.1 accumulator Recommended Service Bulletin. Bombardier recommends that PART A of 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. This service bulletin does not affect Airworthiness Limitations (AWLs) or Damage Tolerance inspections (DTIs). NOTE: For the hydraulic system No.1 only, it is not necessary to do Alert Service Bulletin A601R---29---029, Hydraulic Power --- Hydraulic System No.1 and No.2 --- Inspection of the Accumulator Screw---Caps, when this service bulletin is done. NOTE: It is not necessary to do Service Bulletin 601R---29---033, Hydraulic Power --- Hydraulic System No.1 --- 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. For Aircraft that have the initial issue of this service bulletin incorporated and that have reducer P/N MS21916D8 ---6 installed PART B --- Replacement of the reducer of the hydraulic system No.1 accumulator Recommended Service Bulletin. Bombardier recommends that PART B of this service bulletin be done no more than 1200 flight cycles or no later than 8 months (whichever comes first) from the installa tion of hydraulic system No. 1 accumulator P/N 601R75139---1, unless otherwise directed by the airworthiness authority of the operator.
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:

### SERVICE BULLETIN 601R---29 ---035

Page 4 of 20 SB 601R---29---035 May 11/2010 Revision A, Dec 08/2010 − 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. NOTE: For any 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. PART A --- Replacement of the hydraulic system No.1 accumulator 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
For Aircraft that have the initial issue of this service bulletin incorporated and that have reducer P/N MS21916D8 ---6 installed PART B --- Replacement of the reducer of the hydraulic system No.1 accumulator It will take an estimated 4.5 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):

### SERVICE BULLETIN 601R---29 ---035

Page 5 of 20 SB 601R---29---035 May 11/2010 Revision A, Dec 08/2010 TASK MAN ---HOURS (1) Job Set ---Up 1.0 (2) Procedure 2.0 (3) Test 1.0 (4) Job Close---Out 0.5
G. Material --- Price and Availability PART A --- Replacement of the hydraulic system No.1 accumulator (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 Bombardier Commercial Aircraft.

PART NUMBER NAME QUANTITY

MS21916J8---6 Reducer 1

NAS1612---8 Packing 1
(2) Please send a purchase order to the address below to schedule the kit: 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

### SERVICE BULLETIN 601R---29 ---035

Page 6 of 20 SB 601R---29---035 May 11/2010 Revision A, Dec 08/2010 For All aircraft (3) 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 1
(4) Please send a purchase order to the address below to schedule the part: 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. For Aircraft that have the initial issue of this service bulletin incorporated and that have reducer P/N MS21916D8 ---6 installed PART B --- Replacement of the reducer of the hydraulic system No.1 accumulator (5) 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 Bombardier Commercial Aircraft.
PART NUMBER NAME QUANTITY

MS21916J8---6 Reducer 1

NAS1612---8 Packing 1 (6) Please send a purchase order to the address below to schedule the kit: 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.

### SERVICE BULLETIN 601R---29 ---035

Page 7 of 20 SB 601R---29---035 May 11/2010 Revision A, Dec 08/2010 H. Tooling --- Price and Availability There are no tool kits for this service bulletin. I. Weight and Balance

WEIGHT ARM MOMENT ¡ 1.4 (lb) 838.9 (inches) 1.174 (1000 lb---in.) 0.6 (kg) 21.31 (m) 0.013 (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 ---A261. Restriction and/or Special Instruction (RSI) C ---A271. Modification Summary TC601R17849, Revision A. Tactair Fluid Controls Service Letter TFC ---SIL ---2008. Aircraft Maintenance Manual, CSP A ---001. 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

MS21916D8---6 Reducer MS21916J8---6 Reducer

### SERVICE BULLETIN 601R---29 ---035

Page 8 of 20 SB 601R---29---035 May 11/2010 Revision A, Dec 08/2010 2. ACCOMPLISHMENT INSTRUCTIONS PART A --- Replacement of the hydraulic system No.1 accumulator A. Job Set ---Up

REFERENCE DESIGNATION AMM 10---11---00---000---801 Removal of the Nose Landing Gear Lockpin AMM 10---11---00---400---801 Installation of the Nose Landing Gear Lockpin AMM 10---11---00---000---802 Removal of the Main Landing Gear Lockpins 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---12---29---611---803 Replenish the Reservoirs 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---801 Bleed Hydraulic System No.1 AMM 29---11---11---000---801 Removal of the Accumulator Assembly --- Systems No.1 and No.2 AMM 29---11---11---400---801 Installation of the Accumulator Assembly --- Systems No.1 and No.2 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 INJURIES TO PERSONS AND/OR DAMAGE TO EQUIPMENT. (1) Install the safety lockpins at the nose and the main landing gears (Refer to AMM 10---11---00---400---801 and AMM 10---11---00---400---802).

### SERVICE BULLETIN 601R---29 ---035

Page 9 of 20 SB 601R---29---035 May 11/2010 Revision A, Dec 08/2010 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. (2) Obey all the hydraulic safety precautions (Refer to AMM 29---00---00---910---801). (3) Release the hydraulic pressure from hydraulic system No. 1 (Refer to AMM 12---00---06---863---802). 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. (4) Obey all the electrical/electronic safety precautions (Refer to AMM 24---00---00---910---801). (5) Open, safety, and tag the circuit breakers that follow:
CB PANEL CB NO. NAME ZONE

CBP ---1 M5 ENG START L 221 CBP ---2 A5 HYD PUMP 1 222 CBP ---2 G14 HYD SYST AC PUMP CONT 1 222
(6) Open the aft equipment ---compartment door.

### SERVICE BULLETIN 601R---29 ---035

Page 10 of 20 SB 601R---29---035 May 11/2010 Revision A, Dec 08/2010 B. Procedure Refer to Figure 1. For Aircraft that have reducer P/N MS21916D8 ---6 installed (1) Remove the accumulator (1) and the reducer (2) from hydraulic system No.1 (Refer to AMM 29---11---11---000---801). (2) Discard the reducer (2). (3) Install the new accumulator (1) and the new reducer (2) on hydraulic system No.1 (Refer to AMM 29---11---11---400---801). For Aircraft that have reducer P/N MS21916J8 ---6 installed (4) Remove the accumulator (1) from hydraulic system No.1 (Refer to AMM 29---11---11---000---801). (5) Install the new accumulator (1) on hydraulic system No.1 (Refer to AMM 29---11---11---400---801).

### SERVICE BULLETIN 601R---29 ---035

Page 11 of 20 SB 601R---29---035 May 11/2010 Revision A, Dec 08/2010 C. 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 ZONE

CBP ---1 M5 ENG START L 221 CBP ---2 A5 HYD PUMP 1 222 CBP ---2 G14 HYD SYST AC PUMP CONT 1 222
(3) Replenish the reservoirs of the hydraulic system No.1 (Refer to AMM 12---12---29---611---803). (4) Bleed hydraulic system No.1 (Refer to AMM 29---10---00---870---801). (5) Close the aft equipment ---compartment door. (6) Make sure that the nose and the main landing gear lockpins are removed (Refer to AMM 10---11---00---000---801 and AMM 10---11---00---000---802). (7) When PART A of this service bulletin is completed, make this entry in the applicable logbook(s): “Service Bulletin 601R---29---035, Revision A, Hydraulic Power --- Hydraulic System No.1 --- Replacement of the Accumulator 601R75138---1 (08---60163---001 or 08---60163---002) by 601R75139---1 (11093---4), PART A, incorporated.”

### SERVICE BULLETIN 601R---29 ---035

Page 12 of 20 SB 601R---29---035 May 11/2010 Revision A, Dec 08/2010 For Aircraft that have the initial issue of this service bulletin incorporated and that have reducer P/N MS21916D8 ---6 installed PART B --- Replacement of the reducer of the hydraulic system No.1 accumulator D. Job Set ---Up
REFERENCE DESIGNATION AMM 10---11---00---000---801 Removal of the Nose Landing Gear Lockpin AMM 10---11---00---400---801 Installation of the Nose Landing Gear Lockpin AMM 10---11---00---000---802 Removal of the Main Landing Gear Lockpins 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---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---801 Bleed Hydraulic System No.1 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 INJURIES TO PERSONS AND/OR DAMAGE TO EQUIPMENT. (1) Install the safety lockpins on the nose and the main landing gears (Refer to AMM 10---11---00---400---801 and AMM 10---11---00---400---802). 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. (2) Obey all the hydraulic safety precautions (Refer to AMM 29---00---00---910---801). (3) Release the hydraulic pressure from hydraulic system No. 1 (Refer to AMM 12---00---06---863---802).

### SERVICE BULLETIN 601R---29 ---035

Page 13 of 20 SB 601R---29---035 May 11/2010 Revision A, Dec 08/2010 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. (4) Obey all the electrical/electronic safety precautions (Refer to AMM 24---00---00---910---801). (5) Open, safety, and tag the circuit breakers that follow:
CB PANEL CB NO. NAME ZONE

CBP ---1 M5 ENG START L 221 CBP ---2 A5 HYD PUMP 1 222 CBP ---2 G14 HYD SYST AC PUMP CONT 1 222
(6) Open the aft equipment ---compartment door.
E. Procedure Refer to Figure 2. (1) Prepare the accumulator (6) of hydraulic system No. 1 for the removal of the reducer (7) as follows: (a) Remove the valve cap (3) from the pressure gauge(1). (b) Remove the lockwire (5) from the nut (4). WARNING: USE PROTECTIVE GLOVES TO CAREFULLY LOOSEN THE VALVE NUT ON THE NITROGEN CHARGING VALVE. KEEP YOUR HANDS AWAY FROM THE NITROGEN LEAKAGE. THE NITROGEN LINE IS PRESSURIZED AND CAN CAUSE INJURIES. (c) Wear protective gloves. Slowly turn the charging valve (2) counter ---clockwise two turns. Let the nitrogen pressure decrease to zero. (d) Tighten the nut (4) on the charging valve (2) to a maximum of 50 lbf S in.±5 lbf S in(5.65Nm±1.13Nm). (e) Safety the nut (4) with lockwire (5).

### SERVICE BULLETIN 601R---29 ---035

Page 14 of 20 SB 601R---29---035 May 11/2010 Revision A, Dec 08/2010 (f) Install the valve cap (3) on the charging valve (2). (2) Replace the reducer (7) of the hydraulic system No. 1 accumulator as follows: (a) Disconnect the hydraulic line from the reducer (7). (b) Remove the reducer (7) and the packing (8) from the accumulator (6). (c) Discard the reducer (7) and the packing (8). (d) Lubricate the new packing (8) with clean hydraulic fluid. (e) Install the new reducer (7) and the new packing (8) in the accumulator (6). (f) Connect the hydraulic line to the new reducer (7).

### SERVICE BULLETIN 601R---29 ---035

Page 15 of 20 SB 601R---29---035 May 11/2010 Revision A, Dec 08/2010 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 ZONE

CBP ---1 M5 ENG START L 221 CBP ---2 A5 HYD PUMP 1 222 CBP ---2 G14 HYD SYST AC PUMP CONT 1 222
(3) Replenish the accumulator (Refer to AMM 12---12---29---614---802). (4) Replenish the reservoirs of hydraulic system No.1 (Refer to AMM 12---12---29---611---803). (5) Bleed hydraulic system No.1 (Refer to AMM 29---10---00---870---801). Refer to Figure 2. (6) With leak detection compound, examine the area adjacent to the reducer (7) at the accumulator (6) and the nitrogen line for nitrogen leaks. (7) Close the aft equipment ---compartment door. (8) Make sure that the nose and the main landing gear lockpins are removed (Refer to AMM 10---11---00---000---801 and AMM 10---11---00---000---802). (9) When PART B of this service bulletin is completed, make this entry in the applicable logbook(s): “Service Bulletin 601R---29---035, Revision A, Hydraulic Power --- Hydraulic System No.1 --- Replacement of the Accumulator 601R75138---1 (08---60163---001 or 08---60163---002) by 601R75139---1 (11093---4) , PART B, incorporated.”

### SERVICE BULLETIN 601R---29 ---035

Page 16 of 20 SB 601R---29---035 May 11/2010 Revision A, Dec 08/2010 Removal/Installation --- Accumulator of Hydraulic System No.1 Figure 1rsb601r29035_001.cgm, sc, oct 2010 LEGEND 1. Accumulator 601R75138--1 (08--60163--01 or 08--60163--002) (Pre--Mod). 601R75139--1 (11093--4) (Post--Mod). 2. Reducer MS21916D8--6 (Pre--Mod) MS21916J8--6 (Post--Mod). NOTE For aircraft that have reducer MS21916D8--6 installed. 1

A B A

1

B 2 1

### SERVICE BULLETIN 601R---29 ---035

Page 17 of 20 SB 601R---29---035 May 11/2010 Revision A, Dec 08/2010 Removal/Installation --- Reducer of the Accumulator of Hydraulic System No.1 Figure 2rsb601r29036_001.cgm, sc, oct 2010 6. Accumulator 601R75139--1 (11093--4). 7. Reducer MS21916D8--6 (Pre--Mod) MS21916J8--6 (Post--Mod). 8. Packing NAS1612--8. LEGEND 1. Pressure gauge. 2. Charging valve. 3. Valve cap. 4. Nut. 5. Lockwire MS20995C32.

6 7 8 HYDRAULIC LINE (REF) A

NITROGEN LINE (REF) NITROGEN LINE (REF)

1

4 5 2 3 A

B

B

### SERVICE BULLETIN 601R---29 ---035

Page 18 of 20 SB 601R---29---035 May 11/2010 Revision A, Dec 08/2010 3. MATERIAL INFORMATION
A. Kit Information None. B. Consumable Information The materials that follow are necessary to do this service bulletin and can be ordered from Bombardier or purchased directly from industry sources. If the material is ordered from Bombardier, there can be some lead time because of shelf life of the material. CONSUMABLES SPECIFICATION QUANTITY NAME REFERENCE SAE AS1241 or BAMS 564---003 As necessary Hydraulic fluid, phosphate ester base 02---001 ¡

MIL ---L ---25567, TYP I or II As necessary Compound, leak detection, oxygen systems (or equivalent) 05---037 ¡

MS20995C32 or ASTM A580 As necessary Lockwire, corrosion--- resistant steel, 0.032 in. (0.81 mm) diameter composition 302 or 304 05---004 ¡

¡ Refer to AMM 51---31---00---990---801
NOTE: To complete this list of consumables, refer to the different tasks 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.

### SERVICE BULLETIN 601R---29 ---035

Page 19 of 20 SB 601R---29---035 May 11/2010 Revision A, Dec 08/2010 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. PART A --- Replacement of the hydraulic system No.1 accumulator
PRE ---SB PART NUMBER NAME QUANTITY DC POST ---SB PART NUMBER NAME

601R75138---1 (08---60163---001 or 08---60163---002) Accumulator 1 RTN 601R75139---1 (11093---4) Accumulator

MS21916D8---6 Reducer 1 DIS MS21916J8---6 Reducer

NAS1612---8 Packing 1 DIS NAS1612---8 Packing For Aircraft that have the initial issue of this service bulletin incorporated and that have reducer P/N MS21916D8 ---6 installed PART B --- Replacement of the reducer of the hydraulic system No.1 accumulator
PRE ---SB PART NUMBER NAME QUANTITY DC POST ---SB PART NUMBER NAME

MS21916D8---6 Reducer 1 DIS MS21916J8---6 Reducer NAS1612---8 Packing 1 DIS NAS1612---8 Packing Disposition code (DC): DIS: Discard Part. RTN: Refer to Tactair Fluid Controls Service Information Letter TFC ---SIL ---2008.

### SERVICE BULLETIN 601R---29 ---035

Page 20 of 20 SB 601R---29---035 May 11/2010 Revision A, Dec 08/2010 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 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 : 601R-29-035 ISSUE: A

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