Basic Issue: Dec 16/2010 100-29-14

Page 1 of 1 

SERVICE BULLETIN SUMMARY 

This Service Bulletin is available at: 

www.cic.bombardier.com

BD-100-1A10 (CL-300)

ATA 29-21 

HYDRAULIC POWER 

SPECIAL CHECK/MODIFICATION – AUXILIARY HYDRAULIC SYSTEM – 

REPLACEMENT OF ACCUMULATOR, PART NO. 900095-1 

The information below is provided for your reference. For full details, please 

see corresponding paragraph contained within this bulletin. 

RECOMMENDED

SPECIFIED TIME COMPLIANCE

COMPLIANCE TIME 

Refer to Paragraph 1.D.

EFFECTIVITY: A/C Serial No. 20003 to 20335 

MANPOWER: 5 man-hours 

TLMC, CH 5, PART 4 REQUIREMENT YES NO 

KITS and/or PARTS YES NO 

TOOLING/GSE YES NO 

PLANNING INFORMATION: See important 

information at the start of Paragraph 1. YES NO 

DEDICATED SCHEDULE YES NO 

PREREQUISITE SERVICE BULLETINS: N/A 

NOTES: This Service Bulletin is expected to be the subject of an Airworthiness Directive 

which will make it necessary to implement this Service Bulletin. 

Due to a limited quantity of spare accumulators, we strongly suggest that the 

Service Bulletin be accomplished only at the due cycle.

To place an order for parts or kits, please call Bombardier Parts Logistics at: 

514-855-2999 or 1-866-538-1247 
Refer to applicable governmental agency regulations and requirements and make sure that the work described in this 

Service Bulletin is performed in compliance with manufacturer’s recommendations and/or acceptable industry 

standards. 

This document is proprietary to Bombardier Inc. and/or its affiliates and may not be reproduced or copied in any form or 

by any means without the prior written consent of Bombardier Inc. and/or its affiliates. 

© 2010 Bombardier Inc. All rights reserved 

Challenger*, Global Express*, Global Express XRS*, Global 5000*, Learjet* are Trademarks of Bombardier Inc. 

Basic Issue: Dec 16/2010 100-29-14

Page 1 of 9 

SERVICE BULLETIN 

This Service Bulletin is available at: 

www.cic.bombardier.com

BD-100-1A10 (CL-300)

ATA 29-21 

HYDRAULIC POWER 

SPECIAL CHECK/MODIFICATION – AUXILIARY HYDRAULIC SYSTEM – 

REPLACEMENT OF ACCUMULATOR, PART NO. 900095-1 

1. PLANNING INFORMATION 

NOTES: 1. This Service Bulletin is applicable to all auxiliary hydraulic system 

accumulators (herein referred to as accumulator), Part No. 900095-1 

which does not have the letter “E” as part of the suffix stamped on the 

serial number plate. 

2. This Service Bulletin is also applicable for the auxiliary hydraulic system 

accumulators in the operator’s stock room with Part No. 900095-1 which 

do not have the letter “E” as part of the suffix stamped on the serial 

number plate. 

A. Effectivity 

BD-100-1A10 aircraft, Serial No. 20003 to 20335. 

NOTE: The instructions given 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 Aerospace Service Bulletin(s). 

Before you do this bulletin, examine all STC, STA or equivalent action 

changes to make sure that this bulletin can be completed. 
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B. Reason 

Field evidence has shown from the Regional Jet family that the screw caps of 

the accumulator are susceptible to cracking after 3500 flight cycles. This could 

possibly lead to a screw cap release, which in turn may cause damage to the 

aircraft structure and/or systems. 

This Service Bulletin gives instructions to inspect and if required, replace the 

accumulator in accordance with the compliance given in Paragraph 1.D. with a 

new or repaired unit with the same part number that has the letter “E” as part of 

the suffix stamped on the serial number plate. 

C. Description 

This Service Bulletin gives instructions to: 

– Get access to the auxiliary hydraulic system, 

– Inspect the accumulator to determine: 

– If the accumulator must be replaced, or 

– If the accumulator requires identification. 

– If the unit must be replaced, remove the accumulator, 

– Return the removed accumulator for a new or repaired unit, 

– Install the new or repaired accumulator, and 

– Do the necessary tests to make sure the system operates correctly. 

D. Compliance 

For accumulators that have less than 3150 flight cycles at the release date of this 

Service Bulletin, replace the accumulator before 3500 flight cycles. 

For accumulators that have more than 3150 flight cycles at the release date of 

this Service Bulletin, replace the accumulator within the next 350 flight cycles. 

For accumulators where the flight cycles are unknown and accumulators that 

have been replaced and history of replaced hydraulic accumulators is unknown at 

the release date of this Service Bulletin, replace the accumulator within the next 

350 flight cycles. 

NOTE: Due to a limited quantity of spare accumulators, we strongly suggest that 

the Service Bulletin be accomplished only at the due cycle. 

E. Approval 

The technical content of this Service Bulletin has been approved under 

the authority of Transport Canada Civil Aviation (TCCA) Design Approval 

Organization (DAO) No. DAO #93-Q-02. 

NOTES: 1. The technical content of this Service Bulletin is accepted by the 

FAA under the Canada/USA bilateral Aviation Safety Agreement. 

2. The technical content of this Service Bulletin is accepted by the 

JAA and by EASA in accordance with established procedures. 
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F. Manpower 

NOTES: 1. The man-hours given are estimates to help you schedule the tasks 

given in this bulletin. The estimates are for direct labor performed by 

an experienced crew and do not include the time for familiarization, 

planning, aircraft preparation in hangar such as towing and 

positioning of scaffolds, removal of interior furnishings, repainting, 

supervision and inspection. 

For more information related to the manpower estimates, refer to 

SB 100-00-02. 

2. This Service Bulletin may require consumable materials that have 

specific curing times (refer to Paragraph 3). The accumulated curing 

time is not included in the labor estimates and should be considered 

for planning purposes before you schedule this Service Bulletin. 

1 man-hour is necessary to do the special check. 

4 man-hours are necessary to do the modification. 

The labor required to do the special check and modification of this Service 

Bulletin is at no cost if: 

(i) the work is done during new aircraft warranty period, and 

(ii) the work is done at Bombardier Business Aviation Services (BBAS) 

or Authorized Service Facilities (ASF), and 

(iii) accumulator flight cycles are unknown or greater than 3150. 

G. Material - Cost and Availability 

No kit is necessary to do this modification. For material data, refer to 

Paragraph 3. 

Accumulator, Part No. 900095-1 with the suffix “E” stamped on the serial number 

plate is required to do this Service Bulletin, and is available at no cost if a nocharge purchase order is sent to Bombardier Aerospace within the time 

compliance given in Paragraph 1.D. 

Return Accumulator, Part No. 900095-1 and which does not have the letter “E” as 

part of the suffix stamped on the serial number plate (except the serial numbers 

listed in Table 1 and Serial Nos. 60199-1413 to 60199-1553 of Parker, Service 

Bulletin, 900095-1-29-394), to the address shown below: 

Learjet Core Returns 

8219 West Irving, Bldg 9, Dock 9, 

Wichita, KS 67209 

USA 
MODEL BD-100-1A10 (CL-300) 

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This Service Bulletin is covered by a dedicated schedule. To ensure a timely 

and effective return/upgrade program, advance scheduling is required through 

our In-Service Implementation Team (ISIT). Please contact your Regional 

Manager (RM), Field Service Representative (FSR) or Customer Service 

Representative (CSR) as soon as is practical to schedule your aircraft. 

During or after the above free period, Smart Parts Plus does not pay for the part. 

H. Tooling 

GSE REFERENCE NO. PART NO. DESCRIPTION 

24-00-24 S4933959-501 Tag, Circuit Breaker 

Commercially Available - Container, Hydraulic Fluid, 

1 U.S. gal (3.79 L) 

Commercially Available - Wrench, Torque 

NOTES: 1. Refer to the BD-100 Illustrated Tool and Equipment Manual to make 

sure that you use the correct equipment configuration. 

2. Refer to the Liability Statement for acceptable GSE equivalents. 

I. Weight and Balance 

No change. 

J. Electrical Load Data 

No change. 

K. References 

– Bombardier Aerospace, Restriction and/or Special Instruction (RSI), 

C-100-000-29-0055, Rev. B. 

– BD-100 Aircraft Maintenance Manual (AMM), Chapters 6, 12, 24, 29, and 52. 

– BD-100 Standard Practices Manual (SPM), Chapter 51. 

– Parker, Service Bulletin, 900095-1-29-394. 

L. Other Publications Affected 

– BD-100 Aircraft Illustrated Parts Catalog (AIPC), Chapter 29. 

M. Equivalent Service Bulletin 

None. 
MODEL BD-100-1A10 (CL-300) 

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2. ACCOMPLISHMENT INSTRUCTIONS 

NOTES: 1. All TASKs referenced in the procedures that follow are from the 

BD-100 Aircraft Maintenance Manual, unless otherwise specified. 

2. All references made to zones, access panels and/or doors, are 

from the BD-100 Aircraft Maintenance Manual, Chapter 6. 

A. Aircraft Setup 

(1) Obey all the electrical/electronic safety precautions. Refer to 

TASK 24-00-00-910-801. 

(2) Obey all the hydraulic safety precautions. Refer to TASK 29-00-00-910-801. 

(3) Obey all the hydraulic technical precautions. Refer to TASK 29-00-00-910-802. 

(4) Open and tag the circuit breaker that follows: 

LOCATION CB NO. NAME ZONE 

LCBP D10 AUX HYDRAULIC DC PUMP 211 

(5) Release the hydraulic pressure from the auxiliary hydraulic system. Refer to 

TASK 29-20-00-862-802. 

(6) Open the aft equipment-compartment door 182GL. Refer to 

TASK 52-41-00-010-801. 

B. Special Check 

(1) Examine the Accumulator, Part No. 900095-1, to make sure that the letter “E” 

is not part of the suffix stamped on the serial number plate, and if: 

(a) The suffix “E” is not part of the suffix stamped on the serial number plate, 

go to Paragraph 2.B.(2). 

(b) If the suffix “E” is part of the suffix stamped on the serial number plate, 

go to Paragraph 2.E. 
MODEL BD-100-1A10 (CL-300) 

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(2) For accumulator serial number “60199-1413 to 60199-1553”, or the serial 

numbers listed in Table 1 below, permanently stamp the suffix “E” on the 

serial number plate, and go to Paragraph 2.E. 

Table 1: Units Repaired and Require “E” Marking 

60199-0030 60199-1084 60199-1168 

60199-0034 60199-1123 60199-1258 

60199-0090 60199-1140 60199-1275 

60199-0097 60199-1145 60199-1282 

60199-0119 60199-1158 60199-1308 

60199-0230 60199-1159 60199-1310 

60199-1060 60199-1166 60199-1329 

60199-1061 60199-1167 60199-1381 

NOTE: For the serial numbers listed above, the new screw caps were 

installed and end caps were replaced or verified, but is necessary 

to incorporate Parker Service Bulletin, 900095-1-29-394 to add the 

letter “E” to the serial number. 

(3) If the accumulator serial number is not listed in Paragraph 2.B.(2), go to 

Paragraph 2.C. 

C. Modification 

(1) Remove the accumulator. Refer to TASK 29-21-13-000-801. 

(2) Return the accumulator to the address shown in Paragraph 1.G. 

NOTES: 1. Make sure that the flight cycles of the accumulator are recorded 

and that the information is returned with the unit. 

2. If the flight cycles are not known, enter “flight cycles unknown”. 

(3) Install a new or repaired accumulator, Part No. 900095-1 with the letter “E” 

as part of the suffix stamped on the serial number plate. Refer to TASK 

29-21-13-400-801. 
MODEL BD-100-1A10 (CL-300) 

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D. Testing 

(1) Remove the tag and close the circuit breaker that follows: 

LOCATION CB NO. NAME ZONE 

LCBP D10 AUX HYDRAULIC DC PUMP 211 

(2) Do a servicing of the accumulator. Refer to TASK 12-12-00-614-801. 

(3) Pressurize the auxiliary hydraulic system. Refer to TASK 29-20-00-862-801. 

NOTE: Make sure that there is no hydraulic fluid leakage around the 

accumulator. 

(4) Bleed the auxiliary hydraulic system. Refer to TASK 29-20-00-870-801. 

(5) Do a servicing of the auxiliary hydraulic system. Refer to 

TASK 12-12-00-611-801. 

(6) Clean all the hydraulic fluid leakage from the work area. Refer to 

SPM-MM TASK 51-25-00-110-801. 

E. Close-out 

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

(2) Close the aft equipment-compartment door 182GL. Refer to 

TASK 52-41-00-410-801. 

F. Recording 

When this Service Bulletin is completed, make an entry in the aircraft log and 

send the attached Incorporation Notice to Bombardier Business Aircraft Customer 

Services (BBACS). 
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3. MATERIAL INFORMATION 

A. Kit 

No kits required. 

B. Parts 

The part that follows is necessary to do this Service Bulletin and is available from 

Bombardier Aerospace Parts Logistics, Montreal: 

NEW 

PART NO. 

QTY ITEM USED 

PART NO. 

INSTRUCTIONS - 

DISPOSITION 

900095-1 with 

the letter “E” as 

part of the suffix 

stamped on the 

serial number 

plate. 

1 Accumulator, 

Auxiliary 

Hydraulic 

900095-1 Refer to 

Paragraph 1.G. 

NOTE: The part number for the item listed above is subject to change without 

revision to this Service Bulletin. In case of discrepancy between this list 

and any other list, the Illustrated Parts Catalog prevails and shall be used 

to determine the latest part number. 
MODEL BD-100-1A10 (CL-300) 

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Page 9 of 9 

C. Material 

The materials that follow, or equivalent, are necessary to do this Service Bulletin. 

These can be purchased from a local supplier. .Bombardier Aerospace does not 

pay for these consumables. 

DESCRIPTION PART 

No./NAME 

SPECIFICATION QUANTITY SUPPLIER

(See Note)

Fluid, 

Hydraulic, 

Phosphate 

Ester 

Fire-Resistant 

HYJET IV-A BAMS 564-003 As 

Necessary 

Code: A 

Nitrogen - BB-N-411, 

Type 1, Class 1 

As 

Necessary 

Code: B 

NOTES: 1. Refer to the table that follows for each supplier’s address listed by 

codes. 

2. The Curing Time (CT), if applicable, for each consumable material is 

indicated with the description of each product. 

3. At time of release of this Service Bulletin, the information on the 

supplier was valid and accurate. In the event that this information 

has changed, the operator is encouraged to use the World Wide 

Web to find a local supplier. 

SUPPLIERS ADDRESSES BY CODES 

Code: A 

Exxon Mobil 

3225 Gallows Road 

Fairfax, VA 22037 

U.S.A. 

Tel.: 1-800-662-4525 

Fax: 1-703-846-6693 

www.exxonmobile.com

Code: B 

Commercially Available 

D. Publications 

No publications required. 
THANK YOU FOR YOUR RESPONSE! 

PLEASE RETURN THIS COMPLETED EVALUATION FORM BY MAIL, E-MAIL OR FAX

SERVICE BULLETIN EVALUATION FORM 

(Your ideas will help us provide better bulletins) 

SERVICE BULLETIN: 100-29-14 ISSUE: Basic DATED: Dec 16/2010 

TITLE: Special Check/Modification – Auxiliary Hydraulic System – Replacement of 

Accumulator, Part No. 900095-1 

STRONGLY 

DISAGREE 

DISAGREE AGREE STRONGLY 

AGREE 

N/A 

x Instructions to do the Service Bulletin 

were accurate. 

Comments:

    

x Illustration(s), figure(s), and/or kit drawing(s) 

were helpful to carry out instructions. 

Comments:

    

x If a kit and/or parts were required, did the 

contents of the kit and/or parts received agree 

with the contents listed in the bulletin? 

Comments:

    

x The consumable materials listed under 

Paragraph 3 were easily procured. 

 Comments:

    

x Work was accomplished in the prescribed time.

Comments:

    

x Overall, I was satisfied with this Service Bulletin. 

 Comments:

    

For 

administrative 

use only 

PLEASE SUPPLY US WITH THE FOLLOWING DATA AND FAX TO: (514) 855-7634 

or 

E-MAIL TO: MTL_BBAD_SB_Evaluation@aero.bombardier.com

OPERATOR:

052NI AIRCRAFT SERIAL NO.:

TELEPHONE:

FACSIMILE:

NAME: (Please print) 
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 

Bombardier Business Aircraft Customer Services (BBACS) 

P.O. Box 6087, Station Centre-ville 

Montréal, Québec, Canada H3C 3G9 

Attention: Customer Support Department 

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SERVICE BULLETIN INCORPORATION SHEET – “100-29-14” BOMBARDIER SUBMISSION

Upon completion of the Service Bulletin, please fill-in, fax to 

(514) 855-8798 or e-mail to Fracas at fracas.montreal@aero.bombardier.com

If your aircraft is registered on CAMP and you are reporting to them, 

please do not send the incorporation sheet to Bombardier. If your aircraft 

is on another tracking system, please contact Bombardier to make 

arrangements for automated data submission. 

 COMPLIED WITH

Service Bulletin 

Number 

Rev. * Parts 

Completed 

YES NO N/A Remarks/Reason 

100-29-14 Basic - 

- - - 

- - - 

Actual hours to accomplish Service Bulletin: 

1. Where the Service Bulletin is divided into a number of parts (e.g., PARTS A, 

B, C, D, etc.) which can be carried out separately, indicate only those parts 

completed at this time. 

2. For repetitive checks (usually PART A) only the initial check should be 

reported unless otherwise stated in the Service Bulletin. 

* NOTES: 

3. When more than one part is carried out at the same time, each part should be 

reported. 

Aircraft Serial No. Aircraft Reg. No. 

Airframe Hours: Airframe Landings 

S.B. Incorporation date Service Order No. 

(dd/mm/yy) 

Facility Incorporating S.B. 

Name Signature Date 

Signature not required if sent by E-Mail (dd/mm/yy) 
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 

Bombardier Business Aircraft Customer Services (BBACS) 

P.O. Box 6087, Station Centre-ville 

Montréal, Québec, Canada H3C 3G9 

Attention: Customer Support Department, Maintenance Engineering 

-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --