# Bombardier Service Bulletin 100-32-35

Copy: No revision named ("SB 100-32-35 Basic"), 12 pages: PDF https://openairdocs.org/files/sha256/39/97/3997a33d4a6fefacb429e07d494b7671460acbb4d61cc8f21d7c28230eaab4e4; text https://openairdocs.org/service-documents/bombardier/sb-100-32-35/file/3997a33d4a6f.md. Rights: © Bombardier Inc. Filed by the FAA in regulations.gov docket FAA-2022-0016; AD 2022-09-02 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication.

## Details

- Manufacturer: [Bombardier](https://openairdocs.org/service-documents/bombardier.md)
- Type: Service bulletin (Service Bulletin)
- Number: 100-32-35
- Page: https://openairdocs.org/service-documents/bombardier/sb-100-32-35

## ADs that cite it (1) (OpenAirDocs)

Newest first, with the revision each names, as OpenAirDocs read it from the AD's text.

- [AD 2022-09-02](https://openairdocs.org/ad/2022-09-02.md), effective Jun 16, 2022: No revision named

Also cited in [1 proposed AD](https://openairdocs.org/service-documents/bombardier/sb-100-32-35/proposed.md).

## Text (12 pages)

Rights: © Bombardier Inc. Filed by the FAA in regulations.gov docket FAA-2022-0016; AD 2022-09-02 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication. Each page's text from the PDF; open the PDF at a page with #page=N.

### Page 1

Aug 17/2021 100-32-35 
 Page 1 of 1  
SERVICE BULLETIN INFORMATION SHEET 
MODEL BD-100-1A10 (CH-300)  
ATA 32-51 
LANDING GEAR 
MODIFICATION — NOSE WHEEL STEERING CONTROL SYSTEM— 
REPLACEMENT OF THE NOSE WHEEL STEERING SELECTOR VALVE 
 
Service Bulletin No.: 100-32-35 Issue: Basic Dated: Mar 30/2021 
The following data is supplied for information only.  No revision to the Service Bulletin 
is necessary. 
Keep this Information Sheet with subject Service Bulletin. 
This Information Sheet is issued to update the references in Paragraph 1.K.        
Safran Landing Systems, Service Bulletin SB100-32-029 has been added and now reads 
as follows:  
1. K. References 
−  Bombardier Aviation, Restriction and/or Special Instruction (RSI), 
C−100−000−32−0174, Rev. −− . 
−  Bombardier Aviation, Modification Summary, 100T010983 Rev. B. 
−  Bombardier Aviation, System Definition Drawing (SDD), S1003250001, Rev. L. 
−  Bombardier Aviation, Standard Practices Manual (SPM), Chapter 20. 
−  Bombardier Aviation, SB 100−00−002, Service Bulletin Description and Policy. 
−  Safran Landing Systems, Component Maintenance Manual (CMM), Chapter 32. 
−  Safran Landing Systems, Service Bulletin SB100-32-029.  
−  CH 300 Aircraft Maintenance Manual (AMM), Chapters 6, 24, 29 and 32. 
−  CH 300 Illustrated Tool and Equipment Manual (ITEM) Chapters 7, 24 and 32.

### Page 2

MODIFICATION — NOSE WHEEL STEERING CONTROL SYSTEM—
REPLACEMENT OF THE NOSE WHEEL STEERING SELECTOR VALVE
The information below is provided for your reference. For full details, including labor and part
coverage, 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 20500
MANPOWER: 4.0 man−hours
CONTINUED AIRWORTHINESS (CAW)
FLEET CAMPAIGN YES NO
TLMC, CH 5 AFFECTED NOYES
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
NOTE: This Service Bulletin may be subject to an Airworthiness Directive which will make
it necessary to implement this Service Bulletin.
To place an order for parts or kits, please call Bombardier Aviation Parts Services at:
514−855−2999 or 1−866−538−1247
SERVICE BULLETIN SUMMARY
my.businessaircraft.bombardier.com
MODEL BD−100−1A10 (CH−300)
ATA 32−51
LANDING GEAR
Basic Issue: Mar 30/2021 100−32−35
Page 1 of 1
This Service Bulletin is available at:

### Page 3

MODIFICATION — NOSE WHEEL STEERING CONTROL SYSTEM—
REPLACEMENT OF THE NOSE WHEEL STEERING SELECTOR VALVE
1. PLANNING INFORMATION
NOTES:1 . Before you do this Service Bulletin, examine all STC, STA or
equivalent action changes to make sure that this Service Bulletin can
be completed.
2. This Service Bulletin is covered by a dedicated schedule. Dedicated
schedules are used to reserve and manage inventory due to limited
availability of rotable stock, parts and/or kits. Parts are limited, therefore,
advance part scheduling with our In−Service Implementation Team (ISIT)
is recommended prior to a maintenance visit. Please contact your
Regional Manager (RM), Field Service Representative (FSR) or Customer
Service Representative (CSR) to schedule your aircraft as there is a
limited availability. The parts will be allocated on a first come first serve
basis.
For more information on dedicated schedules, refer to SB 100−00−02.
A. Effectivity
BD−100−1A10 aircraft, Serial No. 20003 to 20500.
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 Aviation Service Bulletin(s).
SERVICE BULLETIN
my.businessaircraft.bombardier.com
MODEL BD−100−1A10 (CH−300)
ATA 32−51
LANDING GEAR
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.
 2021 Bombardier Inc.  All rights reserved
Learjet, Challenger, Global, are registered trademarks of Bombardier Inc. or its subsidiaries.
Basic Issue: Mar 30/2021 100−32−35
Page 1 of 8
This Service Bulletin is available at:

### Page 4

B. Reason
It has been reported that the existing Nose Wheel Steering Selector Valve (SSV)
has been found to show slow deactivation response times under low temperature
and/or contaminated fluid operating conditions. This can result in slow shut−off of
hydraulic power to the Nose Wheel Steering System.
This Service Bulletin replaces the existing SSV, Part No. 41130−107 with the
redesigned SSV Part No. 41130−111.
C. Description
This Service Bulletin gives instructions to:
− Remove the steering selector valve assembly from the aircraft,
− Install the new steering selector valve assembly on the aircraft, and
− Do the necessary tests to make sure that the system operates correctly.
D. Compliance
Recommended within 36 months from this Service Bulletin release date (Basic
Issue).
NOTE: If it is not possible to complete all the instructions in this Service Bulletin
because of the aircraft configuration, submit an SRPSA for analysis and to
get an approved disposition to complete this Service Bulletin.
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 EASA
under the Canada/EU bilateral Aviation Safety Agreement.
MODEL BD−100−1A10 (CH−300)
Basic Issue: Mar 30/2021 100−32−35
Page 2 of 8

### Page 5

F. Manpower
NOTES: 1. The man−hours given are to help you schedule the tasks given in this
bulletin. The man−hours 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, refer to SB
100−00−002.
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 man−hours and should be considered for
planning purposes before you schedule this Service Bulletin.
4.0 man−hours are necessary to do this modification.
Bombardier Aviation does not pay for this Recommended Service Bulletin, at any
time.
G. Material − Cost and Availability
No kit is necessary to do this special check/modification.
For parts data refer to Paragraph 3. B.
The SSV, Part No. 41130−111, is necessary to do this modification and is available
at no cost if a no−charge purchase order is sent to Bombardier Aviation in less than
36 months, from this Service Bulletin release date (Basic Issue).
This Service Bulletin is covered by a dedicated schedule. Dedicated schedules are
used to reserve and manage inventory due to limited availability of rotable stock,
parts and/or kits. Parts are limited, therefore, advance part scheduling with our
In−Service Implementation Team (ISIT) is recommended prior to a maintenance
visit. Please contact your Regional Manager (RM), Field Service Representative
(FSR) or Customer Service Representative (CSR) to schedule your aircraft as there
is a limited availability. The parts will be allocated on a first come first serve basis.
For more information on dedicated schedules, refer to SB 100−00−02.
Bombardier Aviation is maintaining a rotable pool of replacement Steering Selector
Valves (SSV), to be supplied to the operators under the terms and conditions given
below:
− The old SSV, Part No. 41130−107 must be returned to Bombardier Aviation,
Parts Services in less than 10 days for domestic shipments and 15 days for
International shipments of receipt of replacement unit.
− If the old SSV, is not returned within the time period stated above, the operator
will be charged for the replacement unit at full cost.
MODEL BD−100−1A10 (CH−300)
Basic Issue: Mar 30/2021 100−32−35
Page 3 of 8

### Page 6

Send the old SSV, Part No. 41130−107 to Bombardier Aviation at one of the two
addresses given below:
Learjet Inc. − Core Returns
251−A Wille Road
Des Plaines, Illinois
60018−1861
USA
or
Distribution Centre Frankfurt − Core Returns
Bombardier Aviation Company GmbH
Hans−Boeckler−Strasse 9
GROSS−GERAU Hesse 64521
Germany
For all parts transactions, Bombardier Aviation’s current Spare Parts and
Component Repair Price Catalogue General Terms and Conditions apply. These
terms and conditions are found on the Bombardier Customer Portal at:
my.businessaircraft.bombardier.com
Smart Parts Plus does not pay for the part at any time.
H. Tooling
The equipment and tools listed below are necessary to do this Service Bulletin:
GSE REFERENCE NO. PART NO. DESCRIPTION
24−00−24 S4933959−501 Tag, Circuit Breaker
Commercially Available − Container, HydraulicFluid
Commercially Available − Wrench, Torque
NOTES: 1. Refer to the CH 300 Illustrated Tool and Equipment Manual (ITEM) to
make sure that you use the correct equipment configuration.
2. Refer to the Liability Statement in the ITEM for the CH 300, for
acceptable GSE equivalents.
I. Weight and Balance
No change.
J. Electrical Load Data
No change.
MODEL BD−100−1A10 (CH−300)
Basic Issue: Mar 30/2021 100−32−35
Page 4 of 8

### Page 7

K. References
− Bombardier Aviation, Restriction and/or Special Instruction (RSI),
C−100−000−32−0174, Rev. −− .
− Bombardier Aviation, Modification Summary, 100T010983 Rev. B.
− Bombardier Aviation, System Definition Drawing (SDD), S1003250001, Rev. L.
− Bombardier Aviation, Standard Practices Manual (SPM), Chapter 20.
− Bombardier Aviation, SB 100−00−002, Service Bulletin Description and Policy.
− Safran Landing Systems, Component Maintenance Manual (CMM), Chapter 32.
− CH 300 Aircraft Maintenance Manual (AMM), Chapters 6, 24, 29 and 32.
− CH 300 Illustrated Tool and Equipment Manual (ITEM) Chapters 7, 24 and 32.
L. Other Publications Affected
− CH 300 Aircraft Illustrated Parts Catalog (AIPC), Chapter 32.
M. Equivalent Service Bulletin
For the Challenger 350 aircraft, use Service Bulletin 350−32−011.
2. ACCOMPLISHMENT INSTRUCTIONS
NOTES: 1. All TASKs given in the procedures that follow are from the CH 300, Aircraft
Maintenance Manual unless otherwise specified.
2. All references made to zones, access panels and/or doors, are from the
CH 300, Aircraft Maintenance Manual, Chapter 6.
A. Aircraft Setup
NOTE: The steps in the Aircraft Setup section of this Service Bulletin are
recommended steps. The steps give a recommendation to get access to
the work area. This recommendation is to give a safe work area and to
minimize possible damage to surrounding aircraft parts. Alternative steps
can be used at the operator’s discretion.
(1) Obey all electrical/electronic safety precautions. Refer to
AMM 24−00−00−910−801.
(2) Obey all the hydraulic safety precautions. Refer to AMM 29−00−00−910−801.
(3) Obey all the hydraulic technical precautions. Refer to
AMM 29−00−00−910−802.
(4) Obey all the landing−gear safety precautions. Refer to
AMM 32−00−00−910−801.
MODEL BD−100−1A10 (CH−300)
Basic Issue: Mar 30/2021 100−32−35
Page 5 of 8

### Page 8

B. Modification
NOTE: If it is not possible to complete all the instructions in this Service Bulletin
because of the configuration of the aircraft, submit an SRPSA for analysis
and to get an approved disposition to complete this Service Bulletin.
(1) Remove the steering selector valve, Part No. 41130−107. Refer to
AMM 32−51−09−000−801.
(2) Install the new steering selector valve, Part No. 41130−111. Refer to
AMM 32−51−09−400−801.
C. Testing
(1) Do the operational test of the steering selector valve. Refer to
AMM 32−51−09−710−801.
(2) Do the operational test of the nose wheel steering control system. Refer to
AMM 32−51−00−710−801.
(3) Make sure there is no hydraulic fluid leakage at the steering selector valve.
D. Close−out
NOTE: The steps in the Close−out section of this Service Bulletin, except for the
return−to−service tests, are recommended steps. The steps give a
recommendation to install components removed during the Aircraft Setup.
This recommendation is to make sure that the aircraft is safe and ready to
return to service. Alternative steps can be used at the operator’s
discretion.
(1) Remove all tools, equipment and unwanted materials from the aircraft.
E. 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).
For information, correction(s), comments(s) and/or feedback regarding Service
Bulletins released on the Customer Portal, please contact the Service Bulletin
Group at the following email address:
bbad_SBgroup@aero.bombardier.com
3. MATERIAL INFORMATION
A. Kits
No kits required.
B. Parts
The part that follows is necessary to do this Service Bulletin:
MODEL BD−100−1A10 (CH−300)
Basic Issue: Mar 30/2021 100−32−35
Page 6 of 8

### Page 9

NEW PART NO. QTY ITEM USED PARTNO. INSTRUCTIONS- DISPOSITION
41130−111 1
Steering
Selector
Valve
41130−107 Refer to Para1.G.
NOTE: The part numbers for the items listed above are 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.
C. Material
The materials that follow, or equivalent, are necessary to do this Service Bulletin.
These can be purchased from a local supplier. Bombardier Aviation does not pay
for these consumable.
DESCRIPTION PARTNO./NAME SPECIFICATION QUANTITY
SUPPLIER
(SEE
NOTE)
Grease,
Aircraft and
Instrument,
Gear and
Actuator
Screw
Aeroshell 33 MIL−PRF−23827CType I As Necessary Code: A
Compound,
Sealing,
Pressure and
Environmental,
Non
Chromate
AC−735 BAMS 552−008Class B As Necessary Code: B
Compound,
Sealing,
Pressure and
Environmental,
Non
Chromate
MC−780 BAMS 552−008Class B As Necessary Code: C
MODEL BD−100−1A10 (CH−300)
Basic Issue: Mar 30/2021 100−32−35
Page 7 of 8

### Page 10

DESCRIPTION PARTNO./NAME SPECIFICATION QUANTITY
SUPPLIER
(SEE
NOTE)
Compound,
Sealing and
Coating,
Corrosion
Inhibitive
− MIL−PRF−81733 As Necessary Code: D
NOTES: 1. Refer to the table that follows for each suppliers 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
Shell Canada Limited
400 4th Avenue S.W.
Calgary, Alberta
Canada, T2P 0J4
Tel.: 1−877−656−3111
www.shell.ca
Code: B
3M
7341 Anaconda Ave.
Garden Grove, CA
U.S.A. 92841
Tel.:
www.3M.com
Code: C
Chemetall GmbH
Innerstetal 2,
Langelsheim, 03, DE
38685
Tel.: 1−877−656−3111
www.shell.ca
Code: D
Commercially Available
D. Publications
No publications required.
MODEL BD−100−1A10 (CH−300)
Basic Issue: Mar 30/2021 100−32−35
Page 8 of 8

### Page 11

100−32−35 Basic Mar 30/2021
MODIFICATION — NOSE WHEEL STEERING CONTROL SYSTEM—
REPLACEMENT OF THE NOSE WHEEL STEERING SELECTOR VALVE
bbad_SBgroup@aero.bombardier.com
NOTE: Please use Salesforce only for troubleshooting issues or when Engineering
deviation is necessary to accomplish the Service Bulletin modification.
SERVICE BULLETIN EVALUATION FORM
(Your ideas will help us provide better bulletins)
SERVICE BULLETIN: ISSUE: DATED:
TITLE:
For any information, correction(s), comment(s) and/or feedback regarding Service
Bulletins released on the Customer Portal, please contact the Service Bulletin Group
at the following email address:

### Page 12

SERVICE BULLETIN INCORPORATION SHEET − "100−32−35"
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 you’re reporting Service Bulletin (SB) Incorporations to CAMP, sending
this Incorporation Sheet to Bombardier is not mandatory. If your aircraft is
on another tracking system, please contact Bombardier to make arrangements
for automated data submission.
100−32−35 Basic
COMPLIED WITH
YES    NO    N/A
Actual hours to accomplish Service Bulletin:
* NOTES:
Aircraft Serial No. Aircraft Reg. No.
Airframe Hours: Airframe Landings
S.B. Incorporation Date Service Order No.
Facility incorporating S.B.
Name Signature Date
BOMBARDIER
SUBMISSION
Service Bulletin
Number
Rev. * Parts
Completed
Remarks/Reason
(Mandatory if N/A)
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.
3. When more than one part is carried out at the same time, each part should
be reported.
4. Fill in ’Remark/Reason’ to explain compliance method when N/A is selected.(E.g. Part
not installed, N/A by effectivity, N/A by Part Serial Number, etc.
5. PCW means ’Previously Complied With’.
(dd/mm/yy)
Signature not required if sent by E−Mail (dd/mm/yy)

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