# Bombardier Service Bulletin 650-32-007

Copy: No revision named ("SB 650-32-007"), 13 pages: PDF https://openairdocs.org/files/sha256/77/f9/77f95bc928bf1509f8d3076dde1cf1a683dec3191ccb469c246c6fdb3f5f9df6; text https://openairdocs.org/service-documents/bombardier/sb-650-32-007/file/77f95bc928bf.md. Rights: © Bombardier Inc. Filed by the FAA in regulations.gov docket FAA-2025-1732; AD 2026-07-01 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: 650-32-007
- Page: https://openairdocs.org/service-documents/bombardier/sb-650-32-007

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

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

- [AD 2026-07-01](https://openairdocs.org/ad/2026-07-01.md), effective May 8, 2026: No revision named

Also cited in [1 proposed AD](https://openairdocs.org/service-documents/bombardier/sb-650-32-007/proposed.md).

## Text (13 pages)

Rights: © Bombardier Inc. Filed by the FAA in regulations.gov docket FAA-2025-1732; AD 2026-07-01 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

MODIFICATION – NOSEWHEEL STEERING –
REPLACEMENT OF POTENTIOMETER UNIVERSAL COUPLING (T16-6) SETSCREWS
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
Within 36 months from this Service Bulletin
release date (Basic Issue)
EFFECTIVITY: A/C Serial No. 6050 to 6193
MANPOWER: 4 man−hours
CONTINUED AIRWORTHINESS (CAW)
FLEET CAMPAIGN NOYES
TLMC, CH 5 AFFECTED 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 NOYES
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 kit, please call Bombardier Aviation Parts Services at:
514−855−2999 or 1−866−538−1247
SERVICE BULLETIN SUMMARY
my.businessaircraft.bombardier.com
MODEL CL−600−2B16
ATA 32−51
LANDING GEAR
Basic Issue: Oct 30/2023 650−32−007
Page 1 of 1
This Service Bulletin is available at:

### Page 2

MODIFICATION – NOSEWHEEL STEERING –
REPLACEMENT OF POTENTIOMETER UNIVERSAL COUPLING (T16-6) SETSCREWS
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. The Time Limits/Maintenance Checks (TLMC) is impacted by this Service
Bulletin. Refer to the applicable TLMC RS references.
3. After the incorporation of this Service Bulletin for any future rigging/part
replacement of the NWS rudder potentiometer, Operators must use the
content of TR 32−10, TR 32−11 and TR 32−12 or an AMM incorporating
the intent of TR 32−10, TR 32−11 and TR 32−12 (new self−locking
setscrew, new torque value and application of anaerobic retaining
compound).
4. The AMM tasks referenced in SB 650−32−007 as “Post SB 650−32−007”
shall be found in TR 32−10, TR 32−11 and TR 32−12 or in the AMM
revision Incorporating the intent of TR 32−10, TR 32−11 and TR 32−12.
A. Effectivity
CL−600−2B16 aircraft, Serial No. 6050 to 6193.
All other subsequent CL−600−2B16 aircraft are scheduled for the modification in
production (Ref.: Modification Summary 600−13625).
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 CL−600−2B16
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.
 2023 Bombardier Inc.  All rights reserved
Learjet, Challenger, Global, are registered trademarks of Bombardier Inc. or its subsidiaries.
Basic Issue: Oct 30/2023 650−32−007
Page 1 of 10
This Service Bulletin is available at:

### Page 3

B. Reason
1. Condition:
Due to rudder pedal potentiometer universal coupling setscrews possibly having
inadequate torque and the use of only self−locking setscrews (no anaerobic
retaining compound).
2. Evidence:
There is one report of uncommanded steering resulting in lateral runway
excursion due to the rudder pedal potentiometer universal coupling not properly
clamping the potentiometer shaft. This resulted in the pedals moving the
potentiometer in one direction only (ratcheting). Due to normal repeated usage
at landing, the potentiometer was not following pedal command.
3. Objective/Benefit:
The Service Bulletin instructs to replace the T16−6 coupling setscrews,
application of anaerobic retaining compound and rigging of nosewheel steering
alignment if required and also replace the coupling if necessary.
C. Description
This Service Bulletin gives instructions to:
− Gain access to potentiometer universal coupling,
− Visually inspect the coupling for any damage and replace if necessary,
− Remove and discard the existing setscrews (one at a time),
− Install the new setscrews (one at a time),
− Verify the rudder pedal potentiometer voltage and rig if necessary,
− If required, replace the potentiometer, 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. Standard
SRPSA fees may apply. Refer to the Services section of the Bombardier
customer portal for the latest prices, rates and fees.
MODEL CL−600−2B16
Basic Issue: Oct 30/2023 650−32−007
Page 2 of 10

### Page 4

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 EASA
under the Canada/EU bilateral Aviation Safety Agreement.
F. Manpower
NOTES: 1. The man−hours given are to help you schedule the tasks given in this
Service 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 650−00−002.
2. This Service Bulletin may require consumable materials that have
specific curing times (refer to Paragraph 3.C). The accumulated
curing time is not included in the man−hours and should be
considered for planning purposes before you schedule this Service
Bulletin.
3. Labor hours are based on the fact that the modification will be done at
the next scheduled maintenance task or inspection. Therefore no
man−hours are allotted to prepare the aircraft for maintenance or to
prepare for this Service Bulletin.
4 man−hours are necessary to do this modification.
The labor required to do this Service Bulletin is at no cost if:
− the work is done during new aircraft warranty period, and
− the work is done at Bombardier Business Aviation Services (BBAS) or
Authorized Service Facilities (ASF), and
− this Service Bulletin is scheduled in less than 36 months from its release date
(Basic Issue).
G. Material − Cost and Availability
Kit 650K32−007 is necessary to do this modification. For material data, refer to
Paragraph 3.C.
MODEL CL−600−2B16
Basic Issue: Oct 30/2023 650−32−007
Page 3 of 10

### Page 5

KIT NO. PRICE
650K32−007
Please contact Bombardier Aviation
Parts Services, in Montreal, for delivery
lead times and confirmation of prices.
The parts listed in Paragraph 3.B. may be necessary to do this modification.
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
The kit and/or parts are available at no cost if:
− ordered during new aircraft warranty period, and
− a no−charge purchase order is sent to Bombardier Aviation in less than
36 months from this Service Bulletin release date (Basic Issue).
For those aircraft in new aircraft warranty at the time of Service Bulletin distribution,
Smart Parts does not for the kit at any time.
For those aircraft out of new aircraft warranty at the time of Service Bulletin
distribution, Smart Parts pays for the kit for up to 36 months from Service Bulletin
distribution date (Basic Issue).
H. Tooling
The equipment and tools listed below are necessary to do this modification:
GSE REFERENCE NO. PART NO. DESCRIPTION
Commercially Available − Digital Voltmeter
Commercially Available − Screwdriver Extension, Rigid 2 in(50.8 mm)
Commercially Available − Screwdriver Bit, Cut to 1 7/8 in(47.6 mm)
Commercially Available − Screwdriver Bit Holder
Commercially Available − Screwdriver, Torque 5 to 6 lbf in (0.56to 0.68 Nm)
NOTES: 1. Refer to the CL−650 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 CL−650, for
acceptable GSE equivalents.
MODEL CL−600−2B16
Basic Issue: Oct 30/2023 650−32−007
Page 4 of 10

### Page 6

3. This list is provided for quick reference. In case of discrepancy
between this list and the tools called in the SPM, WM, Chapter 20,
then the tools called in the SPM−WM prevail. Other approved
alternative tools are acceptable and can also be used.
4. Do not use other tool in lieu of the screwdriver listed in table.
I. Weight and Balance
No change.
J. Electrical Load Data
No change.
K. References
− TCCA Airworthiness Directive, (pending).
− Bombardier Aviation, Restriction and/or Special Instruction (RSI), C−4306,
Rev. −−1.
− Bombardier Aviation, Kit Drawing, K600−90101, Rev. −−.
− CL−650 Time Limits/Maintenance Checks (TLMC), RS−CL650−030.
− Bombardier Aviation, Standard Practice Manual (SPM), Chapters 20 and 51.
− CL−650 Aircraft Maintenance Manual (AMM), Chapters 6, 24, 32, 52 and 53.
− CL−650 Aircraft Illustrated Parts Catalog (AIPC), Chapters 27 and 32.
− CL−650 Aircraft Maintenance Manual (AMM), incorporating the intent of
TR 32−10, TR 32−11 and TR 32−12.
− CL−650 Aircraft Illustrated Parts Catalog (AIPC), incorporating the intent of
TR 27−3 and TR 32−1.
L. Other Publications Affected
− CL−650 Aircraft Maintenance Manual (AMM) Revision 30, Chapter 32.
− CL−650 Aircraft Illustrated Parts Catalog (AIPC) Revision 30, Chapter 32.
M. Equivalent Service Bulletins
− For the Challenger 600 aircraft, use the SB 600−0782.
− For the Challenger 601 aircraft, use the SB 601−1114.
− For the Challenger 604 aircraft, use the SB 604−32−033.
− For the Challenger 605 aircraft, use the SB 605−32−010.
MODEL CL−600−2B16
Basic Issue: Oct 30/2023 650−32−007
Page 5 of 10

### Page 7

2. ACCOMPLISHMENT INSTRUCTIONS
NOTES: 1. All TASKs given in the procedures that follow are from the CL−650 Aircraft
Maintenance Manual unless otherwise specified.
2. All references made to zones, access panels and/or doors, are from the
CL−650 Aircraft Maintenance Manual, Chapter 6.
A. Aircraft Setup
(1) Obey all the electrical/electronic safety precautions. Refer to
AMM 24−00−00−910−801.
(2) Remove the flight−controls access panels (131AL/132AR). Refer to
AMM 52−44−20−000−801.
(3) Remove the flight compartment floor−panel (221CLF). Refer to
AMM 53−01−01−000−801.
B. Modification
NOTES: 1. 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 get an approved disposition to complete this Service
Bulletin. Standard SRPSA fees may apply. Refer to the Services
section of the Bombardier customer portal for the latest prices, rates
and fees.
2. It may be required to remove the passenger system oxygen cylinder
in accordance with applicable SMM procedures. This may provide
better access to the rudder potentiometer universal coupling location.
(1) Get access to potentiometer universal coupling, Part No. T16−6 on rudder feel
unit assembly.
(2) Visually inspect the coupling, Part No. T16−6, for damage and pay particular
attention to any cracking of the threaded holes.
(3) If coupling is not replaced, do as follows:
NOTE: During Steps (a) and (b) do not move rudder pedals or rotate rudder
potentiometer until the new setscrews are tightened per Step (b).
(a) Remove and discard the two upper setscrews connecting the coupling to
the rudder pedal pivot per AMM 32−51−04−000−801 following the relevant
steps in accordance with TR 32−10 or AMM incorporating the intent of
TR 32−10.
(b) Install the new self−locking setscrews (11) per AMM 32−51−04−400−801
in accordance with TR 32−10 or AMM incorporating the intent of TR 32−10
Section G.(1)., Steps (a) to (e) and (g), (h), and G.(2)
(Post SB 650−32−007) (using new self−locking setscrews, anaerobic
retaining compound and specified torque).
(c) Rig the potentiometer per AMM 32−51−04−820−801 in accordance with
TR 32−11 or AMM incorporating the intent of TR 32−11,
Post SB 650−32−007.
MODEL CL−600−2B16
Basic Issue: Oct 30/2023 650−32−007
Page 6 of 10

### Page 8

(4) If coupling is replaced, do as follows:
(a) Remove the potentiometer and coupling per AMM 32−51−04−000−801 in
accordance with TR 32−10 or AMM incorporating the intent of TR 32−10,
per the applicable procedure (Pre SB 650−32−007).
(b) Install the coupling and potentiometer per AMM 32−51−04−400−801 in
accordance with TR 32−10 or AMM incorporating the intent of TR 32−10,
following task instructions related to Post SB 650−32−007 (using new
self−locking setscrews, anaerobic retaining compound and specified
torque).
(c) Rig the potentiometer per AMM 32−51−04−820−801 in accordance with
TR 32−11 or AMM incorporating the intent of TR 32−11, following task
instructions related to Post SB 650−32−007.
(5) If required, replace the potentiometer per AMM 32−51−04−400−801 and rig the
potentiometer per AMM 32−51−04−820−801, respectively in accordance with
TR 32−10 and TR 32−11 or AMM incorporating the intent of TR 32−10 and
TR 32−11, following task instructions related to Post SB 650−32−007.
C. Testing
(1) Do the operational test of the nosewheel steering system. Refer to
AMM 32−51−00−710−801.
D. Close−out
(1) Remove all tools, equipment and unwanted materials from the aircraft.
NOTE: Make sure to remove the rigging pin that was installed in the rudder
pedal system forward quadrant.
(2) If previously removed, re−install the passenger system oxygen bottle in
accordance with the SMM requirements.
(3) Install the flight−controls access panels (131AL/132AR). Refer to
AMM 52−44−20−400−801.
(4) Install the flight compartment floor−panel (221CLF). Refer to
AMM 53−01−01−400−801.
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), comment(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
MODEL CL−600−2B16
Basic Issue: Oct 30/2023 650−32−007
Page 7 of 10

### Page 9

3. MATERIAL INFORMATION
A. Kit
Kit 650K32−007 is necessary to do this Service Bulletin and contains the part that
follows:
NEW PART NO. QTY ITEM USED PARTNO. INSTRUCTIONS- DISPOSITION
B0201102−2−220 8 Self−lockingSetscrew MS18063−2 Discard
NOTES: 1. In case of discrepancy between this list and the Service Bulletin Kit
Parts List contained in the respective kit, then the later list prevails.
2. The actual quantity for some of the hardware contained in the kit can
be greater than the amount shown in the table as these items are
supplied in prepackaged quantities.
3. The self−locking setscrew can be identified by its yellow locking
patch.
B. Part
The parts that follow may be necessary to do this Service Bulletin and are available
from Bombardier Aviation Parts Services, Montreal:
NEW PART NO. QTY ITEM USED PARTNO. INSTRUCTIONS- DISPOSITION
7149−3
or
8978−3
1 Potentiometer − −
T16−6 1 UniversalCoupling − −
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 consumables.
MODEL CL−600−2B16
Basic Issue: Oct 30/2023 650−32−007
Page 8 of 10

### Page 10

DESCRIPTION PARTNO./NAME SPECIFICATION QUANTITY SUPPLIER(SEENOTE)
Anaerobic
Retaining
Compound
Loctite 243 − AsNecessary Code: A
Lockwire MS20995C32 − AsNecessary Code: A
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
Commercially Available
D. Publications
No publications required.
MODEL CL−600−2B16
Basic Issue: Oct 30/2023 650−32−007
Page 9 of 10

### Page 11

SB650−32−007_001
FS209.70
7149−3 OR 8978−3
(POTENTIOMETER)
7149−3 OR 8978−3
(POTENTIOMETER)
T16−6
(COUPLING)
T16−6
(COUPLING)
601−86105−1
(ADAPTOR)
601−86105−1
(ADAPTOR)
B0201102−2−220
(SETSCREW)
(QTY 4)
MODEL CL−600−2B16
Replacement of Universal Coupling (T16−6) Setscrews
Figure 1
Basic Issue: Oct 30/2023 650−32−007
Page 10 of 10

### Page 12

650−32−007 Basic Oct 30/2023
MODIFICATION – NOSEWHEEL STEERING –
REPLACEMENT OF POTENTIOMETER UNIVERSAL COUPLING (T16−6)
SETSCREWS
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 13

SERVICE BULLETIN INCORPORATION SHEET − "650−32−007"
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.
650−32−007 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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