# Bombardier Service Bulletin 601R-27-159

Copy: No revision named ("U.S. DOT/FAA - SB 601R-27-159"), 9 pages: PDF https://openairdocs.org/files/sha256/5e/81/5e81ef65eb2c384db32a9ee62e398705b4981b555ea9f413761654250bfefef1; text https://openairdocs.org/service-documents/bombardier/601r-27-159/file/5e81ef65eb2c.md. Rights: © Bombardier Inc. Filed by the FAA in regulations.gov docket FAA-2013-0687; AD 2014-04-08 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: 601R-27-159
- Page: https://openairdocs.org/service-documents/bombardier/601r-27-159

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

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

- [AD 2014-04-08](https://openairdocs.org/ad/2014-04-08.md), effective Apr 7, 2014: No revision named

Also cited in [1 proposed AD](https://openairdocs.org/service-documents/bombardier/601r-27-159/proposed.md).

## Text (9 pages)

Rights: © Bombardier Inc. Filed by the FAA in regulations.gov docket FAA-2013-0687; AD 2014-04-08 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

SB 601R- - - 27- - - 159
P a g e1o f8
Jun 15/2011
SERVICE BULLETIN
T echnical
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: 27- - -42 NUMBER: 601R - - -27- - -159
SUBJECT : Flight Controls - - - Horizontal Stabilizer Trim-Actuating System - - - Rework of
Horizontal Stabilizer Trim-Actuator (HSTA) P/N 601R92305 - - -5 (P/N
8396 - - -4)
1. PLANNING INFORMATION
A. Effectivity
Service Bulletin: CL- - - 600- - - 2B19 aircraft with the following components
installed:
Part number: 601R92305- - - 5 (8396- - - 4)
Part serial
numbers:
287, 724, 813, 841, 998, 1031, 1035, 1049,
1053, 1067, 1068, 1136, 1252, 1268, 1303,
1319, 1338, 1354, 1374, 1378, 1445,
1470, 1498, 1513, 1546, 1632, 1736, 1766,
1846, 1849, 2002 thru 2009, 2011, 2013 thru
2016, 2019, 2020, and 2022
Installed at time
of delivery on
aircraft with
serial numbers:
7003 thru 7067 and 7069 thru 8107
Spares:
Examine all spare parts. If a part with a serial
number listed above is found, it is necessary
to incorporate Sagem service bulletin
8396- - - 27- - - 007.

### Page 2

SERVICE BULLETIN 601R- - -27- - -159
SB 601R- - - 27- - - 159
P a g e2o f8
Jun 15/2011
All
CL- - - 600- - - 2B19
If parts with the serial numbers listed above
are installed, but were not identified at the
time of aircraft delivery, on the same or on a
different aircraft model, it is necessary to
incorporate Sagem service bulletin
8396- - - 27- - - 007.
Production: There is no production effectivity.
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.
B. Reason
(5) Condition
In the Horizontal Stabilizer Trim-Actuator (HSTA), it is possible that bearing
sleeves were made using an incorrect quenching process and/or primary
gears have burr marks. These conditions can cause the HSTA to operate
incorrectly.
(6) Evidence
These conditions were found in production at the supplier facility .
(7) Objective/Benefit
This service bulletin gives the instructions to change some internal
components in the HSTA. This will prevent incorrect operation of the HSTA.
C. Description
Circuit breakers are opened. The HSTA is removed from the aircraft. The HSTA is
reworked with Sagem Service Bulletin 8396- - - 27- - - 007.
The HSTA is installed. Circuit breakers are closed. An operational test of the
horizontal stabilizer trim-system is done. A functional test of the HSTCU is done.
D. Compliance
Recommended Service Bulletin. Bombardier recommends that this service bulletin
be done no more than 1500 flight hours from the release date on this service
bulletin, or before March 20/2012, whichever comes first, unless otherwise directed
by the airworthiness authority of the operator.
This service bulletin does not affect Airworthiness Limitations (AWLs) or Damage
T olerance Inspections (DTIs).

### Page 3

SERVICE BULLETIN 601R- - -27- - -159
SB 601R- - - 27- - - 159
P a g e3o f8
Jun 15/2011
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.
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 18.5 man- - -hours to complete this service bulletin. The
man- - -hours are divided as shown in the table that follows:
TASK MAN- - -HOURS
( 1 ) J o b S e t --- U p 8.0
(2) Procedure N/A
(3) T est 2.5
(4) Job Close- - -Out 8.0
NOTE: This estimate does not include the man- - -hours necessary to do Sagem
Service Bulletin 8396- - - 27- - - 007.

### Page 4

SERVICE BULLETIN 601R- - -27- - -159
SB 601R- - - 27- - - 159
P a g e4o f8
Jun 15/2011
G. Material - - - Price and Availability
Refer to Sagem Service Bulletin 8396- - - 27- - - 007.
Refer to paragraph 3.B. for a list of consumables for this service bulletin.
For Business/Corporate Operators
All Business/Corporate operators (i.e. operators who do not have a commercial
airline operation) refer to SB 800-00-004 for commercial policy coverage and
logistics/planning arrangements (refer to www.cic.bombardier .com/technical
library/service bulletins/challenger/850/SB 800-00-004).
T o place an order for parts or kits, please call Bombardier Parts Logistics at
514-855-2999 or 1-866-538-1247.
H. T ooling - - - 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.
For Business/Corporate Operators
All Business/Corporate operators (i.e. operators who do not have a commercial
airline operation) refer to SB 800- - -00- - -004 for commercial policy coverage and
logistics/planning arrangements (refer to www.cic.bombardier .com/technical
library/service bulletins/challenger/850/SB 800- - - 00- - - 004).
T o order parts or kits, please call Bombardier Parts Logistics at 514-855-2999 or
1-866-538-1247.
I. Weight and Balance
Not changed.
J. Electrical Load Data
Not changed.
K. References
Restriction and/or Special Instruction (RSI) C- - -A273, Revision A.
Sagem Service Bulletin 8396- - - 27- - - 007, dated MAY 11, 2011.
Aircraft Maintenance Manual.
For Bombardier reference only: PCA 6501.
L. Other Publications Affected
Illustrated Parts Catalog (IPC).
M. Relationship Chart
Not applicable.

### Page 5

SERVICE BULLETIN 601R- - -27- - -159
SB 601R- - - 27- - - 159
P a g e5o f8
Jun 15/2011
2. ACCOMPLISHMENT INSTRUCTIONS
A. Job Set - - -Up
Reference Information
REFERENCE DESIGNATION
A M M 2 4 --- 0 0 --- 0 0 --- 9 1 0 --- 8 0 1 Electrical/Electronic Safety Precautions
A M M 2 7 --- 4 0 --- 0 0 --- 7 1 0 --- 8 0 2Operational T est of the Horizontal Stabilizer Trim
System
A M M 2 7 --- 4 1 --- 0 0 --- 7 4 0 --- 8 0 1Functional Check (Ground Maintenance T est) of
the HSTCU
A M M 2 7 --- 4 2 --- 0 1 --- 0 0 0 --- 8 0 1 Removal of the HSTA
A M M 2 7 --- 4 2 --- 0 1 --- 4 0 0 --- 8 0 1 Installation of the HSTA
(1) Obey all the electrical/electronic safety precautions
(Refer to AMM 24- - - 00- - - 00- - - 910- - - 801).
(2) Open, safety, and tag the circuit breakers that follow:
CB PANEL CB NO. NAME ZONE
C B P --- 2 B8 STAB CH1 HSTA 222
C B P --- 2 F5 STAB CH1 HSTCU 222
C B P --- 3 A5 STAB CH2 HSTA 221
C B P --- 4 A1 STAB CH2 HSTCU 222
(3) Install the warning placards on the control column and the STAB TRIM/MACH
TRIM control panel of the pilot and copilot.
B. Procedure
Refer to Figure 1.
(1) Remove the HSTA (Refer to AMM 27- - - 42- - - 01- - - 000- - - 801).
NOTE: Refer to Sagem Service Bulletin 8396- - - 27- - - 007 to modify the HSTA.
(2) Install the modified HSTA (Refer to AMM 27- - - 42- - - 01- - - 400- - - 801).

### Page 6

SERVICE BULLETIN 601R- - -27- - -159
SB 601R- - - 27- - - 159
P a g e6o f8
Jun 15/2011
C . J o b C l o s e --- O u t
(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
C B P --- 2 B8 STAB CH1 HSTA 222
C B P --- 2 F5 STAB CH1 HSTCU 222
C B P --- 3 A5 STAB CH2 HSTA 221
C B P --- 4 A1 STAB CH2 HSTCU 222
(3) Remove the warning placards from the control column and the STAB
TRIM/MACH TRIM control panel of the pilot and copilot.
(4) Do the operational test of the horizontal stabilizer trim system
(Refer to AMM 27- - - 40- - - 00- - - 710- - - 802).
(5) Do the functional test of the HSTCU (Refer to AMM 27- - - 41- - - 00- - - 740- - - 801).
(6) When this service bulletin is completed, make this entry in the applicable
logbook(s): “Service Bulletin 601R- - -27- - -159, Flight Controls - - - Horizontal
Stabilizer Trim-Actuating System - - - Rework of a Horizontal Stabilizer
Trim-Actuator (HSTA), incorporated.”

### Page 7

SERVICE BULLETIN 601R- - -27- - -159
SB 601R- - - 27- - - 159
P a g e7o f8
Jun 15/2011
Horizontal Stabilizer Trim - - -Actuator (HSTA)
F i g u r e1
MONITOR
CONTROL UNIT
rsb601r27158_001.dg, 10 May 2011
HSTA
(REF)

### Page 8

SERVICE BULLETIN 601R- - -27- - -159
SB 601R- - - 27- - - 159
P a g e8o f8
Jun 15/2011
3. MATERIAL INFORMATION
A. Kit Information
None.
B. Consumable Information
For a list of consumables, refer to the different tasks and the Sagem service bulletin
given as references in this service bulletin.
C. Special T ools and Equipment
For a list of special tools and equipment, refer to the different tasks and the Sagem
service bulletin 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
601R92305- - - 5
(8396- - - 4) HSTA 1 RWI 601R92305- - - 5(8396- - - 4) HSTA
Disposition code (DC):
RWI: Refer to Sagem Service Bulletin 8396- - -27- - -007 for instructions.
1

### Page 9

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-27-159 ISSUE: NC
 STRONGLY DISAGREE NEUTRAL AGREE STRONGLY 
 DISAGREE AGREE 
/g120 Instructions to do the Service Bulletin 
were accurate. 
Comments:
/g137/g137 /g137 /g137 /g137
/g120 Illustration(s), figure(s), picture(s) and/or 
kit drawing(s) were helpful to carry out 
instructions.
Comments:
/g137/g137 /g137 /g137 /g137
/g120 If a parts kit was required, did the kit 
contents received agree with the 
contents listed in the bulletin? 
Comments:
/g137/g137 /g137 /g137 /g137
/g120 Aircraft hands-on work was 
accomplished in estimated time. 
      Comments:
/g137/g137 /g137 /g137 /g137
/g120 Overall, I was satisfied with this Service 
Bulletin.
 Comments: 
/g137/g137 /g137 /g137 /g137
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

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