SB 601R---27---159

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Jun 15/2011

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: 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.
SERVICE BULLETIN 601R---27---159

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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

Tolerance Inspections (DTIs).
SERVICE BULLETIN 601R---27---159

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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) Job Set---Up 8.0

(2) Procedure N/A

(3) Test 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.
SERVICE BULLETIN 601R---27---159

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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).

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

514-855-2999 or 1-866-538-1247.

H. Tooling --- 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).

To 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.
SERVICE BULLETIN 601R---27---159

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2. ACCOMPLISHMENT INSTRUCTIONS

A. Job Set---Up

Reference Information

REFERENCE DESIGNATION

AMM 24---00---00---910---801 Electrical/Electronic Safety Precautions

AMM 27---40---00---710---802 Operational Test of the Horizontal Stabilizer Trim

System

AMM 27---41---00---740---801 Functional Check (Ground Maintenance Test) of

the HSTCU

AMM 27---42---01---000---801 Removal of the HSTA

AMM 27---42---01---400---801 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

CBP---2 B8 STAB CH1 HSTA 222

CBP---2 F5 STAB CH1 HSTCU 222

CBP---3 A5 STAB CH2 HSTA 221

CBP---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).
SERVICE BULLETIN 601R---27---159

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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---2 B8 STAB CH1 HSTA 222

CBP---2 F5 STAB CH1 HSTCU 222

CBP---3 A5 STAB CH2 HSTA 221

CBP---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.”
SERVICE BULLETIN 601R---27---159

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Horizontal Stabilizer Trim---Actuator (HSTA)

Figure 1

MONITOR

CONTROL UNIT

rsb601r27158_001.dg, 10 May 2011

HSTA

(REF)
SERVICE BULLETIN 601R---27---159

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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 Tools 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
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 

Instructions to do the Service Bulletin 

were accurate. 

Comments:



Illustration(s), figure(s), picture(s) and/or 

kit drawing(s) were helpful to carry out 

instructions.

Comments:



If a parts kit was required, did the kit 

contents received agree with the 

contents listed in the bulletin? 

Comments:



Aircraft hands-on work was 

accomplished in estimated time. 

 Comments:



Overall, I was satisfied with this Service 

Bulletin.

 Comments: 



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