SB 601R---27---139

Page 1 of 1

May 28/2012

SERVICE BULLETIN

REVISION TRANSMITTAL SHEET

CL ---600 ---2B19 Canadair Regional Jet (CRJ) Aircraft

SERVICE BULLETIN 601R ---27 ---139

SUBJECT: Flight Controls --- Elevator Control System --- Replacement of Pitch-Feel

Simulators (PFS) P/N 601R92300 ---3 and P/N 601R92300 ---5 by PFS P/N

601R92300 ---7

This page transmits:

Revision A of Service Bulletin 601R --- 27 --- 139

pages 1 thru 11, dated May 28/2012

The changes in this revision have no effect on aircraft that have

incorporated a previous issue of this service bulletin.

Reason:

Revised Planning Information, paragraph 1., to:

Removed aircraft 8111 from the Aircraft Affected paragraph.

Instructions:

Discard the copy of Service Bulletin 601R --- 27 --- 139, dated Dec 22/2011. Replace with the

copy attached.

KEEP GOODRICH SERVICE BULLETIN 1910---27---L1910---5 AND REPLACE GOODRICH

SERVICE BULLETIN 1910---27---01, DATED DEC 08/11 WITH COPY DATED APR 10/12.

Service Bulletin History:

Initial issue, dated Dec 22/2011.

1
S.B. 601R---27---139

Page 1 of 11

Dec 22/2011

Revision A, May 28/2012

SERVICE BULLETIN

THIS SERVICE BULLETIN IS BEING SENT TO EACH AFFECTED OPERATOR. IF THE OPERATOR

IF THE OPERATOR HAS SOLD AIRCRAFT OR TRANSFERRED AFFECTED SPARES WITHIN THE

LAST SIX MONTHS, THIS SERVICE BULLETIN SHOULD BE FORWARDED TO THE NEW OWNER

UNLESS CONFIRMATION HAS BEEN RECEIVED THAT BOMBARDIER REGIONAL AIRCRAFT

HAS LEASED AIRCRAFT, THIS SERVICE BULLETIN SHOULD BE FORWARDED TO THE LESSEE.

DIVISION HAS INCLUDED THE NEW OPERATOR ON THE DISTRIBUTION LIST.

Technical

Publications

ATA SYSTEM: 27 ---31 NUMBER: 601R ---27 ---139

SUBJECT: Flight Controls --- Elevator Control System --- Replacement of Pitch-Feel

Simulators (PFS) P/N 601R92300 ---3 and P/N 601R92300 ---5 by PFS P/N

601R92300 ---7

1. PLANNING INFORMATION

A. Effectivity

(1) Aircraft Affected:

Service Bulletin: CL ---600---2B19 Canadair Regional Jet (CRJ) Aircraft with

the component part numbers/serial numbers that follow

installed:

Part Number: 601R92300---3 (Vendor P/N TY1910---50A), and

601R92300---5 (Vendor P/N TY1910---51A).

Installed on

Aircraft with

Serial

Numbers:

7003 thru 7067, 7069 thru 7990, 8000 thru

8110.

Spares:

Examine all spare parts. If a part with a part

number listed above is found, it is necessary

to incorporate Goodrich Service Bulletin

1910---27---L1910---5 and/or 1910---27---01.

All

CL ---600 ---2B19

If parts with the part 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

Goodrich Service Bulletin 1910---27---L1910---5

and/or 1910---27---01.
SERVICE BULLETIN 601R---27 ---139

S.B. 601R---27---139

Page 2 of 11

Dec 22/2011

Revision A, May 28/2012

Production: This change will be incorporated before delivery on aircraft

with serial number 8111 and subsequent serial numbers.

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 Bulletins. Before you do this service

bulletin, examine all STC, STA or equivalent action changes to make

sure you can complete this service bulletin.

B. Reason

(1) Condition

It is possible for some components installed in the Pitch-Feel Simulator (PFS)

units, P/N 601R92300---3 and P/N 601R92300---5, to have the conditions that

follow:

 a broken shear-pin assembly,

 a broken connector-rod eye-end,

 a disagreement between the quality of the bearing and the data of the

specifications, and

 a decrease in the primary break-out force over the life of the part.

(2) Evidence

Tests done on the lever assembly and the connector-rod eye-end have shown

that the lever shear-pin design does not obey the fatigue testing specifications

and that there is a decrease of primary break-out force. Also, some PFS units

were made with bearings that were incorrect for the function of the PFS.

(3) Objective/Benefit

This service bulletin gives the procedure to remove PFS units P/N

601R92300---3 and P/N 601R92300---5, and install PFS units P/N

601R92300---7. The durability of the shear pin in the lever assembly and the

eye end of the tie rod assembly agree with the data of the specification. The

primary breakout force of the PFS unit is increased to make sure that the feel

force is kept during operation.
SERVICE BULLETIN 601R---27 ---139

S.B. 601R---27---139

Page 3 of 11

Dec 22/2011

Revision A, May 28/2012

C. Description

Circuit breakers are opened. Warning placards are installed on the flight controls.

The left and the right forward access panels are removed from the vertical stabilizer.

The pitch-feel simulator units are removed. Goodrich Service Bulletins

1910---27---L1910---5 and/or 1910---27---01 are done.

The pitch-feel simulators are installed. The control column feel-force and centering

check is done. The left and right forward access panels are installed on the vertical

stabilizer. The circuit breakers are closed. The warning placards are removed from

the flight controls.

D. Compliance

Recommended service bulletin. For aircraft that have 20,000 flight hours or less,

Bombardier Aerospace recommends that this service bulletin be done at no more

than 7000 flight hours or four years, whichever comes first, from the release date on

this service bulletin, unless otherwise directed by the airworthiness authority of the

operator.

For aircraft that have more than 20,000 flight hours, Bombardier Aerospace

recommends that this service bulletin be done at no more than 18 months from the

release date on this service bulletin, unless otherwise directed by the airworthiness

authority of the operator.

NOTE: It is not necessary to do Service Bulletin 601R---27---144, Flight Controls

--- Pitch Feel Simulator --- Functional Test of the Pilot Input Lever of the

Pitch-Feel Simulator (PFS) P/N 601R92300---3 and P/N 601R92300---5

when this service bulletin is done.

This service bulletin affects Airworthiness Limitations (AWLs) and/or Damage

Tolerance Inspections (DTIs). Reference applicable Pre/Post Modsum

TC601R18004 and/or service bulletin 601R---27---139 in the Maintenance

Requirements Manual (MRM).

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 estimates for direct labor done by an experienced

crew on an aircraft prepared for maintenance.

These estimates do not include the time necessary for:

Administrative functions such as planning, liaising, familiarization, and report writing.

Non-productive elapsed time such as rest time, having meals, and crew shift changes.
SERVICE BULLETIN 601R---27 ---139

S.B. 601R---27---139

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Dec 22/2011

Revision A, May 28/2012

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. Contact the Fleet Services Team through the

CRC at 514---855---8500 or email at thd.crj@aero.bombardier.com.

It will take an estimated 8.0 man-hours to complete this service bulletin. The

breakdown of the man-hours is shown in the table that follows:

TASK MAN ---HOURS

(1) Job Set ---Up 1.5

(2) Procedure 2.0

(3) Test 3.0

(4) Close---Out 1.5

NOTE: This estimate do not include the man-hours necessary to do Goodrich

Service Bulletins 1910---27---L1910---5 and 1910---27---01.

G. Material --- Price and Availability

(1) Refer to Goodrich Service Bulletin 1910---27---L1910---5 and 1910---27---01 for

terms and conditions to do the modification of PFS units P/N

601R92300---3/ ---5 to the new PFS units P/N 601R92300---7.

(2) Refer to paragraph 3.C. for a list of required consumables for incorporation of

this service bulletin.
SERVICE BULLETIN 601R---27 ---139

S.B. 601R---27---139

Page 5 of 11

Dec 22/2011

Revision A, May 28/2012

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

None.

I. Weight and Balance

Not Affected.

J. Electrical Load Data

Not Affected.

K. References

Modsum TC601R18004, Revision C ---1.

Restriction and/or Special Instruction (RSI) C ---A291 Revision C.

Goodrich Service Bulletin 1910---27---01, Revision 1, dated Apr 10/12.

Goodrich Service Bulletin 1910---27---L1910---5, dated Dec 08/2011.

Aircraft Maintenance Manual (AMM).

For Bombardier Aerospace reference only: PCA 05038.

L. Other Publications Affected

Aircraft Illustrated Parts Catalog (AIPC).

M. Relationship Chart

None.
SERVICE BULLETIN 601R---27 ---139

S.B. 601R---27---139

Page 6 of 11

Dec 22/2011

Revision A, May 28/2012

2. ACCOMPLISHMENT INSTRUCTIONS

A. Job Set ---Up

Reference Information Table

TASK TITLE

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

AMM 27---31---00---220---807 Control Column Feel Force and Centering Check

AMM 27---31---20---000---801 Removal of the Pitch Feel Simulator Unit

AMM 27---31---20---400---801 Installation of the Pitch Feel Simulator Unit

AMM 55---32---05---000---801 Removal of the Forward Access Panels

AMM 55---32---05---400---801 Installation of the Forward Access Panels

WARNING: OBEY ALL THE SAFETY PRECAUTIONS WHEN YOU DO

MAINTENANCE ON OR NEAR ELECTRICAL/ELECTRONIC

EQUIPMENT. IF YOU DO NOT OBEY THE SAFETY PRECAUTIONS,

INJURIES TO PERSONS AND/OR DAMAGE TO THE EQUIPMENT CAN

OCCUR.

(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 ---1 F5 PITCH FEEL CH 1 221

CBP ---2 B8 STAB CH 1 HSTA 222

CBP ---2 F5 STAB CH 1 HSTCU 222

CBP ---2 F14 PITCH FEEL CH 2 222

CBP ---3 A5 STAB CH 2 HSTA 221

CBP ---4 A1 STAB CH 2 HSTCU 222
SERVICE BULLETIN 601R---27 ---139

S.B. 601R---27---139

Page 7 of 11

Dec 22/2011

Revision A, May 28/2012

WARNING: PUT THE SAFETY DEVICES, WARNING SIGNS, AND WARNING

PLACARDS IN POSITION BEFORE YOU START A PROCEDURE ON OR

NEAR:

---FLIGHT CONTROLS

---FLIGHT CONTROL SURFACES

---COMPONENTS THAT MOVE.

MAKE SURE THAT THERE ARE NO PERSONS OR EQUIPMENT ON OR

NEAR THE FLIGHT CONTROL SURFACES. ACCIDENTAL MOVEMENT

OF THE FLIGHT CONTROLS CAN CAUSE INJURIES TO PERSONS

AND/OR DAMAGE TO EQUIPMENT.

(3) Install the applicable warning placards on the pilot’s and copilot’s control

columns and the STAB TRIM/MACH TRIM panel.

(4) Remove the access panels that follow (Refer to AMM 55---32---05---000---801):

ACCESS PANEL DESCRIPTION

326EL Left Forward Access Panel

326ER Right Forward Access Panel
SERVICE BULLETIN 601R---27 ---139

S.B. 601R---27---139

Page 8 of 11

Dec 22/2011

Revision A, May 28/2012

B. Procedure

Refer to Figure 1.

(1) Remove the two PFS units (1) (Refer to AMM 27---31---20---000---801).

NOTE: It is permitted to upgrade PFS units 601R92300---3/ ---5 to PFS unit

601R92300---7 with Goodrich Service Bulletins 1910---27---L1910---5.

and 1910---27---01.

(2) Install the two new PFS units (1) (Refer to AMM 27---31---20---400---801).

C. Close Out

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

(2) Remove the warning placards from the pilot’s and copilot’s control columns

and the STAB TRIM/MACH TRIM panel.

(3) Remove the tags and close the circuit breakers that follow:

CB PANEL CB NO. NAME ZONE

CBP ---1 F5 PITCH FEEL CH 1 221

CBP ---2 B8 STAB CH 1 HSTA 222

CBP ---2 F5 STAB CH 1 HSTCU 222

CBP ---2 F14 PITCH FEEL CH 2 222

CBP ---3 A5 STAB CH 2 HSTA 221

CBP ---4 A1 STAB CH 2 HSTCU 222

(4) Do the control column feel-force and centering check

(Refer to AMM 27---31---00---220---807).

(5) Install the access panels that follow (Refer to AMM 55---32---05---400---801):

ACCESS PANEL DESCRIPTION

326EL Left Forward Access Panel

326ER Right Forward Access Panel
SERVICE BULLETIN 601R---27 ---139

S.B. 601R---27---139

Page 9 of 11

Dec 22/2011

Revision A, May 28/2012

(6) When this service bulletin is completed, make this entry in the applicable

logbook(s): “Service Bulletin 601R---27---139, Revision A, Flight Controls ---

Elevator Control System --- Replacement of Pitch-Feel Simulators (PFS) P/N

601R92300---3 and P/N 601R92300---5 by PFS P/N 601R92300---7,

incorporated.”
SERVICE BULLETIN 601R---27 ---139

S.B. 601R---27---139

Page 10 of 11

Dec 22/2011

Revision A, May 28/2012

Pitch ---Feel Simulator Unit

Figure 1

rsb601r27139_001.dg,mgr, 18/11/11

A

A

1. Pitch Feel Simulator

601R92300--3 Pre--Mod,

601R92300--5 Pre--Mod,

601R92300--7 Post--Mod.

LEGEND

1
SERVICE BULLETIN 601R---27 ---139

S.B. 601R---27---139

Page 11 of 11

Dec 22/2011

Revision A, May 28/2012

3. MATERIAL INFORMATION

A. Kit Information

None.

B. Consumables Required

For a complete list of consumables, refer to the different tasks and the Goodrich

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

Goodrich service bulletin given as references in this service bulletin.

D. Disposition of Parts

Pre ---SB

Part Number Name Qty DC Post ---SB

Part Number

601R92300---3

(TY1910---50A)

OR

Pitch-Feel

Simulator Unit 2 RTN 601R92300---7(TY1910---54A)

601R92300---5

(TY1910---51A)

Pitch-Feel

Simulator Unit 2 RTN 601R92300---7(TY1910---54A)

Disposition code (DC):

RTN Rotable Pool: Refer to Goodrich Service Bulletins 1910---27---L1910---5

and 1910---27---01.

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-27-139 ISSUE: A

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