SB 601R---71---034

Page 1 of 1

Aug 1/2014

SERVICE BULLETIN

REVISION TRANSMITTAL SHEET

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

SERVICE BULLETIN 601R ---71 ---034

SUBJECT: Power Plant --- Cowling --- Installation of Additional Attaching Hardware on

the Engine Nose Access-Cowls

This page transmits:

Revision B of Service Bulletin 601R --- 71 --- 034, dated Aug 1/2014

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

this service bulletin incorporated.

Reason:

Revised Planning Information, paragraph 1., to:

Extend the range of aircraft in the Aircraft Affected section.

Add a note in the Compliance section.

Revised Accomplishment Instructions, paragraph 2., to:

Add steps and extend the effectivity range.

This revision also includes small editorial changes that do not have an effect on the technical

content.

Instructions:

Discard the copy of Service Bulletin 601R --- 71 --- 034, Revision A dated Apr 28/2014.

Replace with the copy attached.

Keep Short Brothers Service Bulletin CF34---NAC ---71---042, Revision A, dated February 18,

2014.

Service Bulletin History:

Initial issue, dated Mar 31/2014

Revision A, dated Apr 28/2014

1
SB 601R−71−034

Page 1 of 13

Mar 31/2014

Revision B, Aug 1/2014

SERVICE BULLETIN

Technical

Publications

THIS SERVICE BULLETIN IS SENT TO EACH OPERATOR. IF THE OPERATOR HAS LEASED AIRCRAFT,

TRANSFERRED SPARES IN THE LAST SIX MONTHS, SEND THIS SERVICE BULLETIN TO THE NEW

OWNER, UNLESS CONFIRMATION WAS RECEIVED THAT BOMBARDIER HAS INCLUDED THE NEW

OPERATOR ON THE DISTRIBUTION LIST.

SEND THIS SERVICE BULLETIN TO THE LESSEE. IF THE OPERATOR HAS SOLD AIRCRAFT OR

ATA SYSTEM: 71−10 NUMBER: 601R−71−034

SUBJECT: Power Plant − Cowling − Installation of Additional Attaching Hardware on

the Engine Nose Access-Cowls

1. PLANNING INFORMATION

A. Effectivity

(1) Aircraft Affected:

Service: CL−600−2B19 aircraft with serial numbers 7003 thru 7067,

7069 thru 7990, and 8000 thru 8999.

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 bulletins. Before you do this service

bulletin, examine all Supplemental Type Certificates (STCs), and

Supplemental Type Approvals (STAs) or equivalent action changes

to make sure you can complete this service bulletin.
SERVICE BULLETIN 601R−71−034

SB 601R−71−034

Page 2 of 13

Mar 31/2014

Revision B, Aug 1/2014

B. Reason

(1) Condition

If the camloc fasteners that attach the engine nose access-cowls are

incorrectly fastened, the nose access−cowls can disengage during flight.

(2) Evidence

Some operators reported that nose access-cowls have disengaged during

flight, caused by incorrectly fastened camloc fasteners.

(3) Objective/Benefit

This service bulletin gives the instruction to do Short Brothers Service Bulletin

CF34−NAC−71−042, which gives the procedure to install additional

fasteners on the nacelle access panels.

The installation of additional fasteners will prevent the nose access-cowls to

disengage during flight.

C. Description

PART A − Installation of Additional Attaching Hardware on the Left Nose

Access-Cowls

Circuit breakers are opened. Short Brothers Service Bulletin CF34−NAC−71−042,

Part A, is done. The circuit breakers are closed.

PART B − Installation of Additional Attaching Hardware on the Right Nose

Access-Cowls

Circuit breakers are opened. Short Brothers Service Bulletin CF34−NAC−71−042,

Part B, is done. The circuit breakers are closed.

D. Compliance

Recommended service bulletin.

Bombardier recommends that this service bulletin be done at no more than 6000

flight hours from the release date on this service bulletin unless otherwise directed

by the airworthiness authority of the operator.

NOTE: If it is not possible to complete all the instructions in this service bulletin

because of the configuration of the aircraft, speak with a representative

of Bombardier Customer Response Centre at phone number

514−855−8500 or send an e−mail at thd.crj@bombardier.com for

analysis and to get an approved disposition to complete this service

bulletin.

This service bulletin does not affect Airworthiness Limitations (AWLs) or Damage

Tolerance Inspections (DTIs).
SERVICE BULLETIN 601R−71−034

SB 601R−71−034

Page 3 of 13

Mar 31/2014

Revision B, Aug 1/2014

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.

−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 e-mail at

thd.crj@aero.bombardier.com.
SERVICE BULLETIN 601R−71−034

SB 601R−71−034

Page 4 of 13

Mar 31/2014

Revision B, Aug 1/2014

FOR PART A

It will take an estimated 0.5 man-hours to complete PART A of this service bulletin.

The man-hours are divided in the table that follows:

TASK MAN-HOURS

(1) Job Set-Up 0.25

(2) Procedure N/A

(3) Test N/A

(4) Job Close-Out 0.25

NOTE: These estimates do not include the man-hours necessary to do Short

Brothers Service Bulletin CF34−NAC−71−042.

FOR PART B

It will take an estimated 0.5 man-hours to complete PART B of this service bulletin.

The man-hours are divided in the table that follows:

TASK MAN-HOURS

(1) Job Set-Up 0.25

(2) Procedure N/A

(3) Test N/A

(4) Job Close-Out 0.25

NOTE: These estimates do not include the man-hours necessary to do Short

Brothers Service Bulletin CF34−NAC−71−042.
SERVICE BULLETIN 601R−71−034

SB 601R−71−034

Page 5 of 13

Mar 31/2014

Revision B, Aug 1/2014

G. Material − Price and Availability

Refer to Short Brothers Service Bulletin CF34−NAC−71−042.

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

Refer to paragraph 3.C and Short Brothers Service Bulletin CF34−NAC−71−042

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).

.

I. Weight and Balance

Refer to Short Brothers Service Bulletin CF34−NAC−71−042.

J. Electrical Load Data

Refer to Short Brothers Service Bulletin CF34−NAC−71−042.

K. References

Refer to the SB Introduction document for definition or explanation of service

bulletin content.

Restriction and/or Special Instruction (RSI) C−A285, Revision B

Short Brothers Service Bulletin CF34−NAC−71−042, Revision A, dated February

18, 2014

Aircraft Maintenance Manual (AMM)

For Bombardier reference only: PCA 6496

L. Other Publications Affected

Aircraft Illustrated Parts Catalog (AIPC)

M. Relationship Chart

Refer to Short Brothers Service Bulletin CF34−NAC−71−042.
SERVICE BULLETIN 601R−71−034

SB 601R−71−034

Page 6 of 13

Mar 31/2014

Revision B, Aug 1/2014

2. ACCOMPLISHMENT INSTRUCTIONS

PART A − Installation of Additional Attaching Hardware on the Left Nose Access-Cowls

A. Job Set-Up

(1) Open, safety, and tag the circuit breakers that follow:

For Aircraft 7003 thru 7067 and 7069 thru 7890

CB PANEL CB NO. NAME ZONE

CBP−1 M2 ENG IGN A 221

CBP−1 M3 ENG IGN B 221

CBP−1 M5 ENG START L 221

CBP−3 B7 ENG IGN A 221

CBP−4 B5 THRUST REV AUTO STOW 1 222

CBP−4 B7 THRUST REV 1 222

CBP−5 B1 ENG IGN B 311

For Aircraft 7891 thru 7990 and 8000 thru 8999

CB PANEL CB NO. NAME ZONE

CBP−1 M3 ENG IGN B 221

CBP−1 M5 ENG START L 221

CBP−3 B7 ENG IGN A 221

CBP−4 B5 THRUST REV AUTO STOW 1 222

CBP−4 B7 THRUST REV 1 222

CBP−4 C6 ENG IGN A 222

CBP−5 B1 ENG IGN B 311
SERVICE BULLETIN 601R−71−034

SB 601R−71−034

Page 7 of 13

Mar 31/2014

Revision B, Aug 1/2014

B. Procedure

Refer to Figure 1.

(1) Do Short Brothers Service Bulletin CF34−NAC−71−042, Part A.

(2) If it is not possible to complete all the instructions in this service bulletin

because of the configuration of the aircraft, speak with a representative of

Bombardier Customer Response Centre at phone number 514−855−8500 or

send an e−mail at thd.crj@bombardier.com for analysis and to get an

approved disposition to complete this service bulletin.

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:

For Aircraft 7003 thru 7067 and 7069 thru 7890

CB PANEL CB NO. NAME ZONE

CBP−1 M2 ENG IGN A 221

CBP−1 M3 ENG IGN B 221

CBP−1 M5 ENG START L 221

CBP−3 B7 ENG IGN A 221

CBP−4 B5 THRUST REV AUTO STOW 1 222

CBP−4 B7 THRUST REV 1 222

CBP−5 B1 ENG IGN B 311
SERVICE BULLETIN 601R−71−034

SB 601R−71−034

Page 8 of 13

Mar 31/2014

Revision B, Aug 1/2014

For Aircraft 7891 thru 7990 and 8000 thru 8999

CB PANEL CB NO. NAME ZONE

CBP−1 M3 ENG IGN B 221

CBP−1 M5 ENG START L 221

CBP−3 B7 ENG IGN A 221

CBP−4 B5 THRUST REV AUTO STOW 1 222

CBP−4 B7 THRUST REV 1 222

CBP−4 C6 ENG IGN A 222

CBP−5 B1 ENG IGN B 311

For all aircraft

(3) When PART A of this service bulletin is completed, make this entry in the

applicable logbooks: Service Bulletin 601R−71−034, Revision B, Power

Plant − Cowling − Installation of Additional Attaching Hardware on the

Engine Nose Access-Cowls, PART A, incorporated."
SERVICE BULLETIN 601R−71−034

SB 601R−71−034

Page 9 of 13

Mar 31/2014

Revision B, Aug 1/2014

PART B − Installation of Additional Attaching Hardware on the Right Nose

Access-Cowls

D. Job Set-Up

(1) Open, safety, and tag the circuit breakers that follow:

For Aircraft 7003 thru 7067 and 7069 thru 7890

CB PANEL CB NO. NAME ZONE

CBP−1 M2 ENG IGN A 221

CBP−1 M3 ENG IGN B 221

CBP−1 M4 ENG START R 221

CBP−3 B7 ENG IGN A 221

CBP−4 B6 THRUST REV AUTO STOW 2 222

CBP−4 B8 THRUST REV 2 222

CBP−5 B1 ENG IGN B 311

For Aircraft 7891 thru 7990 and 8000 thru 8999

CB PANEL CB NO. NAME ZONE

CBP−1 M3 ENG IGN B 221

CBP−1 M4 ENG START R 221

CBP−3 B7 ENG IGN A 221

CBP−4 B6 THRUST REV AUTO STOW 2 222

CBP−4 B8 THRUST REV 2 222

CBP−4 C6 ENG IGN A 222

CBP−5 B1 ENG IGN B 311
SERVICE BULLETIN 601R−71−034

SB 601R−71−034

Page 10 of 13

Mar 31/2014

Revision B, Aug 1/2014

E. Procedure

Refer to Figure 1.

(1) Do Short Brothers Service Bulletin CF34−NAC−71−042, Part B.

(2) If it is not possible to complete all the instructions in this service bulletin

because of the configuration of the aircraft, speak with a representative of

Bombardier Customer Response Centre at phone number 514−855−8500 or

send an e−mail at thd.crj@bombardier.com for analysis and to get an

approved disposition to complete this service bulletin.

F. 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:

For Aircraft 7003 thru 7067 and 7069 thru 7890

CB PANEL CB NO. NAME ZONE

CBP−1 M2 ENG IGN A 221

CBP−1 M3 ENG IGN B 221

CBP−1 M4 ENG START R 221

CBP−3 B7 ENG IGN A 221

CBP−4 B6 THRUST REV AUTO STOW 2 222

CBP−4 B8 THRUST REV 2 222

CBP−5 B1 ENG IGN B 311
SERVICE BULLETIN 601R−71−034

SB 601R−71−034

Page 11 of 13

Mar 31/2014

Revision B, Aug 1/2014

For Aircraft 7891 thru 7990 and 8000 thru 8999

CB PANEL CB NO. NAME ZONE

CBP−1 M3 ENG IGN B 221

CBP−1 M4 ENG START R 221

CBP−3 B7 ENG IGN A 221

CBP−4 B6 THRUST REV AUTO STOW 2 222

CBP−4 B8 THRUST REV 2 222

CBP−4 C6 ENG IGN A 222

CBP−5 B1 ENG IGN B 311

For all aircraft

(3) When PART B of this service bulletin is completed, make this entry in the

applicable logbooks: Service Bulletin 601R−71−034, Revision B, Power

Plant − Cowling − Installation of Additional Attaching Hardware on the

Engine Nose Access-Cowls, PART B, incorporated."
SERVICE BULLETIN 601R−71−034

SB 601R−71−034

Page 12 of 13

Mar 31/2014

Revision B, Aug 1/2014

Component Locator

Figure 1 (Sheet 1 of 1)

rsb601r71034_001.dg, kp, December 13, 2013

UPPER NOSE

ACCESS−COWL (REF)

LOWER NOSE

ACCESS−COWL (REF)

LEFT SIDE SHOWN

RIGHT SIDE OPPOSITE
SERVICE BULLETIN 601R−71−034

SB 601R−71−034

Page 13 of 13

Mar 31/2014

Revision B, Aug 1/2014

3. MATERIAL INFORMATION

A. Kit Information

Refer to Short Brothers Service Bulletin CF34−NAC−71−042.

B. Consumable Information

For a list of consumables, refer to the Short Brothers service bulletin that is given as

a reference in this service bulletin.

C. Special Tools and Equipment

For a list of special tools and equipment, refer to the Short Brothers service bulletin

that is given as a references in this service bulletin.

D. Disposition of Parts

Refer to Short Brothers Service Bulletin CF34−NAC−71−042.

1 
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Instructions to do the service bulletin are

accurate.

Comments:

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Figure(s), picture(s), and/or Appendix

were helpful to do the service bulletin.

Comments:

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Part(s) or kit(s) agreed with the service

bulletin requirement.

Comments:

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The service bulletin was accomplished

within the estimated time given.

Comments:

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Overall, I was satisfied with this service

bulletin.

Comments:

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Operator: Service Centre:

Name: Telephone or Fax:

FAX your comments or feedback to (450) 476---7300

or e-mail to crj_sb_evaluation_form@aero.bombardier.com