SERVICE BULLETIN ATR42 

Revision No. 03 - Jan 21/15 Service Bulletin No. ATR42-92-0024 

 Page TS-1 of TS-3 

TRANSMITTAL SHEET

Revision No. 03 

This page transmits Revision No. 03 of Service Bulletin No. ATR42-92-0024. 

General information concerning this document is available in Service Letter No. ATR42-00-5005. 

TITLE: Electrical routing - Inspection of harness routing (2M-2S-6M) and air 

conditioning above 90VU 

© ATR. All rights reserved. Confidential and proprietary document. 

This document shall not be reproduced or disclosed to a third party 

without the written consent of ATR. This document and its content 

shall not be used for any purpose other than that for which it is supplied. 

ATR, its logo, the distinctive ATR aircraft profiles and patented information 

relating to the ATR aircraft are the exclusive property of ATR and are subject 

to copyright. This document and all information contained herein are the sole 

property of ATR. No intellectual property right is granted through, or induced by, 

the delivery of this document or the disclosure of its content. 
SERVICE BULLETIN ATR42 

Revision No. 03 - Jan 21/15 Service Bulletin No. ATR42-92-0024 

Page TS-2 of TS-3 © ATR. All rights reserved. Confidential and proprietary document. 

1 – ADDITIONAL WORK

A- IMPACT ON PROCEDURE

The changes introduced by this Revision do not affect aircraft on which the present Service 

Bulletin has already been applied. 

B- IMPACT ON COMPONENTS

The associated spare parts already delivered remain valid. 

2 – TECHNICAL IMPACT ON REVISED PAGES

Layout changes due to computerization of this revision are not identified. 

Page PI-1 - Para. 1.A.(2), MSN 1014 added.

Page PI-2 - Para. 1.D., sentence updated. 

3 – TABLE OF CONTENTS 

TRANSMITTAL SHEET ...................................................................................Page TS-1 to TS-3 

ACCOMPLISHMENT REPORT ...................................................................... Page AR-1 to AR-3 

PLANNING INFORMATION............................................................................... Page PI-1 to PI-4 

MATERIAL INFORMATION.............................................................................. Page MI-1 to MI-3 

ACCOMPLISHMENT INSTRUCTIONS ............................................................. Page AI-1 to AI-5 

ILLUSTRATIONS................................................................................................ Page IL-1 to IL-5 
SERVICE BULLETIN ATR42 

Revision No. 03 - Jan 21/15 Service Bulletin No. ATR42-92-0024 

Page TS-3 of TS-3 © ATR. All rights reserved. Confidential and proprietary document. 

4 – REVISION SEQUENCES 

Issue or Revision Date Additional work 

 

Original issue Jun 06/13 - 

Revision No. 01 Jan 16/14 Yes 

Revision No. 02 Apr 17/14 No 

Revision No. 03 Jan 21/15 No 

 
SERVICE BULLETIN ATR42 

Revision No. 03 - Jan 21/15 Service Bulletin No. ATR42-92-0024 

 Page AR-1 © ATR. All rights reserved. Confidential and proprietary document. 

ACCOMPLISHMENT REPORT 

SERVICE BULLETIN No. ATR42-92-0024 

Revision No. 03 

Send this report to: 

ATR RETROFIT ENGINEERING 

1 ALLEE PIERRE NADOT 

31712 BLAGNAC CEDEX 

FRANCE 

phone : +33 (0)5 62 21 62 21 

fax : +33 (0)5 62 21 69 41 

e-mail : techdesk@atr.fr 

Aircraft identification

Aircraft MSN (on which this Service Bulletin has been accomplished): 

Aircraft registration number: 

Number of flights: 

Flight hours: 
SERVICE BULLETIN ATR42 

Revision No. 03 - Jan 21/15 Service Bulletin No. ATR42-92-0024 

 Page AR-2 © ATR. All rights reserved. Confidential and proprietary document. 

Inspection results

Tick (3) the appropriate box 

Yes No 

Is electrical routing in correct position as per Figure 2? 

Is air conditioning flexible hose in correct position as per Figure 2? 

Is the bracket installed as per Figure 3? 

Have you installed the electrical routing in correct position as per Figure 5? 

Have you installed the air conditioning flexible hose in correct position 

as per Figures 4 and 5? 

NOTE: Provide a picture in case of incorrect position of the electrical routing or air conditioning 

flexible hose. 

Remarks: ______________________________________________________________________ 

______________________________________________________________________________ 

______________________________________________________________________________ 

______________________________________________________________________________ 

Performed actions: ______________________________________________________________ 

______________________________________________________________________________ 

______________________________________________________________________________ 

______________________________________________________________________________ 

Accomplishment date of this Service Bulletin: 
SERVICE BULLETIN ATR42 

Revision No. 03 - Jan 21/15 Service Bulletin No. ATR42-92-0024 

 Page AR-3 © ATR. All rights reserved. Confidential and proprietary document. 

Maintenance organisation identification

Maintenance organisation name: 

Name & Signature: 

Date: 
SERVICE BULLETIN ATR42 

Revision No. 03 - Jan 21/15 Service Bulletin No. ATR42-92-0024 

Page PI-1 © ATR. All rights reserved. Confidential and proprietary document. 

COMPLIANCE: MANDATORY INSPECTION: 008/2013 

TITLE: Electrical routing - Inspection of harness routing (2M-2S-6M) and air 

conditioning above 90VU 

1. PLANNING INFORMATION

A. EFFECTIVITY

(1) Aircraft models 

ATR42-200 ATR42-300 ATR42-320 ATR42-400 ATR42-500 

NO NO NO YES YES 

(2) Aircraft 

MSN Kit(s) 

443, 445, 457, 462, 466, 471, 474, 476, 480, 

484, 487, 490, 491, 495, 497, 500, 501, 502, 

503, 504, 506, 507, 510, 511, 512, 513, 514, 

515, 516, 518, 520, 522, 524, 526, 528, 530, 

532, 534, 537, 539, 542, 544, 546, 549, 551, 

554, 556, 559, 561, 564, 566, 569, 571, 574, 

576, 579, 581, 584, 586, 589, 591, 594, 596, 

599, 601, 602, 603, 604, 605, 606, 607, 608, 

609, 610, 611, 612, 613, 614, 615, 616, 617, 

618, 619, 620, 621, 622, 623, 625, 627, 629, 

631, 633, 637, 639, 641, 643, 645, 647, 649, 

651, 653, 655, 657, 659, 661, 663, 665, 667, 

669, 671, 673, 675, 689, 691, 693, 695, 800, 

801, 802, 803, 804, 807, 815, 819, 823, 827, 

831, 835, 839, 844, 849, 854, 859, 1001, 1003, 

1004, 1006, 1014 

None 
SERVICE BULLETIN ATR42 

Revision No. 03 - Jan 21/15 Service Bulletin No. ATR42-92-0024 

Page PI-2 © ATR. All rights reserved. Confidential and proprietary document. 

For each aircraft MSN, operator should order the mentioned kit(s). 

Other parts or equipment could be required for embodiment of this Service Bulletin. 

Please refer to chapter "MATERIAL INFORMATION" for details. 

(3) Spares 

The following stock items are modifiable (or not) according to the table below. 

None. 

B. REASON

In order to avoid a chafing between harness routes (2M-2S-6M) and metallic structure of 

the cargo lining panel, this Service Bulletin provides instructions to inspect electrical 

routing and air conditioning flexible hose on the top of 90VU electric rack and to correct if 

necessary. 

COMPLIANCE: Accomplishment of this Service Bulletin is mandatory. 

The Airworthiness Directive No. 2014-0052 has been issued by EASA. 

C. DESCRIPTION

Accomplishment of this Service Bulletin consists in carrying out the following jobs: 

(1) In zone 223, on the top of 90VU, on frame 13, between stringers 3RH and 4RH, 

inspection of electrical routing (2M-2S-6M) and air conditioning flexible hose position 

(2) In zone 223, on the top of 90VU, on frame 13, inspection of electrical routing and air 

conditioning bracket. 

According to inspection results: 

(3) In zone 223, on the top of 90VU, on frame 13, between stringers 3RH and 4RH, 

installation of electrical routing (2M-2S-6M) and air conditioning flexible hose in the 

correct position 

See Figure 1 for flowchart. 

D. APPROVAL

The technical content of this document (Rev. No. 03) is approved under the authority of 

DOA No. EASA.21J.044. 
SERVICE BULLETIN ATR42 

Revision No. 03 - Jan 21/15 Service Bulletin No. ATR42-92-0024 

Page PI-3 © ATR. All rights reserved. Confidential and proprietary document. 

E. MANPOWER

(1) Valid only for inspection 

Manhours 

Mechanic None 

Electrician 1 

Total manhours 1 

Elapsed time (hours) 1 

The above estimates are only provided for general guidance in operator's modification 

planning. 

NOTE: This Service Bulletin assumes that the aircraft has been placed in the 

appropriate maintenance configuration. The manhours/elapsed time estimates 

do not include preparation for the inspection, non-productive elapsed time or 

administrative functions. 

(2) Valid only for modification 

Manhours 

Mechanic None 

Electrician 3 

Total manhours 3 

Elapsed time (hours) 3 

The above estimates are only provided for general guidance in operator's modification 

planning. 

NOTE: This Service Bulletin assumes that the aircraft has been placed in the 

appropriate maintenance configuration. The manhours/elapsed time estimates 

do not include preparation for the modification, non-productive elapsed time or 

administrative functions. 
SERVICE BULLETIN ATR42 

Revision No. 03 - Jan 21/15 Service Bulletin No. ATR42-92-0024 

Page PI-4 © ATR. All rights reserved. Confidential and proprietary document. 

F. WEIGHT AND BALANCE

None. 

G. REFERENCES

The following publications have to be used during accomplishment of this Service Bulletin: 

AMM : 06-41-20 

 

AMM (JIC) : 24-40-00 EAD 10000

 

SPM : 20-27-17 

 

Technical Instruction No. ATR42-14-00 

The following modifications and/or retrofit documents are mentioned on this Service 

Bulletin: 

Modification Retrofit 

document Title 

 

06422 - AIR CONDITIONING - IMPROVE COCKPIT 

VENTILATION DUCT ROUTING 

 

H. AFFECTED PUBLICATIONS

(1) Maintenance documentation 

None. 

(2) Operational documentation 

None. 
SERVICE BULLETIN ATR42 

Revision No. 03 - Jan 21/15 Service Bulletin No. ATR42-92-0024 

 Page MI-1 © ATR. All rights reserved. Confidential and proprietary document. 

2. MATERIAL INFORMATION

A. MATERIAL - COST AND AVAILABILITY

(1) Material 

Parts cost and availability, or any further commercial information about Service 

Bulletin, may be consulted through ATRactive or operator should contact ATR at the 

following addresses: 

www.atractive.com 

ATR CUSTOMER SERVICES 

SPARES SUPPORT 

1 ALLEE PIERRE NADOT 

31712 BLAGNAC CEDEX 

FRANCE 

phone : +33 (0)5 62 21 60 33 

fax : +33 (0)5 62 21 62 80 

e-mail : spares.quotations@atr.fr 

Or operator should contact the ATR center it is related to, according to its operational 

area, at the following addresses: 

ATR Americas, Inc. 

4355 NW 36th St. 

Miami Springs, FL 33166 

USA 

phone : +1 (305) 704 9812 

fax : +1 (305) 704 9806 

e-mail : commercialservices@atramericas.com 

ATR EASTERN SUPPORT Pte Ltd. 

51 CHANGI BUSINESS PARK CENTRAL 2 

#08-02 THE SIGNATURE 

SINGAPORE 486066 

phone : +65 6542 0122 

fax : +65 6542 1047 

e-mail : commercial.services@atr.com.sg 

Operator should place a purchase order specifying parts reference through ATRactive 

or to the ATR center it is related to according to its operational area. 
SERVICE BULLETIN ATR42 

Revision No. 03 - Jan 21/15 Service Bulletin No. ATR42-92-0024 

 Page MI-2 © ATR. All rights reserved. Confidential and proprietary document. 

B. LIST OF COMPONENTS

Item Part Number Qty Description 

 

 Material 

 

6 NAS1149F0332P 1 Washer 

1 NAS1801-3-12 1 Screw 

2 NSA5067-3-1 1 Nut 

3 NSA5516-27ND 1 Clamp 

or 

3 NSA5516-28ND 1 Clamp 

5 NSA5516-32ND 1 Clamp 

or 

5 NSA5516-33ND 1 Clamp 

or 

5 NSA5516-34ND 1 Clamp 

or 

5 NSA5516-35ND 1 Clamp 

or 

5 NSA5516-36ND 1 Clamp 

or 

5 NSA5516-37ND 1 Clamp 

or 

5 NSA5516-38ND 1 Clamp 

or 

5 NSA5516-39ND 1 Clamp 

4 NSA5527-03-04 1 Spacer 

- S5318953021202 1 Bracket 

 

NOTE: P/N of clamp item 5 depends on bundle diameter. 

C. LIST OF MATERIALS - OPERATOR SUPPLIED

None. 
SERVICE BULLETIN ATR42 

Revision No. 03 - Jan 21/15 Service Bulletin No. ATR42-92-0024 

 Page MI-3 © ATR. All rights reserved. Confidential and proprietary document. 

D. SPECIAL TOOLS

Accomplishment of this Service Bulletin requires use of the following special tools: 

None. 
SERVICE BULLETIN ATR42 

Revision No. 03 - Jan 21/15 Service Bulletin No. ATR42-92-0024 

 Page AI-1 © ATR. All rights reserved. Confidential and proprietary document. 

3. ACCOMPLISHMENT INSTRUCTIONS

A. GENERAL

The following instructions assume that work will be accomplished when the aircraft is in 

the appropriate maintenance configuration. 

B. JOB SET-UP

(1) De-energize the aircraft electrical network and connect the aircraft to ground as per 

AMM (JIC) 24-40-00 EAD 10000. 

(2) In forward compartment, remove ceiling panels 221AC, 222BC, 222KZ and 222LZ 

(Refer to AMM 06-41-20). 

C. INSPECTION

NOTE: After accomplishment of this Service Bulletin, fill the enclosed Accomplishment 

Report and send it to the address mentioned on the Accomplishment Report. 

CAUTION: IF WIRES OF THE BUNDLE ARE DAMAGED, PERFORM REPAIR OF 

ELECTRICAL CABLES AS PER SPM 20-27-17. 

(1) In zone 223, on the top of 90VU, on frame 13, between stringers 3RH and 4RH, 

inspection of electrical routing (2M-2S-6M) and air conditioning flexible hose position 

Refer to Figure 2 

(a) If the electrical routing and air conditioning flexible hose are in the correct 

position 

Perform paragraph 3.F. 

(b) If at least the electrical routing or the air conditioning flexible hose is in the 

incorrect position, perform the inspection of bracket as per paragraph 3.C.(2). 
SERVICE BULLETIN ATR42 

Revision No. 03 - Jan 21/15 Service Bulletin No. ATR42-92-0024 

 Page AI-2 © ATR. All rights reserved. Confidential and proprietary document. 

(2) In zone 223, on the top of 90VU, on frame 13, inspection of electrical routing and air 

conditioning bracket 

As per Figure 3, verify if the bracket is installed and verify its location. 

NOTE: The bracket must be attached with 4th and 5th rivets. 

(a) If the bracket is installed at the correct location. 

Perform paragraph 3.D. 

(b) If the bracket is not installed, or if its location is not correct: 

1 Order a bracket P/N S5318953021202 in quantity 1 by referring to chapter 

“MATERIAL INFORMATION”. 

2 Install the bracket as per Technical Instruction No. ATR42-14-00. 

NOTE: If the configurations given in Technical Instruction No. ATR42-14-00 

do not match with aircraft configuration, contact ATR at the following 

address: 

ATR TECHDESK 

1 ALLEE PIERRE NADOT 

31712 BLAGNAC CEDEX 

FRANCE 

phone : +33 (0)5 62 21 62 21 

fax : +33 (0)5 62 21 69 41 

e-mail : techdesk@atr.fr 

3 Perform paragraph 3.D. 
SERVICE BULLETIN ATR42 

Revision No. 03 - Jan 21/15 Service Bulletin No. ATR42-92-0024 

 Page AI-3 © ATR. All rights reserved. Confidential and proprietary document. 

D. MODIFICATION

(1) In zone 223, on the top of 90VU, on frame 13, between stringers 3RH and 4RH, 

installation of electrical routing (2M-2S-6M) and air conditioning flexible hose in the 

correct position 

(a) As per Figure 2, if air conditioning is not on aisle side of pin item 13. 

1 As per Figure 4, in order to pull down the pin item 13, remove all the parts 

listed in the following table. 

REMOVAL 

Item Description Part Number Qty 

Discarded 

Qty 

Re-used Figure

 

10 Screw NAS1132-2 - 2 4 

11 Washer NTA11551-2NACU - 2 4 

12 Stop S9247800620800 - 1 4 

 

2 Position the air conditioning at the correct location. 

3 Put the pin item 13 in upper position and install all the parts listed in the 

following table. 

INSTALLATION 

Item Description Part Number Qty 

New 

Qty from

Removal Figure

 

12 Stop S9247800620800 - 1 4 

11 Washer NTA11551-2NACU - 2 4 

10 Screw NAS1132-2 - 2 4 

 
SERVICE BULLETIN ATR42 

Revision No. 03 - Jan 21/15 Service Bulletin No. ATR42-92-0024 

 Page AI-4 © ATR. All rights reserved. Confidential and proprietary document. 

(b) As per Figure 5, perform the correct installation of electrical routing and air 

conditioning by installing all the parts listed below: 

- Item 4, spacer P/N NSA5527-03-04 in quantity 1, 

- Item 5, clamp P/N NSA5516-32ND or NSA5516-33ND or NSA5516-34ND or 

NSA5516-35ND or NSA5516-36ND or NSA5516-37ND or NSA5516-38ND or 

NSA5516-39ND in quantity 1, 

NOTE 1: P/N of clamp item 5 depends on bundle diameter. 

- Item 3, clamp P/N NSA5516-27ND or NSA5516-28ND (valid for aircraft 

equipped with modification No. 06422) in quantity 1, 

- Item 6, washer P/N NAS1149F0332P in quantity 1, 

- Item 2, nut P/N NSA5067-3-1 in quantity 1, 

- Item 1, screw P/N NAS1801-3-12 in quantity 1; 

NOTE 2: If a requested P/N listed above is missing, please refer to chapter 

“MATERIAL INFORMATION”. 

NOTE 3: Carefully move the electrical harness to its correct position. 

E. TESTS

WARNING: DISPLAY WARNING NOTICE PROHIBITING PRESSURIZATION OF 

PNEUMATIC SYSTEM AND OPERATION OF AIR CONDITIONING 

SYSTEM. 

(1) Re-energize the aircraft electrical network and disconnect the aircraft from ground as 

per AMM (JIC) 24-40-00 EAD 10000. 

(2) On 22VU, place PACK VALVE 1 (PACK VALVE 2) pushbutton switch in "OFF" 

position. 

(3) Make certain that cabin doors are open. 

(4) On panel 22VU, press RECIRC FAN 1(2) pushbutton switch and verify that "OFF" 

legend goes off. 

(5) Make certain that air goes out from flight compartment (cabin) air outlets. 

(6) On panel 22VU, release RECIRC FAN 1(2) pushbutton switch. 
SERVICE BULLETIN ATR42 

Revision No. 03 - Jan 21/15 Service Bulletin No. ATR42-92-0024 

 Page AI-5 © ATR. All rights reserved. Confidential and proprietary document. 

(7) Remove warning notice. 

F. CLOSE-UP

(1) In forward cargo compartment, re-install ceiling panels 221AC, 222BC, 222KZ and 

222LZ (Refer to AMM 06-41-20). 
SERVICE BULLETIN ATR42 

Revision No. 03 - Jan 21/15 Service Bulletin No. ATR42-92-0024 

 Page IL-1 © ATR. All rights reserved. Confidential and proprietary document. 

ILLUSTRATIONS 

CAUTION: IF WIRES OF THE BUNDLE ARE DAMAGED, PERFORM REPAIR OF ELECTRICAL 

CABLES AS PER SPM 20-27-17. 

Flowchart 

Figure 1 

A per § 3.B. 

Perform Job Set -up

NO 

As per § 3.F.

Close-up

Refer to § 3.C.(2) 

Is the bracket installed at 

the correct location? 

YES

Order a bracket 

P/N S5318953021202 

and install it as per 

Technical Instruction 

No. ATR42-14-00 

NO 

As per § 3.D. 

Position the electrical routing and air 

conditioning flexible hose at the correct 

location 

As per § 3.E. 

Perform tests 

Refer to § 3.C.(1) 

Are electrical routing and 

air conditioning flexible 

hose in the correct 

position? 

YES 
SERVICE BULLETIN ATR42 

Revision No. 03 - Jan 21/15 Service Bulletin No. ATR42-92-0024 

 Page IL-2 

© ATR. All rights reserved. Confidential and proprietary document. 

In zone 223, on the top of 90VU, on frame 13, between stringers 3RH and 4RH, 

inspection of electrical routing (2M-2S-6M) and 

air conditioning flexible hose position 

Figure 2 
SERVICE BULLETIN ATR42 

Revision No. 03 - Jan 21/15 Service Bulletin No. ATR42-92-0024 

 Page IL-3 

© ATR. All rights reserved. Confidential and proprietary document. 

In zone 223, on the top of 90VU, on frame 13, between stringers 3RH and 4RH, 

inspection of bracket 

Figure 3 
SERVICE BULLETIN ATR42 

Revision No. 03 - Jan 21/15 Service Bulletin No. ATR42-92-0024 

 Page IL-4 © ATR. All rights reserved. Confidential and proprietary document. 

In zone 223, relocation of air conditioning 

Figure 4 
SERVICE BULLETIN ATR42 

Revision No. 03 - Jan 21/15 Service Bulletin No. ATR42-92-0024 

 Page IL-5 

© ATR. All rights reserved. Confidential and proprietary document. 

In zone 223, on the top of 90VU, on frame 13, between stringers 3RH and 4RH, 

installation of electrical routing (2M-2S-6M) and 

air conditioning flexible hose in correct position 

Figure 5