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SERVICE BULLETIN ATR42 Revision No. 01 - Nov 29/24 Service Bulletin No. ATR42-27-0118
Page TS-1 of TS-3
TRANSMITTAL SHEET Revision No. 01 This page transmits Revision No. 01 of Service Bulletin No. ATR42-27-0118.
General information concerning this document is available in Service Letter No. ATR42-00-5005.
For any technical request regarding this document, please contact ATR at the following address:
- through ATRactive at www.atractive.com (select “Request ATR”, Theme “Engineering & Maintenance”, Type “Retrofit Engineering”)
- otherwise by mail at the following address technical.toulouse@atr-aircraft.com TITLE: Flight controls - New Avionics Suite - Consolidate TLU command and monitoring logics
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.
This document has been reviewed and was determined to not be subject to U.S. nor E.U. export controls.
SERVICE BULLETIN ATR42
Revision No. 01 - Nov 29/24 Service Bulletin No. ATR42-27-0118
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 affect all aircraft on which the present Service Bulletin has already been applied.
For these aircraft, perform the functional test of the rudder Travel Limiter Unit as per Para. 3.D.(5), except for the following MSN:
- MSN 1002 if Technical Adaptation ref. SCOB-1508/24 has been embodied.
B- IMPACT ON COMPONENTS The associated kits already delivered remain valid.
2 – TECHNICAL IMPACT ON REVISED PAGES Layout changes due to computerization of this revision and to modification of maintenance documents references (new S1000D format) are not identified.
Page PI-3 - Para.1.G., MP task reference ATR-A-24-46-XX-00ZZZ-761Z-A and AOM ref. 2024/09 added.
Page PI-4 - Para. 1.H.(1), AFI corrected, AWD 27-36 deleted, ASD 27-51 and SD 27-23 added.
Page AI-3 - Para. 3.D.(1), MP task reference ATR-A-24-4X-XX-00ZZZ-761Z-A modified by ATR-A-24-46-XX-00ZZZ-761Z-A.
Para. 3.D.(2), wording "(ground hydraulic source)" added.
Para. 3.D.(3), wording "green" added at step 2 of test procedure table.
Page AI-4 - Para. 3.D.(3), 1B information corrected by 2B at step 9 of test procedure table.
Para. 3.D.(4), wording "(ground hydraulic source)" added.
Page AI-5 - Para. 3.D.(5), functional test of the rudder Travel Limiter Unit corrected.
SERVICE BULLETIN ATR42
Revision No. 01 - Nov 29/24 Service Bulletin No. ATR42-27-0118
Page TS-3 of TS-3 ATR. All rights reserved. Confidential and proprietary document.
3 – TABLE OF CONTENTS TRANSMITTAL SHEET ................................................................................. Page TS-1 to TS-3 ACCOMPLISHMENT REPORT ..................................................................... Page AR-1 to AR-1 PLANNING INFORMATION ............................................................................. Page PI-1 to PI-5 MATERIAL INFORMATION ............................................................................ Page MI-1 to MI-2 ACCOMPLISHMENT INSTRUCTIONS ............................................................ Page AI-1 to AI-5 ILLUSTRATIONS ............................................................................................ Page IL-1 to IL 12
4 – REVISION SEQUENCES
Issue or Revision Date Additional work
Original issue Aug 09/24 - Revision No. 01 Nov 29/24 Yes
SERVICE BULLETIN ATR42 Revision No. 01 - Nov 29/24 Service Bulletin No. ATR42-27-0118
Page AR-1 ATR. All rights reserved. Confidential and proprietary document.
ACCOMPLISHMENT REPORT SERVICE BULLETIN No. ATR42-27-0118 Revision No. 01 TITLE: Flight controls - New Avionics Suite - Consolidate TLU command and monitoring logics Send this report:
- through ATRactive at www.atractive.com (select “Request ATR”, Theme “Engineering & Maintenance” and Type “Retrofit - Accomplishment report”)
- otherwise by mail at the following address “techdesk@atr-aircraft.com” Aircraft identification Aircraft MSN (on which this Service Bulletin has been accomplished):
Aircraft registration number:
Flight cycles:
Flight hours:
Accomplishment date of this Service Bulletin:
Maintenance organization identification Maintenance organization name:
Name & Signature:
Date:
SERVICE BULLETIN ATR42
Revision No. 01 - Nov 29/24 Service Bulletin No. ATR42-27-0118
Page PI-1 ATR. All rights reserved. Confidential and proprietary document.
COMPLIANCE: RECOMMENDED MODIFICATION: 10469 L3941
TITLE: Flight controls - New Avionics Suite - Consolidate TLU command and monitoring logics
1. PLANNING INFORMATION A. EFFECTIVITY
(1) Aircraft models The approved change used to generate this document has been certified on the following ATR42 models:
ATR42-200 ATR42-300 ATR42-320 ATR42-400 ATR42-500
NO NO NO YES YES
(2) Aircraft MSN Kit(s) S270118 859, 1001, 1002, 1003, 1004, 1005, 1006, 1007, 1008, 1009, 1010, 1011, 1012, 1013, 1014, 1016, 1017, 1018, 1019, 1201, 1202, 1203, 1204, 1205, 1206, 1207, 1208, 1209, 1210, 1211, 1212, 1213, 1214, 1215, 1216, 1217, 1218, 1219, 1401, 1402, 1403, 1404, 1405, 1406, 1407, 1408, 1409, 1410, 1411, 1412, 1413, 1414, 1415, 1416, 1417, 1418, 1419, 1601, 1602, 1603, 1605, 1606, 1607, 1608, 1609, 1610, 1611, 1612, 1613, 1614, 1615, 1616 A01 + A02 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.
SERVICE BULLETIN ATR42
Revision No. 01 - Nov 29/24 Service Bulletin No. ATR42-27-0118
Page PI-2 ATR. All rights reserved. Confidential and proprietary document.
NOTE: This Service Bulletin is applicable only on aircraft on which modification No. 05948 has been embodied.
(3) Spares The following stock items are modifiable (or not) according to the table below.
None.
B. REASON It has been evidenced that an erroneous monitoring of the rudder TLU (Travel Limitation Unit) could occur when the aircraft is flying above 195kt due to the fact that the logic only takes into account ADC1 or ADC2 input.
Accomplishment of this Service Bulletin consists in installing two relays and associated wiring in order to consolidate TLU command and monitoring logics considering both ADC1 and ADC2 inputs.
For additional information regarding this Service Bulletin, refer to the AOM ref. 2024/09.
The change introduced by this Service Bulletin impacts the Time Limits.
COMPLIANCE: Accomplishment of this Service Bulletin is recommended by ATR.
C. DESCRIPTION Accomplishment of this Service Bulletin consists in carrying out the following jobs:
(1) On shelf 91VU, installation of relay (FIN 32CY)
(2) On shelf 92VU, installation of relay (FIN 31CY)
(3) Wiring modification D. APPROVAL The technical content of this document is approved under the authority of the DOA ref. EASA.21J.044.
SERVICE BULLETIN ATR42
Revision No. 01 - Nov 29/24 Service Bulletin No. ATR42-27-0118
Page PI-3 ATR. All rights reserved. Confidential and proprietary document.
E. MANPOWER Manhours Mechanic None Electrician 40 Total manhours 40 Elapsed time (hours) 25
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.
F. W EIGHT AND BALANCE Effect on weight : + 0.129 kg (+ 0.284 lb).
Effect on balance : + 0.718 kg.m (+ 62.319 lb.in).
G. REFERENCES The following publications have to be used during accomplishment of this Service Bulletin:
AOM : 2024/09
MIPD : 25-13-10
MP : 20-21-21 ATR-A-24-4X-XX-00ZZZ-561Z-A ATR-A-24-4X-XX-00ZZZ-761Z-A ATR-A-24-46-XX-00ZZZ-761Z-A ATR-A-25-13-10-01ZZZ-520Z-A ATR-A-25-13-10-01ZZZ-720Z-A ATR-A-27-23-XX-00ZZZ-340Z-A ATR-A-29-XX-XX-01ZZZ-562Z-A ATR-A-29-XX-XX-01ZZZ-762Z-A
SERVICE BULLETIN ATR42
Revision No. 01 - Nov 29/24 Service Bulletin No. ATR42-27-0118
Page PI-4 ATR. All rights reserved. Confidential and proprietary document.
The following modifications and/or retrofit documents are mentioned on this Service Bulletin:
Modification Retrofit document Title
05948 - NAVIGATION - INSTALL NEW AVIONICS SUITE
H. AFFECTED PUBLICATIONS
(1) Maintenance documentation The following maintenance manuals will be updated after receipt of the Accomplishment Report by ATR:
AFI : 27-23
ASD : 27-23 27-51 42-11
AWD : 27-23 27-51 31-53 42-11 91-10 AWL
MIPD : 27-23
MP : 27-23
SD : 27-23
(2) Operational documentation The following operational manuals are impacted.
Operators should verify the List of Modifications (LOM) of these manuals to verify that the modification No. 10469 is mentioned.
AFM : The EASA AFM revision is approved. In case of specific AFM issued for a local Authority, the operator must make sure the corresponding AFM revision has been approved by its local Authority.
SERVICE BULLETIN ATR42
Revision No. 01 - Nov 29/24 Service Bulletin No. ATR42-27-0118
Page PI-5 ATR. All rights reserved. Confidential and proprietary document.
FCOM
MMEL
QRH
In case the material is not purchased through a kit, the operator should contact ATR at the following address to obtain the impacted operational documentation:
ATR UPGRADE SERVICES TOULOUSE e-mail : Upgrade-Services@atr-aircraft.com
SERVICE BULLETIN ATR42
Revision No. 01 - Nov 29/24 Service Bulletin No. ATR42-27-0118
Page MI-1 ATR. All rights reserved. Confidential and proprietary document.
2. MATERIAL INFORMATION A. MATERIAL - COST AND AVAILABILITY
(1) Kits Kits 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 UPGRADE SERVICES TOULOUSE e-mail : Upgrade-Services@atr-aircraft.com
Or operator should contact the ATR center it is related to, according to its operational area, at the following addresses:
ATR AMERICAS SERVICES MIAMI e-mail : commercial.services.miami@atr-aircraft.com
ATR EASTERN SUPPORT SINGAPORE e-mail : commercial.services.singapore@atr-aircraft.com
Operator should place a purchase order specifying concerned MSN, Service Bulletin reference and kits reference (according to paragraph 1.A.) through ATRactive or to the ATR center it is related to according to its operational area.
B. LIST OF COMPONENTS Item Part Number Qty Description
Kit S270118A01
2 E0247A0S 2 Base (FIN 31CY-A and 32CY-A) 4 E0427-01 1 Retainer (FIN 31CY-A1) 1 E0666D28A0 2 Relay (FIN 31CY and 32CY) 3 MS21042-04 5 Nut 5 NAS1101-04-6 1 Screw 6 NAS1149FN416P 1 Washer
- NSA935401-03 150 Cable tie
- NSA935401-04 150 Cable tie
- NSA935401-05 150 Cable tie
SERVICE BULLETIN ATR42
Revision No. 01 - Nov 29/24 Service Bulletin No. ATR42-27-0118
Page MI-2 ATR. All rights reserved. Confidential and proprietary document.
Item Part Number Qty Description
Kit S270118A02
- S9110252400195 1 Placard set
- S9110308400195 1 Bundle
C. LIST OF MATERIALS - OPERATOR SUPPLIED None.
D. SPECIAL TOOLS Accomplishment of this Service Bulletin requires use of the following special tools:
None.
SERVICE BULLETIN ATR42
Revision No. 01 - Nov 29/24 Service Bulletin No. ATR42-27-0118
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 MP ATR-A-24-4X-XX-00ZZZ-561Z-A.
(2) On 80VU and 90VU, remove lining panels 211WZ, 211XZ, 213CZ, 214CZ, 221FZ, 221KZ, 222FZ and 222KZ as per MP ATR-A-25-13-10-01ZZZ-520Z-A.
(3) In flight compartment, remove central ceiling panel 213DC (refer to MIPD 25-13-10).
C. MODIFICATION
(1) On shelf 91VU, installation of relay (FIN 32CY) As per figure 1 Install all the parts listed in the following table.
INSTALLATION Item Description Part Number Qty New Qty from Removal Figure
1 Relay (FIN 32CY) E0666D28A0 1 - 1 2 Base (FIN 32CY-A) E0247A0S 1 - 1 3 Nut MS21042-04 2 - 1
Specific instruction(s):
- Position and affix placard 32CY supplied in placard set S9110252400195 to identify the relay item 1 (FIN 32CY).