# Messier-Bugatti-Dowty Service Letter A33-34

## Copies (2)

Copies the FAA filed in AD dockets on regulations.gov, newest revision first. A newer revision may exist.

- No revision named ("SL A20 R07"), 28 pages: PDF https://openairdocs.org/files/sha256/49/ba/49ba460fd5cdae9035198da0c2dbf830013593fcbf78c94620ef882ad510e91a; text https://openairdocs.org/service-documents/safran-landing-systems/a33-34/file/49ba460fd5cd.md. Rights: © Messier-Dowty. Filed by the FAA in regulations.gov docket FAA-2015-8428; AD 2017-10-24 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication.
- No revision named ("U.S. DOT/FAA - Service Information"), 26 pages: PDF https://openairdocs.org/files/sha256/7e/94/7e942e8616b2cd1361f3837cf0f0d533905bf5dd8d66d220814a0f967f52249a; text https://openairdocs.org/service-documents/safran-landing-systems/a33-34/file/7e942e8616b2.md. Rights: © Messier-Dowty. Filed by the FAA in regulations.gov docket FAA-2012-0934; AD 2012-25-12 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication.

## Details

- Manufacturer: [Messier-Dowty](https://openairdocs.org/service-documents/safran-landing-systems.md) (issued as Messier-Bugatti-Dowty)
- Type: Service letter (Service Letter)
- Number: A33-34
- Page: https://openairdocs.org/service-documents/safran-landing-systems/a33-34

## ADs that cite it (3) (OpenAirDocs)

Newest first, with the revision each names, as OpenAirDocs read it from the AD's text.

- [AD 2017-10-24](https://openairdocs.org/ad/2017-10-24.md), effective Jun 29, 2017: No revision named
- [AD 2016-01-03](https://openairdocs.org/ad/2016-01-03.md), effective Feb 17, 2016: No revision named
- [AD 2012-25-12](https://openairdocs.org/ad/2012-25-12.md), effective Jan 30, 2013: No revision named

Also cited in [2 proposed ADs](https://openairdocs.org/service-documents/safran-landing-systems/a33-34/proposed.md).

## Text (28 pages)

No revision named, the newest copy. Rights: © Messier-Dowty. Filed by the FAA in regulations.gov docket FAA-2015-8428; AD 2017-10-24 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication. Each page's text from the PDF; open the PDF at a page with #page=N.

### Page 1

Service Letter No. A33-34 A20
Page 1 of 2
CAGE: K0654
Cheltenham Road, Gloucester, GL2 9QH, England
Telephone: +44 (0) 1452 712424 Fax: +44 (0) 1452 713821
SERVICE LETTER
Messier-Dowty Ltd
 ©MESSIER-BUGATTI-DOWTY 2012 (AND SUBSEQUENT REVISION PAGE DATES)
This document and all information contained herein is the sole property of Messier-Bugatti-Dowty. No intellectual property righ ts are
granted by the delivery of this document or the disclosure of its content. This document shall not be reproduced to a third party without the
express written consent of Messier-Bugatti-Dowty.
Safran and Messier-Bugatti names are marks owned respectively by  Safran and Messier-Bugatti-Dowty companies. The mark Dowty is
used under licence.
ATTENTION: AIRBUS AIRCRAFT OPERATORS AND REPAIR STATIONS
AIRCRAFT: AIRBUS A330-200/300, A340-200/300 AND A340-500/600
UNITS: MESSIER-DOWTY LTD MAIN LANDING GEARS AND CENTER LANDING 
GEARS
SUBJECT: MATERIAL PROPERTIES OUTSIDE OF SPECIFICATION REQUIREMENTS
1. REASON
A. Messier-Dowty Ltd has found that production quality coupon testing has shown below
specification material properties.
B. This Service Letter tells operators that there wi ll be a flight hour and/or landing and/or calendar
life limitation reduction on main fittings, bogie beams and sliding pistons which are identified in
the Airbus Airworthiness Limitation Section (ALS Part 1) and this Service Letter.
C. This fatigue life limitation r eduction applies because of a potential problem in the raw material
of the main fittings, bogie beams and sliding pistons.
2. GENERAL
A. Messier-Dowty Ltd tells you that on going in vestigations and additional fatigue testing should
improve the reduced life limits of the main fittings, bogie beams and sliding pistons referenced
in this Service Letter.
3. PROCEDURE
A. Messier-Dowty Ltd tells you that if you have a main landing gear main fitting part number/serial
number which appears in Appendix A Table 1 or 2: 
(1) In Section 1 the reduced life limitation for the part number/serial number will be in the ALS
Part 1.
(2) In Section 2 the part number/serial number ar e no longer part of the suspect population:
refer to ALS Part 1 for the normal life limitation.
NOTE : If the main landing gear main fitting part number/serial number does not
appear in Appendix A, refer to ALS Part 1 for the normal life limitation.
B. Messier-Dowty Ltd tells you that if you have a main landing gear bogie beam part
number/serial number which appears in Appendix B: 
(1) In Section 1 the reduced life limitation for the part number/serial number will be in the ALS
Part 1.
Mar 13/2007
Jul 20/2012 (Revision 7)

### Page 2

Service Letter No. A33-34 A20
Page 2
SERVICE LETTER
Messier-Dowty Ltd
(2) In Section 2 the part number/serial number ar e no longer part of the suspect population:
refer to ALS Part 1 for the normal life limitation.
NOTE : If the main landing gear bogie beam part number/serial number does not
appear in Appendix B, refer to ALS Part 1 for the normal life limitation.
C. Messier-Dowty Ltd tells you that if you have a center landing gear main fitting part
number/serial number which appears in Appendix C:
(1) In Section 1 the reduced life limitation for the part number/serial number will be in the ALS
Part 1
(2) In Section 2 the part number/serial number ar e no longer part of the suspect population,
refer to ALS Part 1 for the normal life limitation.
NOTE : If the center landing gear main fitting part number/serial number does not
appear in Appendix C, refer to ALS Part 1 for the normal life limitation.
D. Messier-Dowty Ltd tells you that if you have a main landing gear sliding piston part
number/serial number which appears in Appendix D:
(1) In Section 1 the reduced life limitation for the part number/serial number will be in the ALS
Part 1.
NOTE : If the main landing gear sliding piston part number/serial number does not
appear in Appendix D, refer to ALS Part 1 for the normal life limitation.
E. Messier-Dowty Ltd tells you that if you have to replace a part listed in this Service Letter you
must order the new part and also the associated consumable material part number. Refer to
Appendix E for the detail of part numbers to be ordered.
F. Messier-Dowty Ltd tells you that Appendix F of this Service Letter provides a pro-forma which
must be used to record the removal and mutilation of unserviceable parts.
Jul 20/2012 (Revision 7)

### Page 3

Appendix A
Service Letter No. A33-34 A20
Page 1 of 10
CAGE: K0654
Cheltenham Road, Gloucester, GL2 9QH, England
Telephone: +44 (0) 1452 712424 Fax: +44 (0) 1452 713821
SERVICE LETTER
Messier-Dowty Ltd
 ©MESSIER-BUGATTI-DOWTY 2012 (AND SUBSEQUENT REVISION PAGE DATES)
This document and all information contained herein is the sole property of Messier-Bugatti-Dowty. No intellectual property righ ts are
granted by the delivery of this document or the disclosure of its content. This document shall not be reproduced to a third party without the
express written consent of Messier-Bugatti-Dowty.
Safran and Messier-Bugatti names are marks owned respectively by  Safran and Messier-Bugatti-Dowty companies. The mark Dowty is
used under licence.
APPENDIX A
AFFECTED SERIAL NUMBERS FOR MAIN LANDING GEAR MAIN FITTING LH PART NUMBERS 
201488324, 201488335, 50-1209001-02, 50-1209001-03 AND 50-2107001-00
TABLE 1
Main Fitting LH
Serial Number:
Main Fitting LH
Serial Number:
Main Fitting LH
Serial Number:
Main Fitting LH
Serial Number:
Section 1: The list of serial numbers of parts that are SUSPECTED to be affected by the 
material specification, including:
- parts with no concession (or for spare parts: not identified in a EASA form 1
or in a FAA Form 8130-3)
- parts for which a defect has been documented.
06MDM00069 (S1) 06MDM00123 (S1) 06MDM00261 (S1) 06MDM00845 (S3)
06MDM00073 (S1) 06MDM00125 (S3) 06MDM00265 (S1) 06MDM00847 (S1)
06MDM00075 (S1) 06MDM00129 (S1)* 06MDM00267 (S3) 06MDM00849 (S1)
06MDM00077 (S1) 06MDM00133 (S1) 06MDM00269 (S3) 06MDM00851 (S1)
06MDM00087 (S1) 06MDM00151 (S1) 06MDM00271 (S1) 06MDM00853 (S1)
06MDM00093 (S1) 06MDM00161 (S1) 06MDM00289 (S3) 06MDM00855 (S1)
06MDM00095 (S3) 06MDM00167 (S3) 06MDM00291 (S3) 06MDM00859 (S3)
06MDM00097 (S3) 06MDM00169 (S3) 06MDM00293 (S3) 06MDM00861 (S3)
06MDM00099 (S3) 06MDM00171 (S3) 06MDM00821 (S1) 06MDM00869 (S1)
06MDM00101 (S3) 06MDM00191 (S3) 06MDM00827 (S1) 06MDM00871 (S3)
06MDM00103 (S3) 06MDM00193 (S3) 06MDM00829 (S1) 07MDM00217 (S3)
06MDM00107 (S1) 06MDM00195 (S3) 06MDM00831 (S3) MDMCAA0141M (S3)
06MDM00111 (S3) 06MDM00197 (S3) 06MDM00833 (S3) MDMCAA0153M (S3)
06MDM00113 (S1) 06MDM00199 (S3) 06MDM00835 (S3) MDMCAA0159M (S3)
06MDM00115 (S3) 06MDM00249 (S1) 06MDM00837 (S1) MDMCAA0163M (S3)
06MDM00117 (S3) 06MDM00251 (S1) 06MDM00839 (S1) MDMCAA0165M (S3)
Jul 20/2012 (Revision 7)

### Page 4

Appendix A
Service Letter No. A33-34 A20
Page 2
SERVICE LETTER
Messier-Dowty Ltd
06MDM00119 (S1) 06MDM00255 (S1) 06MDM00841 (S1) MDMCAA0187M (S3)
06MDM00121 (S1) 06MDM00259 (S1) 06MDM00843 (S3) MDMCAA0191M (S3)
MDMCAA0195M (S3) MDMCAC0425M (S3) MDMCAC0485M (S3) MDMCAC0773M (S1)
MDMCAA0197M (S3) MDMCAC0427M (S3) MDMCAC0497M (S3) MDMCAC0783M (S1)
MDMCAA0229M (S1) MDMCAC0429M (S3) MDMCAC0517M (S3) MDMCAC0793M (S1)
MDMCAC0315M (S3) MDMCAC0431M (S3) MDMCAC0521M (S3) MDMCAC0805M (S1)
MDMCAC0321M (S3) MDMCAC0433M (S3) MD MCAC0523M (S3) MDMCAC0813M (S2C)
MDMCAC0361M (S3) MDMCAC0447M (S3) MDMCAC0547M (S3) MDMCAC0815M (S1)
MDMCAC0365M (S3) MDMCAC0461M (S3) MDMCAC0621M (S3) MDMCAC0817M (S1)
MDMCAC0369M (S3) MDMCAC0463M (S3) MDMCAC0629M (S3) MDMCAI0017M (S1)
MDMCAC0371M (S3) MDMCAC0465M (S3) MDMCAC0631M (S3) MDMCAI0023M (S1)
MDMCAC0373M (S3) MDMCAC0467M (S3) MDMCAC0639M (S3) MDMCAI0027M (S1)
MDMCAC0375M (S3) MDMCAC0471M (S3) MDMCAC0643M (S3) MDMCAI0031M (S1)
MDMCAC0383M (S3) MDMCAC0473M (S3) MDMCAC0683M (S3) MDMCAI0039M (S1)
MDMCAC0385M (S3) MDMCAC0475M (S3) MDMCAC0719M (S3) MDMCAI0041M (S1)
MDMCAC0391M (S3) MDMCAC0477M (S3) MDMCAC0753M (S3) MDMCAI0043M (S1)
MDMCAC0409M (S3) MDMCAC0481M (S3) MDMCAC0759M (S1) MDMCAI0049M (S1)
MDMCAC0421M (S3) MDMCAC0483M (S3) MDMCAC0767M (S1) MDMCAI0051M (S1)
Main Fitting LH
Serial Number:
Main Fitting LH
Serial Number:
Main Fitting LH
Serial Number:
Main Fitting LH
Serial Number:
Jul 20/2012 (Revision 7)

### Page 5

Appendix A
Service Letter No. A33-34 A20
Page 3
SERVICE LETTER
Messier-Dowty Ltd
Main Fitting LH
Serial Number:
Main Fitting LH
Serial Number:
Main Fitting LH
Serial Number:
Main Fitting LH
Serial Number:
Section 2: The list of serial numbers of parts that are NO LONGER SUSPECTED to be 
affected by the material specification, including:
- parts delivered with a concession (or for spare parts: identified either in a
EASA form 1 or in a FAA Form 8130-3)
- parts previously listed in the SL A20.
06MDM00063 06MDM00159 06MDM00279 07MDM00245
06MDM00065 06MDM00163 06MDM00281 07MDM00247
06MDM00067 06MDM00165 06MDM00285 07MDM00249
06MDM00071 06MDM00173 06MDM00287 07MDM00251
06MDM00079 06MDM00175 06MDM00823 07MDM00253
06MDM00081 06MDM00177 06MDM00825 07MDM00255
06MDM00083 06MDM00179 06MDM00857 07MDM00257
06MDM00085 06MDM00181 06MDM00863 07MDM00259
06MDM00089 06MDM00183 06MDM00865 07MDM00261
06MDM00091 06MDM00185 06MDM00867 07MDM00299
06MDM00105 06MDM00187 06MDM00879 07MDM00883
06MDM00127 06MDM00189 07MDM00215 07MDM00891
06MDM00131 06MDM00201 07MDM00219 MDMCAA0193M
06MDM00135 06MDM00203 07MDM00221 MDMCAA0199M
06MDM00137 06MDM00207 07MDM00223 MDMCAA0201M
06MDM00139 06MDM00209 07MDM00225 MDMCAA0203M
06MDM00141 06MDM00211 07MDM00227 MDMCAA0205M
06MDM00143 06MDM00213 07MDM00231 MDMCAA0207M
06MDM00145 06MDM00247 07MDM00233 MDMCAA0209M
06MDM00147 06MDM00257 07MDM00235 MDMCAA0211M
06MDM00149 06MDM00263 07MDM00237 MDMCAA0213M
06MDM00153 06MDM00273 07MDM00239 MDMCAA0215M
06MDM00155 06MDM00275 07MDM00241 MDMCAA0217M
06MDM00157 06MDM00277 07MDM00243 MDMCAA0219M
Jul 20/2012 (Revision 7)

### Page 6

Appendix A
Service Letter No. A33-34 A20
Page 4
SERVICE LETTER
Messier-Dowty Ltd
NOTE : Please refer to OIT SE 999.0012/07/LB Rev. 04 dated 05 May 08 and TFU Ref:
32.00.00.012, for information regarding (S1), (S2C) and (S3) in the above Table 1,
Section 1.
NOTE : If Messier-Dowty Limited Service Bulletin A33/34-32-257 has been done to the main
fitting part number 201488324, the new main fitting part number will be 201488335,
while keeping the same serial number.
NOTE : * Production part listed as quarantine or WIP - to be scrapped.
MDMCAA0221M MDMCAC0695M MDMCAC0741M MDMCAC0799M
MDMCAA0223M MDMCAC0697M MDMCAC0743M MDMCAC0801M
MDMCAA0225M MDMCAC0699M MDMCAC0745M MDMCAC0803M
MDMCAA0227M MDMCAC0701M MDMCAC0747M MDMCAC0807M
MDMCAA0231M MDMCAC0703M MDMCAC0749M MDMCAC0809M
MDMCAA0233M MDMCAC0705M MDMCAC0751M MDMCAC0811M
MDMCAA0235M MDMCAC0707M MDMCAC0755M MDMCAC0819M
MDMCAA0237M MDMCAC0709M MDMCAC0757M MDMCAI0015M
MDMCAA0239M MDMCAC0711M MDMCAC0761M MDMCAI0021M
MDMCAA0241M MDMCAC0713M MDMCAC0763M MDMCAI0025M
MDMCAA0245M MDMCAC0715M MDMCAC0765M MDMCAl0029M
MDMCAC0615M MDMCAC0717M MDMCAC0769M MDMCAI0033M
MDMCAC0673M MDMCAC0721M MDMCAC0771M MDMCAI0035M
MDMCAC0675M MDMCAC0723M MDMCAC0775M MDMCAI0037M
MDMCAC0677M MDMCAC0725M MDMCAC0777M MDMCAl0045M
MDMCAC0679M MDMCAC0727M MDMCAC0781M MDMCAl0047M
MDMCAC0681M MDMCAC0729M MDMCAC0785M MDMCAl0053M
MDMCAC0685M MDMCAC0731M MDMCAC0787M MDMCAl0055M
MDMCAC0687M MDMCAC0733M MDMCAC0789M MDMCAI0057M
MDMCAC0689M MDMCAC0735M MDMCAC0791M MDMCAI0059M
MDMCAC0691M MDMCAC0737M MDMCAC0795M MDMCAI0061M
MDMCAC0693M MDMCAC0739M MDMCAC0797M -
Main Fitting LH
Serial Number:
Main Fitting LH
Serial Number:
Main Fitting LH
Serial Number:
Main Fitting LH
Serial Number:
Jul 20/2012 (Revision 7)

### Page 7

Appendix A
Service Letter No. A33-34 A20
Page 5
SERVICE LETTER
Messier-Dowty Ltd
AFFECTED SERIAL NUMBERS FOR MAIN LANDING GEAR MAIN FITTING RH PART NUMBERS 
201488325, 201488336, 50-1210001-02, 50-1210001-03 AND 50-2108001-00
TABLE 2
Main Fitting RH
Serial Number:
Main Fitting RH
Serial Number
Main Fitting RH
Serial Number
Main Fitting RH
Serial Number
Section 1: The list of serial numbers of parts that are SUSPECTED to be affected by the 
material specification, including:
- parts with no concession (or for spare parts: not identified in a EASA form 1
or in a FAA Form 8130-3)
- parts for which a defect has been documented.
06MDM00044 (S1) 06MDM00190 (S3) 07MDM00210 (S3) MDMCAC0420M (S3)
06MDM00046 (S1) 06MDM00192 (S3) 07MDM00216 (S3) MDMCAC0422M (S3)
06MDM00048 (S1) 06MDM00204 (S3) 07MDM00218 (S3) MDMCAC0424M (S3)
06MDM00050 (S1) 06MDM00234 (S1) 07MDM00280 (S3) MDMCAC0426M (S3)
06MDM00054 (S1) 06MDM00236 (S1) MD MCAA0114M (S3) MDMCAC0428M (S3)
06MDM00062 (S1) 06MDM00240 (S1) MDMCAA0130M (S3) MDMCAC0430M (S3)
06MDM00064 (S1) 06MDM00246 (S1) MDMCAA0132M (S3) MDMCAC0432M (S3)
06MDM00068 (S1) 06MDM00254 (S1) MDMCAA0138M (S3) MDMCAC0438M (S3)
06MDM00072 (S1) 06MDM00264 (S1) MDMCAA0140M (S3) MDMCAC0440M (S3)
06MDM00078 (S1) 06MDM00266 (S1) MD MCAA0152M (S3) MDMCAC0450M (S3)
06MDM00080 (S1) 06MDM00810 (S1) MD MCAA0154M (S3) MDMCAC0472M (S3)
06MDM00082 (S1) 06MDM00812 (S1) MDMCAA0176M (S3) MDMCAC0484M (S3)
06MDM00088 (S1) 06MDM00818 (S1) MDMCAA0218M (S1) MDMCAC0490M (S3)
06MDM00094 (S1) 06MDM00822 (S1) MDMCAA0224M (S1) MDMCAC0494M (S3)
06MDM00112 (S1) 06MDM00824 (S1) MDMCAA0226M (S1) MDMCAC0516M (S3)
06MDM00114 (S1)* 06MDM00826 (S1) MDMCAC0352M (S3) MDMCAC0568M (S3)
06MDM00126 (S1) 06MDM00830 (S1) MD MCAC0364M (S3) MDMCAC0574M (S3)
06MDM00138 (S1) 06MDM00832 (S1) MDMCAC0366M (S3) MDMCAC0586M (S3)
06MDM00140 (S1) 06MDM00840 (S1) MD MCAC0372M (S3) MDMCAC0604M (S3)
06MDM00146 (S1) 06MDM00860 (S1) MDMCAC0410M (S3) MDMCAC0610M (S3)
06MDM00188 (S3) 07MDM00208 (S3) MDMCAC0418M (S3) MDMCAC0702M (S3)
Jul 20/2012 (Revision 7)

### Page 8

Appendix A
Service Letter No. A33-34 A20
Page 6
SERVICE LETTER
Messier-Dowty Ltd
MDMCAC0740M (S1) MDMCAC0752M (S1) MDMCAC0788M (S1) MDMCAI0014M (S1)
MDMCAC0744M (S1) MDMCAC0754M (S1) MDMCAC0790M(S2C) MDMCAI0020M (S1)
MDMCAC0746M (S1) MDMCAC0758M (S1) MDMCAI0008M (S1) MDMCAI0028M (S1)
MDMCAC0750M (S1) MDMCAC0784M (S1) MDMCAI0010M (S1) -
Main Fitting RH
Serial Number:
Main Fitting RH
Serial Number
Main Fitting RH
Serial Number
Main Fitting RH
Serial Number
Jul 20/2012 (Revision 7)

### Page 9

Appendix A
Service Letter No. A33-34 A20
Page 7
SERVICE LETTER
Messier-Dowty Ltd
Main Fitting RH
Serial Number:
Main Fitting RH
Serial Number
Main Fitting RH
Serial Number
Main Fitting RH
Serial Number
Section 2: The list of serial numbers of parts that are NO LONGER SUSPECTED to be 
affected by the material specification, including:
- parts delivered with a concession (or for spare parts: identified either in a
EASA form 1 or in a FAA Form 8130-3)
- parts previously listed in the SL A20.
06MDM00042 06MDM00130 06MDM00194 06MDM00834
06MDM00052 06MDM00132 06MDM00198 06MDM00836
06MDM00056 06MDM00136 06MDM00200 06MDM00838
06MDM00058 06MDM00142 06MDM00202 06MDM00842
06MDM00060 06MDM00144 06MDM00232 06MDM00848
06MDM00066 06MDM00148 06MDM00238 06MDM00850
06MDM00074 06MDM00150 06MDM00242 06MDM00852
06MDM00076 06MDM00152 06MDM00244 06MDM00856
06MDM00084 06MDM00154 06MDM00248 06MDM00858
06MDM00086 06MDM00156 06MDM00250 06MDM00862
06MDM00090 06MDM00158 06MDM00252 06MDM00870
06MDM00092 06MDM00160 06MDM00256 06MDM00872
06MDM00096 06MDM00162 06MDM00258 06MDM00874
06MDM00098 06MDM00164 06MDM00262 07MDM00206
06MDM00100 06MDM00166 06MDM00268 07MDM00220
06MDM00102 06MDM00168 06MDM00272 07MDM00222
06MDM00104 06MDM00170 06MDM00274 07MDM00224
06MDM00108 06MDM00172 06MDM00278 07MDM00226
06MDM00110 06MDM00174 06MDM00804 07MDM00228
06MDM00116 06MDM00176 06MDM00806 07MDM00230
06MDM00118 06MDM00178 06MDM00808 07MDM00232
06MDM00120 06MDM00180 06MDM00814 07MDM00234
06MDM00122 06MDM00182 06MDM00816 07MDM00238
06MDM00124 06MDM00184 06MDM00820 07MDM00240
06MDM00128 06MDM00186 06MDM00828 07MDM00242
Jul 20/2012 (Revision 7)

### Page 10

Appendix A
Service Letter No. A33-34 A20
Page 8
SERVICE LETTER
Messier-Dowty Ltd
07MDM00244 MDMCAA0212M MDMCAC0696M MDMCAC0772M
07MDM00246 MDMCAA0214M MDMCAC0698M MDMCAC0774M
07MDM00248 MDMCAA0216M MDMCAC0700M MDMCAC0776M
07MDM00252 MDMCAA0220M MDMCAC0704M MDMCAC0778M
07MDM00254 MDMCAA0222M MDMCAC0706M MDMCAC0780M
07MDM00256 MDMCAA0228M MDMCAC0708M MDMCAC0782M
07MDM00260 MDMCAC0492M MDMCAC0710M MDMCAC0786M
07MDM00262 MDMCAC0650M MDMCAC0712M MDMCAC0792M
07MDM00264 MDMCAC0654M MDMCAC0714M MDMCAC0794M
07MDM00266 MDMCAC0656M MDMCAC0716M MDMCAC0796M
07MDM00284 MDMCAC0658M MDMCAC0718M MDMCAC0798M
07MDM00870 MDMCAC0660M MDMCAC0720M MDMCAC0800M
07MDM00872 MDMCAC0662M MDMCAC0722M MDMCAC0802M
07MDM00874 MDMCAC0664M MDMCAC0724M MDMCAI0006M
07MDM00876 MDMCAC0666M MDMCAC0726M MDMCAl0012M
MDMCAA0166M MDMCAC0668M MDMCAC0728M MDMCAl0016M
MDMCAA0186M MDMCAC0670M MDMCAC0730M MDMCAI0018M
MDMCAA0188M MDMCAC0672M MDMCAC0732M MDMCAI0022M
MDMCAA0190M MDMCAC0674M MDMCAC0734M MDMCAl0024M
MDMCAA0192M MDMCAC0676M MDMCAC0736M MDMCAI0026M
MDMCAA0194M MDMCAC0678M MDMCAC0738M MDMCAl0030M
MDMCAA0196M MDMCAC0680M MDMCAC0742M MDMCAI0032M
MDMCAA0198M MDMCAC0682M MDMCAC0748M MDMCAI0034M
MDMCAA0200M MDMCAC0684M MDMCAC0756M MDMCAI0036M
MDMCAA0202M MDMCAC0686M MDMCAC0762M MDMCAI0038M
MDMCAA0204M MDMCAC0688M MDMCAC0764M MDMCAI0040M
MDMCAA0206M MDMCAC0690M MDMCAC0766M -
MDMCAA0208M MDMCAC0692M MDMCAC0768M -
MDMCAA0210M MDMCAC0694M MDMCAC0770M -
Main Fitting RH
Serial Number:
Main Fitting RH
Serial Number
Main Fitting RH
Serial Number
Main Fitting RH
Serial Number
Jul 20/2012 (Revision 7)

### Page 11

Appendix A
Service Letter No. A33-34 A20
Page 9
SERVICE LETTER
Messier-Dowty Ltd
NOTE : Please refer to OIT SE 999.0012/07/LB Rev. 04 dated 05 May 08 and TFU Ref:
32.00.00.012, for information regarding (S1), (S2C) and (S3) in the above Table 2,
Section 1.
NOTE : If Messier-Dowty Limited Service Bulletin A33/34-32-257 has been done to the main
fitting part number 201488325, the new main fitting part number will be 201488336,
while keeping the same serial number.
NOTE : * Production part listed as quarantine or WIP - to be scrapped.
Jul 20/2012 (Revision 7)

### Page 12

INTENTIONALLY BLANK
Appendix A
Service Letter No. A33-34 A20
Page 10
SERVICE LETTER
Messier-Dowty Ltd

### Page 13

Appendix B
Service Letter No. A33-34 A20
Page 1 of 4
CAGE: K0654
Cheltenham Road, Gloucester, GL2 9QH, England
Telephone: +44 (0) 1452 712424 Fax: +44 (0) 1452 713821
SERVICE LETTER
Messier-Dowty Ltd
 ©MESSIER-BUGATTI-DOWTY 2012 (AND SUBSEQUENT REVISION PAGE DATES)
This document and all information contained herein is the sole property of Messier-Bugatti-Dowty. No intellectual property righ ts are
granted by the delivery of this document or the disclosure of its content. This document shall not be reproduced to a third party without the
express written consent of Messier-Bugatti-Dowty.
Safran and Messier-Bugatti names are marks owned respectively by  Safran and Messier-Bugatti-Dowty companies. The mark Dowty is
used under licence.
APPENDIX B
AFFECTED SERIAL NUMBERS FOR MAIN LANDING GEAR BOGIE BEAMS 201272304, 
50-1217001-01, 50-1217001-04, 50-2117002-00, 201272307 AND 50-2117002-01
TABLE 1
Bogie Beam
Serial Number:
Bogie Beam
Serial Number:
Bogie Beam
Serial Number:
Bogie Beam
Serial Number:
Section 1: The list of serial numbers of parts that are SUSPECTED to be affected by the 
material specification, including:
- parts with no concession (or for spare parts: not identified in a EASA form
1 or in a FAA Form 8130-3)
- parts for which a defect has been documented.
06MDG2600 (S2B) 06MDG2837 (S2A) 06M DG4769 (S2A) 06MDG5837 (S2B)
06MDG2601 (S2A) 06MDG2838 (S2A) 06M DG4770 (S2A) 06MDG5838 (S2B)
06MDG2602 (S2A) 06MDG2839 (S2A) 06M DG4776 (S2A) 06MDG5839 (S2B)
06MDG2603 (S2A) 06MDG2840 (S2A) 06M DG4777 (S2A) 06MDG5840 (S2B)
06MDG2604 (S2A) 06MDG2841 (S2A) 06M DG4778 (S2A) 06MDG5841 (S2B)
06MDG2605 (S2A) 06MDG2850 (S2A) 06M DG4947 (S2C) 06MDG5842 (S2A)
06MDG2805 (S2C) 06MDG2851 (S2C) 06MDG4948 (S2C) 06MDG5843 (S2A)
06MDG2806 (S2A) 06MDG2852 (S2A) 06MDG4949 (S2A) 06MDG5844 (S2B)
06MDG2807 (S2A) 06MDG2853 (S2A) 06M DG4950 (S2A) 06MDG5845 (S2B)
06MDG2808 (S2A) 06MDG2897 (S2C) 06M DG4951 (S2A) 06MDG5846 (S2B)
06MDG2809 (S2A) 06MDG2898 (S2C) 06MDG4952 (S2A) 06MDG5847 (S2A)
06MDG2810 (S2A) 06MDG2899 (S2B) 06MDG4953 (S2B) 06MDG5848 (S2A)
06MDG2811 (S2A) 06MDG2900 (S2B) 06M DG4954 (S2B) 06MDG5849 (S2A)
06MDG2832 (S2C) 06MDG2903 (S2A) 06MDG4955 (S2A) 06MDG5850 (S2A)
06MDG2833 (S2C) 06MDG2904 (S2C) 06M DG4956 (S2A) 06MDG10434 (S2A)
06MDG2834 (S2A) 06MDG2906 (S2B) 06M DG5834 (S2B) 06MDG10435 (S2A)
Jul 20/2012 (Revision 7)

### Page 14

Appendix B
Service Letter No. A33-34 A20
Page 2
SERVICE LETTER
Messier-Dowty Ltd
06MDG2835 (S2A) 06MDG2907 (S2B) 06MDG5835 (S2B) 06MDG10436 (S2A)
06MDG2836 (S2A) 06MDG2908 (S2A) 06M DG5836 (S2B) 06MDG10437 (S2A)
06MDG10438 (S2A) 06MDG14351 (S2A) 06MDG15893 (S2C)* 07MDG3540 (S2B)
06MDG10439 (S2A) 06MDG14352 (S2A) 06MDG15894 (S2A) 07MDG3541 (S2B)
06MDG10440 (S2A) 06MDG14353 (S2A) 06MDG15895 (S2A) 07MDG3542 (S2B)
06MDG10441 (S2A) 06MDG14354 (S2A) 06MDG15896 (S2A) 07MDG3543 (S2B)
06MDG10442 (S2A) 06MDG14355 (S2C) 06MDG15897 (S2A) 07MDG3545 (S2B)
06MDG10443 (S2A) 06MDG14356 (S2C) 06MDG15898 (S2A) 07MDG3546 (S2B)
06MDG10538 (S2A) 06MDG14415 (S2C) 07MDG1179 (S2A) 07MDG3547 (S2B)
06MDG10539 (S2A) 06MDG14416 (S2C) 07MDG1180 (S2A) 07MDG3662 (S2A)
06MDG10548 (S2A) 06MDG14417 (S2A) 07MDG1181 (S2A) 07MDG3663 (S2B)
06MDG10549 (S2A) 06MDG14418 (S2A) 07MDG1182 (S2A) 07MDG3664 (S2B)
06MDG12158 (S2A) 06MDG14419 (S2C) 07MDG1183 (S2A) 07MDG3665 (S2B)
06MDG12159 (S2A) 06MDG14420 (S2C) 07MDG1184 (S2A) 07MDG3666 (S2B)
06MDG12174 (S2A) 06MDG15548 (S2A) 07MDG1185 (S2A) 07MDG3667 (S2B)
06MDG12175 (S2B) 06MDG15549 (S2A) 07MDG1186 (S2A) 07MDG3668 (S2B)
06MDG12177 (S2A) 06MDG15789 (S2A) 07MDG1187 (S2A) 07MDG3669 (S2A)
06MDG12178 (S2A) 06MDG15790 (S2A) 07MDG1188 (S2A) 07MDG3671 (S2B)
06MDG12179 (S2A) 06MDG15791 (S2A) 07MDG1189 (S2A) 07MDG6041 (S2B)
06MDG13934 (S2B) 06MDG15792 (S2A) 07MDG1190 (S2A) 07MDG6042 (S2B)
06MDG13935 (S2B) 06MDG15793 (S2A) 07MDG1191 (S2A) 07MDG6043 (S2B)
06MDG13938 (S2B) 06MDG15794 (S2A) 07MDG1192 (S2A) 07MDG6044 (S2B)
06MDG13939 (S2B) 06MDG15795 (S2C) 07MDG1193 (S2A) 07MDG6045 (S2B)
06MDG13940 (S2B) 06MDG15796 (S2C) 07MDG1194 (S2A) 07MDG6046 (S2B)
06MDG13941 (S2A) 06MDG15797 (S2A) 07MDG1195 (S2A) 07MDG6047 (S2B)
06MDG13942 (S2A) 06MDG15798 (S2A) 07MDG1196 (S2A) 07MDG6048 (S2A)
06MDG14032 (S2B) 06MDG15890 (S2A) 07MDG3537 (S2A) 07MDG6049 (S2A)
Bogie Beam
Serial Number:
Bogie Beam
Serial Number:
Bogie Beam
Serial Number:
Bogie Beam
Serial Number:
Jul 20/2012 (Revision 7)

### Page 15

Appendix B
Service Letter No. A33-34 A20
Page 3
SERVICE LETTER
Messier-Dowty Ltd
06MDG14033 (S2A) 06MDG15891 (S2A) 07M DG3538 (S2B) 07MDG6050 (S2A)
06MDG14034 (S2A) 06MDG15892 (S2B) 07M DG3539 (S2B) 07MDG6051 (S2A)
07MDG6052 (S2A) 12036/05 (S2A) 8095/05 (S2A) 8289/05 (S2A)
07MDG6053 (S2B) 12037/05 (S2A) 8096/05 (S2A) 8290/05 (S2A)
07MDG6952 (S2A) 12243/05 (S2A) 8097/05 (S2A) 8291/05 (S2A)
07MDG6953 (S2A)* 12244/05 (S2A) 8098/05 (S2A) 8292/05 (S2A)
07MDG6954 (S2A) 12245/05 (S2A) 8099/05 (S2A) 8293/05 (S2A)
07MDG6955 (S2A) 12246/05 (S2A) 8100/05 (S2A) 8294/05 (S2A)
07MDG6957 (S2B) 12447/05 (S2A) 8209/05 (S2B) 8295/05 (S2A)
07MDG6958 (S2B) 12448/05 (S2A) 8210/05 (S2B) 9625/05 (S2A)
07MDG6959 (S2B) 12449/05 (S2C) 8211/05 (S2A) 9626/05 (S2A)
07MDG6960 (S2B) 12450/05 (S2C) 8212/05 (S2A) 9627/05 (S2A)
07MDG7077 (S2A) 13951/05 (S2C) 8213/05 (S2A) 9628/05 (S2A)
07MDG7078 (S2A) 13952/05 (S2C) 8214/05 (S2A) 9629/05 (S2A)
07MDG7079 (S2A) 14906/05 (S2A) 8280/05 (S2A) 9630/05 (S2A)
07MDG7080 (S2A) 14908/05 (S2A) 8281/05 (S2A) 9873/05 (S2A)
07MDG7081 (S2B) 14909/05 (S2A) 8282/05 (S2A) 9874/05 (S2A)
07MDG7082 (S2B) 14910/05 (S2A)* 8283/05 (S2A) 9875/05 (S2A)
07MDG7083 (S2B) 14911/05 (S2A) 8284/05 (S2A) 9876/05 (S2A)
07MDG7084 (S2B) 14912/05 (S2A) 8285/05 (S2B) 9877/05 (S2A)
12029/05 (S2A) 3899/05 (S2B) 8286/05 (S2B) 9878/05 (S2A)
12030/05 (S2B) 3900/05 (S2B) 8287/05 (S2A) -
12035/05 (S2A) 8094/05 (S2A) 8288/05 (S2A) -
Bogie Beam
Serial Number:
Bogie Beam
Serial Number:
Bogie Beam
Serial Number:
Bogie Beam
Serial Number:
Jul 20/2012 (Revision 7)

### Page 16

Appendix B
Service Letter No. A33-34 A20
Page 4
SERVICE LETTER
Messier-Dowty Ltd
AFFECTED SERIAL NUMBERS FOR MAIN LANDING GEAR BOGIE BEAMS 201272304, 
50-1217001-01, 50-1217001-04, 50-2117002-00, 201272307 AND 50-2117002-01
NOTE : Please refer to OIT SE 999.0012/07/LB Rev. 04 dated 05 May 08 and TFU Ref:
32.00.00.012, for information regarding (S2A), (S2B) and (S2C) in the above Table 1,
Section 1.
NOTE : All bogie part numbers 50-1217001-01 in the above list were delivered from
Messier-Dowty Ltd prior to introduction of the -04 evolution. The lives for the
specific parts detailed above is the same whether they are -01 or -04 parts.
Retrospective embodiment of A34/56M-32-25 on these bogies by re-part
numbering the bogie with part number 50-1217001-04, whilst retaining the same
serial number, will allow operators to claim the revised -04 life, with no physical
change. However, the component will still be subject to the same reduced life
limitations due to having been manufactured from MTL1201 material suspected of
having deficient fatigue properties. For these specific -01 parts therefore, the life is
the same as for the affected -04 parts.
NOTE : * Production part listed as quarantine or WIP - to be scrapped.
Bogie Beam
Serial Number:
Bogie Beam
Serial Number
Bogie Beam
Serial Number
Bogie Beam
Serial Number
Section 2: The list of serial numbers of parts that are NO LONGER SUSPECTED to be 
affected by the material specification, including:
- parts delivered with a concession (or for spare parts: identified either in a
EASA form 1 or in a FAA Form 8130-3)
- parts previously listed in the SL A20.
06MDG10550 – – –
Jul 20/2012 (Revision 7)

### Page 17

Appendix C
Service Letter No. A33-34 A20
Page 1 of 2
CAGE: K0654
Cheltenham Road, Gloucester, GL2 9QH, England
Telephone: +44 (0) 1452 712424 Fax: +44 (0) 1452 713821
SERVICE LETTER
Messier-Dowty Ltd
 ©MESSIER-BUGATTI-DOWTY 2012 (AND SUBSEQUENT REVISION PAGE DATES)
This document and all information contained herein is the sole property of Messier-Bugatti-Dowty. No intellectual property righ ts are
granted by the delivery of this document or the disclosure of its content. This document shall not be reproduced to a third party without the
express written consent of Messier-Bugatti-Dowty.
Safran and Messier-Bugatti names are marks owned respectively by  Safran and Messier-Bugatti-Dowty companies. The mark Dowty is
used under licence.
APPENDIX C
AFFECTED SERIAL NUMBERS FOR CENTER LANDING GEAR MAIN FITTING PART NUMBERS 
50-1105296-00, 50-1105326-00 AND 50-1105236-01.
TABLE 1 
Main Fitting 
Serial Number:
Main Fitting
Serial Number:
Main Fitting
Serial Number:
Main Fitting
Serial Number:
Section 1: The list of serial numbers of parts that are SUSPECTED to be affected by the 
material specification, including:
- parts with no concession (or for spare parts: not identified in a EASA form
1 or in a FAA Form 8130-3)
- parts for which a defect has been documented.
06MDM00021 (S1) 07MDM00035 (S3) MDMCBA0082M (S3) MDMCBA0120M (S3)
06MDM00022 (S3) 07MDM00036 (S3) MDMCBA0098M (S3) MDMCBA0121M (S3)
06MDM00023 (S3) 07MDM00037 (S3) MDMCBA0099M (S3) MDMCBA0137M (S1)
06MDM00024 (S3) 07MDM00038 (S3) MDMCBA0100M (S3) MDMCBA0138M (S1)
06MDM00025 (S3) 07MDM0041 (S3) MDMCBA0101M (S3) MDMCBA0139M (S1)
06MDM00026 (S3) 07MDM0042 (S3) MDMCBA0105M (S3) MDMCBA0140M (S1)
06MDM00027(S3) MDMCBA0052M (S3) MDMCBA0106M (S3) MDMCBJ0007M (S2C)
06MDM00028 (S3) MDMCBA0053M (S3) MDMCBA0107M (S3) MDMCBJ0008M (S2C)
06MDM00029 (S3) MDMCBA0055M (S3) MDMCBA0110M (S3) -
06MDM00030 (S3) MDMCBA0056M (S3) MDMCBA0111M (S3) -
06MDM00031 (S3) MDMCBA0057M (S3) MDMCBA0114M (S3) -
06MDM00032 (S3) MDMCBA0058M (S3) MDMCBA0115M (S3) -
07MDM00033 (S3) MDMCBA0059M (S3) MDMCBA0118M (S3) -
07MDM00034 (S3) MDMCBA0079M (S3) MDMCBA0119M (S3) -
Jul 20/2012 (Revision 7)

### Page 18

Appendix C
Service Letter No. A33-34 A20
Page 2
SERVICE LETTER
Messier-Dowty Ltd
 
NOTE : Please refer to OIT SE 999.0012/07/LB Rev. 04 dated 05 May 08 and TFU Ref:
32.00.00.012, for information regarding (S1), (S2C) and (S3) in the above Table 1,
Section 1.
Main Fitting 
Serial Number:
Main Fitting
Serial Number:
Main Fitting
Serial Number:
Main Fitting
Serial Number:
Section 2: The list of serial numbers of parts that are NO LONGER SUSPECTED to be 
affected by the material specification, including:
- parts delivered with a concession (or for spare parts: identified either in a
EASA form 1 or in a FAA Form 8130-3)
- parts previously listed in the SL A20.
06MDM00011 06MDM00017 MDMCBA0129M MDMCBA0136M
06MDM00012 06MDM00018 MDMCBA0130M MDMCBJ0004M
06MDM00013 06MDM00019 MDMCBA0133M MDMCBJ0006M
06MDM00014 06MDM00020 MDMCBA0134M MDMCBJ0009M
06MDM00015 MDMCBA0128M MDMCBA0135M MDMCBJ0010M
Jul 20/2012 (Revision 7)

### Page 19

Appendix D
Service Letter No. A33-34 A20
Page 1 of 2
CAGE: K0654
Cheltenham Road, Gloucester, GL2 9QH, England
Telephone: +44 (0) 1452 712424 Fax: +44 (0) 1452 713821
SERVICE LETTER
Messier-Dowty Ltd
 ©MESSIER-BUGATTI-DOWTY 2012 (AND SUBSEQUENT REVISION PAGE DATES)
This document and all information contained herein is the sole property of Messier-Bugatti-Dowty. No intellectual property righ ts are
granted by the delivery of this document or the disclosure of its content. This document shall not be reproduced to a third party without the
express written consent of Messier-Bugatti-Dowty.
Safran and Messier-Bugatti names are marks owned respectively by  Safran and Messier-Bugatti-Dowty companies. The mark Dowty is
used under licence.
APPENDIX D
AFFECTED SERIAL NUMBERS FOR MAIN LANDING GEAR SLIDING PISTON PART NUMBER
50-2109001-01, 201487307 AND 201487309.
TABLE 1
NOTE : Please refer to OIT SE 999.0012/07/LB Rev. 04 dated 05 May 08 and TFU Ref:
32.00.00.012, for information regarding (S1) in the above Table 1, Section 1.
NOTE : If Messier-Dowty Limited Service Bulletin A33/34-32-233 or A33/34-32-234 has been
done to the sliding piston part number 201487307, the new sliding piston part
number will be 201487309, while keeping the same serial number.
Sliding Piston
Serial Number:
Sliding Piston
Serial Number:
Sliding Piston
Serial Number:
Sliding Piston
Serial Number:
Section 1: The list of serial numbers of parts that are SUSPECTED to be affected by the 
material specification, including:
- parts with no concession (or for spare parts: not identified in a EASA form
1 or in a FAA Form 8130-3)
- parts for which a defect has been documented.
07B0694X1455 (S1) 07B0697X1459 (S1) B0046-292 (S1) -
07B0695X1456 (S1) 07B0698X1460 (S1) B0047-300 (S1) -
07B0696X1457 (S1) B0045-290 (S1) B0048-302 (S1) -
Jul 20/2012 (Revision 7)

### Page 20

INTENTIONALLY BLANK
Appendix D
Service Letter No. A33-34 A20
Page 2
SERVICE LETTER
Messier-Dowty Ltd

### Page 21

Appendix E
Service Letter No. A33-34 A20
Page 1 of 4
CAGE: K0654
Cheltenham Road, Gloucester, GL2 9QH, England
Telephone: +44 (0) 1452 712424 Fax: +44 (0) 1452 713821
SERVICE LETTER
Messier-Dowty Ltd
 ©MESSIER-BUGATTI-DOWTY 2012 (AND SUBSEQUENT REVISION PAGE DATES)
This document and all information contained herein is the sole property of Messier-Bugatti-Dowty. No intellectual property righ ts are
granted by the delivery of this document or the disclosure of its content. This document shall not be reproduced to a third party without the
express written consent of Messier-Bugatti-Dowty.
Safran and Messier-Bugatti names are marks owned respectively by  Safran and Messier-Bugatti-Dowty companies. The mark Dowty is
used under licence.
APPENDIX E
Material
Messier-Dowty Ltd will provide main landing gea r main fittings, bogie beams, sliding pistons and
center landing gear main fittings at planned maintenance opportunities to support the replacement
of affected components prior to the drop-dead date where the life is exhausted prior to overhaul.
Your regional Messier-Dowty Ltd Customer Se rvice Manager will provide the part number and
serial number of the material to be replaced, and details of the new replacement items.
Main Landing Gear – Main Fittings
To support MLG main fitting interventions details  of replacement material to be ordered are as
follows:
MLG Main Fitting
Series Detail P/N Procurable P/N Consumable Kit No.
201252 201488324 201488255 201588MFK1T1
201252 201488325 201488256 201588MFK1T1
201490 201488324 201488277 201488MFK1T1
201490 201488325 201488278 201488MFK1T1
10-21 50-2107001-00 30-2107001-00 81-2101001-00
10-21 50-2108001-00 30-2108001-00 81-2101001-00
10-12 50-1209001-03 30-1209001-03 81-1201005-00
10-12 50-1210001-03 30-1210001-03 81-1201005-00
Jul 20/2012 (Revision 7)

### Page 22

Appendix E
Service Letter No. A33-34 A20
Page 2
SERVICE LETTER
Messier-Dowty Ltd
Attrition Spares
It is recognised that some components within the MLG that are not considered 100 percent
replacements may be required due to unfores een circumstances. Messier-Dowty Ltd will place at
strategic locations sufficient parts to support in terventions that are to be undertaken in that
geographic region. The list of components will include:
Where required replacement parts will be confirmed by the Messier-Dowty Ltd Working Party Team
Leader, ordered by the operator and shipped on the next available flight to the required location.
Main Landing Gear – Bogie Beams
To support MLG bogie beam interventions details of replacement material to be ordered are as
follows:
Main Landing Gear – Sliding Piston
To support MLG sliding piston inte rventions details of replacement material to be ordered are as
follows:
Bell Crank Bogie Pivot Pin
SM2 Pin SM8/SM9 Pins
Lower Bearing Stop Pads
Upper Bearing COV (spare seal)
MLG Bogie Beam
Detail P/N Procurable P/N Consumable Kit No.
201272304
201272307
201272235
201272245
201272B0GK1T1
50-2117002-00
50-2117002-01
30-2117002-00
30-2117004-01
81-2111002-00
50-1217001-04 30-1217001-06 81-1211001-00
MLG Sliding Piston
Detail P/N Procurable P/N Consumable Kit No.
50-2109001-01 30-2109001-01 81-1101103-00
201487307 201487216 201487SL1DK1T1
201487309 201487219 201487SL1DK1T1
Jul 20/2012 (Revision 7)

### Page 23

Appendix E
Service Letter No. A33-34 A20
Page 3
SERVICE LETTER
Messier-Dowty Ltd
Centre Landing Gear – Main Fitting
To support CLG main fitting interventions details of  replacement material to be ordered are as
follows:
Working Party Support
Where the component needs to be replaced prior to first overhaul, Messier-Dowty Ltd will support
the first change-out of affected components with a free of charge service engineer team. At this
time Messier-Dowty Ltd offer training to the o perator’s maintenance provider to enable them to
support subsequent interventions themselves.
CLG Main Fitting
Detail P/N Procurable P/N Seal Kit No. Consumable Kit No.
50-1105296-00 30-1105296-01 81-1101034-02 81-1105450-00
50-1105326-00 30-1105326-00 81-1101101-00 81-1101102-00
Jul 20/2012 (Revision 7)

### Page 24

INTENTIONALLY BLANK
Appendix E
Service Letter No. A33-34 A20
Page 4
SERVICE LETTER
Messier-Dowty Ltd

### Page 25

Appendix F
Service Letter No. A33-34 A20
Page 1 of 2
CAGE: K0654
Cheltenham Road, Gloucester, GL2 9QH, England
Telephone: +44 (0) 1452 712424 Fax: +44 (0) 1452 713821
SERVICE LETTER
Messier-Dowty Ltd
 ©MESSIER-BUGATTI-DOWTY 2012 (AND SUBSEQUENT REVISION PAGE DATES)
This document and all information contained herein is the sole property of Messier-Bugatti-Dowty. No intellectual property righ ts are
granted by the delivery of this document or the disclosure of its content. This document shall not be reproduced to a third party without the
express written consent of Messier-Bugatti-Dowty.
Safran and Messier-Bugatti names are marks owned respectively by  Safran and Messier-Bugatti-Dowty companies. The mark Dowty is
used under licence.
APPENDIX F
PERMANENT DISPOSAL OF SCRAP AIRCRAFT PARTS AND MATERIALS
1. Mutilation of Parts and Materials
A. Scrap aircraft parts and materials which will no longer be used are to be permanently disposed
of. The parts should be mutilated so that they cannot be re-used for their original intended use.
The mutilation should be sufficient to make sure that parts cannot be repaired or camouflaged
to give the appearance of acceptable parts. To effectively mutilate parts or materials you
should:
(1) remove major lugs or other integral features
(2) permanently distort the part
(3) cut holes into the part with a saw
(4) saw parts into many small pieces
B.  The list which follows is not consi dered as effective methods of mutilation:
(1) stamp or mark the word ‘SCRAP’ on the part
(2) spray the part with paint
(3) hammer marks on the part
(4) Identification tags or marks
(5) drilling small holes in the parts
(6) sawing in two pieces.
C. After successful mutilation of a part or parts, complete a copy of the pro-forma shown on page
2 of this Appendix F with the required information and forward it to:
The Retrofit Team
Messier-Dowty Limited
Cheltenham Road
Gloucester
GL2 9QH
England
Fax: + 44 01452 711972.
email: pseglostec@safranmbd.com
Jul 20/2012 (Revision 7)

### Page 26

Appendix F
Service Letter No. A33-34 A20
Page 2
SERVICE LETTER
Messier-Dowty Ltd
Permanent Disposal of Scrap Aircraft Parts and Materials - Pro-Forma
Hand of Unit removed from: Left/Right/Not applicable (please tick)
Component(s) removed from MSN: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
I, the undersigned, confirm that the above referenced part(s) has/have been removed from 
useful service and that the part(s) has/have been successfully mutilated in accordance with 
the advice given (Messier-Dowty Limited Service Letter A33-34 A20, Appendix E refers). 
I also confirm that the part(s) has/have been properly disposed of as scrap.
PERMANENT DISPOSAL OF SCRAP AIRCRAFT PARTS AND MATERIALS       
Additional information or comments:
Signed: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Dated: _ _ _ _/_ _ _ _/_ _ _ _ _ _ _
For and on Behalf of: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
 Aircraft Type:  _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
Description of Part(s): _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
 Part Number(s): _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Serial Number(s): _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
Date of Destruction: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _  
Jul 20/2012 (Revision 7)

### Page 27

Page 1 of 2
CAGE: K0654
Cheltenham Road, Gloucester, GL2 9QH, England
Telephone: +44 (0) 1452 712424 Fax: +44 (0) 1452 713821
SERVICE LETTER
Messier-Dowty Ltd
 ©MESSIER-BUGATTI-DOWTY 2012 (AND SUBSEQUENT REVISION PAGE DATES)
This document and all information contained herein is the sole property of Messier-Bugatti-Dowty. No intellectual property righ ts are
granted by the delivery of this document or the disclosure of its content. This document shall not be reproduced to a third party without the
express written consent of Messier-Bugatti-Dowty.
Safran and Messier-Bugatti names are marks owned respectively by  Safran and Messier-Bugatti-Dowty companies. The mark Dowty is
used under licence.
AIRBUS A330/A340 MAIN LANDING GEAR
SERVICE LETTER A33-34 A20
TRANSMITTAL LETTER FOR REVISION 7
DATE JUL 20/2012
1. REASON
A. To update company name to Messier-Dowty Ltd.
2. ACTION
A. Remove and destroy existing pages 1 and 2 dated Jun 11/2012 (Revision 6) and substitute
revised pages 1 and 2 dated Jul 20/2012 (Revision 7).
B. Appendix A. Remove and destroy existing pages 1 to 10 dated Jun 11/2012 (Revision 6) and
substitute the revised pages 1 to 10 dated Jul 20/2012 (Revision 7).
C. Appendix B. Remove and destroy existing pages 1 and 4 dated Jun 11/2012 (Revision 6) and
substitute the revised pages 1 to 4 dated Jul 20/2012 (Revision 7).
D. Appendix C. Remove and destroy existing pages 1 and 2 dated Jun 11/2012 (Revision 6) and
substitute the revised pages 1 and 2 dated Jul 20/2012 (Revision 7).
E. Appendix D. Remove and destroy existing pages 1 and 2 dated Jun 11/2012 (Revision 6) and
substitute the revised pages 1 and 2 dated Jul 20/2012 (Revision 7).
F. Appendix E. Remove and destroy existing pages 1 and 2 dated Jun 11/2012 (Revision 6) and
substitute the revised pages 1 to 4 dated Jul 20/2012 (Revision 7).
G. Appendix F. Remove and destroy existing pages 1 and 2 dated Jun 11/2012 (Revision 6) and
substitute the revised pages 1 and 2 dated Jul 20/2012 (Revision 7).

### Page 28

Page 2
SERVICE LETTER
Messier-Dowty Ltd
AIRBUS A330/A340 MAIN LANDING GEAR
SERVICE LETTER A33-34 A20
TRANSMITTAL LETTER FOR REVISION 7 (CONTINUED)
DATE JUL 20/2012
3. PREVIOUS REVISION/ISSUE DETAILS
Revision Status Date
A. Initial Issue Mar 13/2007
B. Revision 1 Sep 14/2007
C. Revision 2 Apr 28/2008
D. Revision 3 Jun 27/2008
E. Revision 4 Oct 10/2008
F. Revision 5 Jul 31/2009
G. Revision 6 Jun 11/2012

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain, except the copies of manufacturers’ service documents, which belong to their rights holders.