631-32-214

Inovel Parc Sud 78140 Vélizy-Villacoublay Tél. +33 (0)1 46 29 18 00 Fax +33 (0)1 46 29 18 01 

# SERVICE BULLETIN

January 13, 2014 Service Bulletin N° 631-32-214 Page 1 of 15 ATR 72 MAIN LANDING GEAR PINS INSPECTION

1. PLANNING INFORMATION

A. Effectivity

(1) In-service aircraft affected

ATR 72 all types.

(2) In-service and spare components affected:

Pins of MLG legs D23189000 (LH) and D23190000 (RH) all modification suffixes, side brace and shock absorber in spare D23188000 all modification suffixes listed hereafter.

Pins D60955, D60968, or D60968-1, or D 60968-2, D60999, D61032 and D61061 listed in the following table.

(3) Parts concerned by the present Special Insp ection: pins listed in the following table:

a) That have been previously inspected by SPRO as per Service Bulletin 631-32-125 and 631-32-126 in the frame of the DGAC Airw orthiness Directive (AD) 1996-096-29 (B)

b) For operator which cannot determine whic h MRO has accomplished the inspection as per MESSIER-BUGATTI-DOWTY Service Bu lletin 631-32-125 and 631-32-126 in the frame of the DGAC AD 1996-096-029 (B).631-32-214 

# SERVICE BULLETIN

January 13, 2014 Service Bulletin N° 631-32-214 Page 2 of 10 PIN PIN PIN PIN PIN D61032 D60968 D60955 D60999 D61061

S/N S/N S/N S/N S/N

MN1 MN2 MN 1 MN1 MN1 MN2 MN3 MN 2 MN6 MN2 MN3 MN5 MN 8 MN7 MN5 MN4 MN8 MN 9 MN9 MN6 MN5 MN9 MN11 MN11 MN7 MN6 MN11 MN12 MN12 MN8 MN7 MN12 MN13 MN13 MN9 MN8 MN13 MN14 MN14 MN10 MN12 MN14 MN15 MN15 MN11 MN13 MN15 MN16 MN16 MN12 MN14 MN16 MN17 MN17 MN13 MN15 MN17 MN18 MN18 MN14 MN16 MN18 MN19 MN19 MN15 MN17 MN19 MN20 MN20 MN17 MN18 MN21 MN21 MN21 MN18 MN19 MN23 MN22 MN22 MN19 MN20 MN24 MN23 MN23 MN20 MN22 MN25 MN24 MN24 MN22 MN23 MN26 MN26 MN25 MN23 MN25 MN28 MN27 MN26 MN24 MN26 MN29 MN28 MN27 MN25 MN27 MN30 MN29 MN28 MN26 MN28 MN31 MN31 MN29 MN27 MN29 MN32 MN33 MN30 MN28 MN30 MN33 MN34 MN31 MN30 MN31 MN34 MN35 MN32 MN31 MN33 MN35 MN36 MN33 MN32 MN34 MN36 MN37 MN34 MN33 MN35 MN37 MN39 MN35 MN34 MN36 MN38 MN40 MN36 MN35 MN37 MN39 MN41 MN37 MN36 MN39 MN40 MN42 MN38 MN37 MN40 MN41 MN43 MN39 MN38 MN41 MN42 MN44 MN40 MN39 MN42 MN43 MN45 MN41 MN40 MN43 MN44 MN46 MN42 MN41 MN44 MN45 MN47 MN43 MN42 MN45 MN46 MN48 MN44 MN43631-32-214



# SERVICE BULLETIN

January 13, 2014 Service Bulletin N° 631-32-214 Page 3 of 15 PIN PIN PIN PIN PIN D61032 D60968 D60955 D60999 D61061

S/N S/N S/N S/N S/N MN46 MN47 MN49 MN45 MN44 MN47 MN48 MN51 MN46 MN45 MN48 MN49 MN52 MN47 MN46 MN49 MN50 MN53 MN48 MN47 MN50 MN51 MN55 MN49 MN48 MN51 MN52 MN56 MN50 MN49 MN52 MN53 MN57 MN51 MN50 MN53 MN54 MN58 MN52 MN51 MN54 MN55 MN59 MN53 MN52 MN55 MN56 MN60 MN54 MN53 MN56 MN58 MN61 MN55 MN54 MN57 MN59 MN62 MN56 MN55 MN58 MN60 MN63 MN57 MN56 MN59 MN61 MN64 MN58 MN57 MN60 MN63 MN65 MN59 MN58 MN61 MN64 MN66 MN60 MN59 MN62 MN65 MN67 MN61 MN60 MN63 MN66 MN68 MN62 MN61 MN64 MN67 MN69 MN63 MN62 MN65 MN68 MN70 MN64 MN63 MN66 MN69 MN71 MN65 MN64 MN67 MN70 MN72 MN66 MN65 MN68 MN71 MN73 MN67 MN67 MN69 MN72 MN74 MN68 MN68 MN70 MN73 MN75 MN69 MN69 MN71 MN74 MN76 MN70 MN70 MN72 MN75 MN77 MN71 MN71 MN73 MN76 MN78 MN72 MN72 MN74 MN77 MN79 MN73 MN73 MN75 MN78 MN80 MN74 MN74 MN76 MN79 MN81 MN75 MN75 MN77 MN80 MN82 MN76 MN76 MN78 MN81 MN83 MN77 MN77 MN79 MN82 MN84 MN78 MN78 MN80 MN83 MN85 MN79 MN79 MN81 MN84 MN86 MN80 MN80 MN82 MN85 MN87 MN81 MN81 MN83 MN86 MN88 MN82 MN82631-32-214



# SERVICE BULLETIN

January 13, 2014 Service Bulletin N° 631-32-214 Page 4 of 15 PIN PIN PIN PIN PIN D61032 D60968 D60955 D60999 D61061

S/N S/N S/N S/N S/N MN85 MN87 MN89 MN83 MN83 MN86 MN89 MN90 MN84 MN84 MN87 MN90 MN91 MN85 MN85 MN88 MN94 MN92 MN86 MN86 MN89 MN95 MN95 MN87 MN87 MN90 MN96 MN96 MN88 MN88 MN91 MN98 MN97 MN89 MN89 MN92 MN100 MN98 MN91 MN90 MN93 MN103 MN99 MN92 MN91 MN94 MN104 MN1 00 MN93 MN92 MN95 MN106 MN1 02 MN94 MN93 MN96 MN108 MN1 03 MN95 MN94 MN97 MN109 MN1 05 MN96 MN95 MN99 MN110 MN1 07 MN97 MN97 MN100 MN111 MN1 08 MN98 MN98 MN101 MN113 MN1 10 MN99 MN99 MN102 MN114 MN111 MN100 MN100 MN103 MN115 MN112 MN101 MN101 MN104 MN117 MN113 MN102 MN102 MN105 MN118 MN114 MN103 MN103 MN106 MN119 MN115 MN104 MN104 MN108 MN120 MN117 MN105 MN105 MN109 MN121 MN118 MN106 MN106 MN110 MN122 MN120 MN107 MN107 MN111 MN123 MN121 MN108 MN108 MN112 MN124 MN125 MN109 MN109 MN114 MN125 MN128 MN110 MN110 MN115 MN126 MN129 MN111 MN111 MN116 MN128 MN130 MN112 MN112 MN117 MN131 MN134 MN113 MN114 MN118 MN132 MN136 MN114 MN115 MN119 MN133 MN138 MN115 MN116 MN120 MN135 MN140 MN116 MN117 MN121 MN136 MN141 MN117 MN118 MN122 MN138 MN143 MN118 MN119 MN123 MN139 MN145 MN120 MN120 MN124 MN140 MN147 MN121 MN121 MN125 MN141 MN148 MN122 MN122631-32-214



# SERVICE BULLETIN

January 13, 2014 Service Bulletin N° 631-32-214 Page 5 of 15 PIN PIN PIN PIN PIN D61032 D60968 D60955 D60999 D61061

S/N S/N S/N S/N S/N MN126 MN142 MN149 MN123 MN123 MN127 MN143 MN150 MN124 MN124 MN128 MN144 MN151 MN125 MN125 MN129 MN145 MN152 MN126 MN126 MN130 MN146 MN153 MN127 MN127 MN131 MN148 MN155 MN128 MN128 MN132 MN149 MN156 MN129 MN129 MN133 MN150 MN157 MN130 MN130 MN134 MN151 MN158 MN131 MN131 MN135 MN152 MN160 MN132 MN132 MN136 MN153 MN161 MN133 MN133 MN137 MN154 MN162 MN134 MN134 MN138 MN155 MN163 MN135 MN135 MN139 MN156 MN165 MN136 MN136 MN140 MN157 MN166 MN137 MN137 MN141 MN158 MN167 MN138 MN138 MN142 MN159 MN169 MN139 MN139 MN143 MN160 MN170 MN140 MN140 MN144 MN161 MN171 MN141 MN141 MN145 MN162 MN173 MN142 MN142 MN146 MN164 MN175 MN143 MN143 MN147 MN165 MN176 MN144 MN144 MN148 MN166 MN178 MN146 MN145 MN149 MN167 MN180 MN147 MN146 MN150 MN168 MN181 MN148 MN147 MN151 MN170 MN182 MN149 MN149 MN152 MN171 MN183 MN150 MN150 MN153 MN172 MN184 MN151 MN151 MN154 MN173 MN185 MN152 MN152 MN155 MN174 MN186 MN153 MN153 MN156 MN175 MN187 MN155 MN154 MN158 MN176 MN188 MN156 MN155 MN159 MN177 MN190 MN157 MN156 MN160 MN178 MN191 MN158 MN158 MN161 MN179 MN192 MN159 MN160 MN162 MN180 MN193 MN161 MN161 MN163 MN181 MN194 MN162 MN163 MN164 MN182 MN195 MN163 MN164631-32-214



# SERVICE BULLETIN

January 13, 2014 Service Bulletin N° 631-32-214 Page 6 of 15 PIN PIN PIN PIN PIN D61032 D60968 D60955 D60999 D61061

S/N S/N S/N S/N S/N MN165 MN183 MN196 MN164 MN165 MN166 MN185 MN197 MN165 MN166 MN167 MN187 MN198 MN166 MN167 MN168 MN188 MN199 MN167 MN168 MN169 MN189 MN200 MN168 MN169 MN170 MN192 MN202 MN170 MN170 MN171 MN193 MN203 MN172 MN172 MN172 MN194 MN204 MN173 MN173 MN173 MN195 MN205 MN175 MN174 MN174 MN196 MN206 MN176 MN176 MN175 MN197 MN207 MN177 MN177 MN176 MN198 MN208 MN178 MN179 MN177 MN200 MN209 MN179 MN180 MN178 MN201 MN210 MN180 MN182 MN179 MN202 MN211 MN181 MN183 MN180 MN204 MN212 MN182 MN184 MN181 MN205 MN213 MN184 MN186 MN182 MN206 MN214 MN185 MN187 MN183 MN207 MN215 MN186 MN188 MN184 MN208 MN216 MN187 MN189 MN185 MN209 MN217 MN188 MN190 MN186 MN210 MN218 MN189 MN191 MN187 MN212 MN219 MN190 MN192 MN188 MN214 MN220 MN191 MN193 MN189 MN215 MN222 MN192 MN194 MN190 MN216 MN223 MN193 MN195 MN191 MN217 MN224 MN194 MN196 MN192 MN218 MN225 MN195 MN198 MN193 MN219 MN226 MN196 MN199 MN194 MN220 MN227 MN197 MN200 MN196 MN221 MN228 MN198 MN201 MN197 MN222 MN230 MN199 MN202 MN198 MN223 MN232 MN200 MN205 MN199 MN224 MN233 MN201 MN206 MN200 MN225 MN235 MN202 MN207 MN201 MN226 MN236 MN203 MN208 MN202 MN227 MN237 MN204 MN209 MN203 MN228 MN238 MN205 MN210631-32-214



# SERVICE BULLETIN

January 13, 2014 Service Bulletin N° 631-32-214 Page 7 of 15 PIN PIN PIN PIN PIN D61032 D60968 D60955 D60999 D61061

S/N S/N S/N S/N S/N MN204 MN229 MN239 MN206 MN211 MN205 MN230 MN240 MN207 MN212 MN206 MN231 MN241 MN208 MN213 MN207 MN232 MN242 MN209 MN214 MN208 MN233 MN243 MN210 MN215 MN209 MN234 MN244 MN211 MN217 MN210 MN235 MN245 MN212 MN218 MN211 MN236 MN246 MN213 MN219 MN212 MN237 MN248 MN214 MN220 MN213 MN238 MN249 MN215 MN221 MN214 MN238 MN250 MN216 MN222 MN215 MN239 MN251 MN217 MN223 MN216 MN243 MN252 MN218 MN224 MN217 MN245 MN253 MN219 MN225 MN218 MN246 MN254 MN220 MN226 MN219 MN248 MN255 MN221 MN227 MN220 MN249 MN257 MN222 MN228 MN221 MN250 MN258 MN223 MN229 MN222 MN251 MN260 MN224 MN230 MN223 MN252 MN261 MN225 MN232 MN224 MN253 MN262 MN226 MN233 MN225 MN255 MN265 MN227 MN234 MN226 MN256 MN266 MN229 MN235 MN227 MN257 MN267 MN230 MN236 MN228 MN258 MN268 MN231 MN237 MN229 MN259 MN270 MN233 MN238 MN230 MN260 MN271 MN234 MN239 MN231 MN261 MN272 MN235 MN240 MN233 MN262 MN273 MN236 MN241 MN235 MN263 MN274 MN237 MN242 MN237 MN266 MN275 MN238 MN243 MN238 MN267 MN277 MN239 MN244 MN239 MN268 MN278 MN240 MN245 MN241 MN269 MN279 MN241 MN246 MN242 MN270 MN280 MN242 MN247 MN244 MN271 MN281 MN245 MN248 MN245 MN273 MN282 MN246 MN249 MN246 MN274 MN284 MN247 MN250631-32-214



# SERVICE BULLETIN

January 13, 2014 Service Bulletin N° 631-32-214 Page 8 of 15 PIN PIN PIN PIN PIN D61032 D60968 D60955 D60999 D61061

S/N S/N S/N S/N S/N MN247 MN276 MN285 MN248 MN252 MN248 MN277 MN286 MN249 MN253 MN249 MN278 MN287 MN251 MN254 MN250 MN279 MN288 MN252 MN256 MN251 MN280 MN289 MN253 MN257 MN252 MN281 MN290 MN254 MN258 MN253 MN283 MN292 MN255 MN259 MN254 MN284 MN293 MN256 MN260 MN255 MN285 MN294 MN258 MN261 MN256 MN286 MN295 MN259 MN262 MN258 MN289 MN296 MN260 MN263 MN260 MN291 MN298 MN261 MN266 MN264 MN292 MN299 MN262 MN267 MN265 MN293 MN300 MN264 MN268 MN266 MN294 MN301 MN265 MN269 MN268 MN295 MN302 MN266 MN270 MN269 MN296 MN303 MN267 MN273 MN270 MN297 MN304 MN268 MN274 MN271 MN298 MN305 MN269 MN275 MN272 MN300 MN306 MN270 MN276 MN273 MN301 MN308 MN272 MN277 MN276 MN302 MN309 MN273 MN278 MN277 MN303 MN311 MN274 MN279 MN278 MN304 MN312 MN275 MN280 MN279 MN305 MN313 MN276 MN281 MN280 MN306 MN314 MN277 MN282 MN281 MN307 MN315 MN278 MN283 MN282 MN308 MN316 MN279 MN284 MN283 MN310 MN318 MN280 MN285 MN284 MN311 MN319 MN281 MN286 MN285 MN313 MN320 MN282 MN287 MN286 MN314 MN322 MN283 MN288 MN287 MN315 MN324 MN284 MN289 MN288 MN316 MN325 MN285 MN290 MN289 MN317 MN326 MN286 MN291 MN290 MN318 MN327 MN287 MN292 MN291 MN319 MN328 MN288 MN294 MN292 MN320 MN330 MN289 MN295631-32-214



# SERVICE BULLETIN

January 13, 2014 Service Bulletin N° 631-32-214 Page 9 of 15 PIN PIN PIN PIN PIN D61032 D60968 D60955 D60999 D61061

S/N S/N S/N S/N S/N MN293 MN322 MN331 MN290 MN296 MN294 MN323 MN332 MN291 MN297 MN295 MN324 MN333 MN292 MN298 MN296 MN325 MN334 MN293 MN299 MN297 MN326 MN335 MN294 MN300 MN298 MN327 MN337 MN295 MN301 MN299 MN328 MN338 MN296 MN302 MN300 MN329 MN339 MN297 MN303 MN301 MN330 MN340 MN298 MN305 MN302 MN331 MN341 MN299 MN306 MN303 MN332 MN343 MN300 MN307 MN304 MN334 MN344 MN301 MN308 MN305 MN335 MN345 MN302 MN309 MN306 MN336 MN347 MN303 MN310 MN307 MN337 MN348 MN304 MN311 MN309 MN338 MN350 MN305 MN312 MN310 MN339 MN351 MN306 MN313 MN312 MN340 MN355 MN307 MN314 MN313 MN341 MN357 MN308 MN315 MN314 MN342 MN360 MN309 MN316 MN315 MN343 MN361 MN310 MN317 MN316 MN344 MN362 MN312 MN318 MN317 MN345 MN364 MN313 MN319 MN318 MN346 MN365 MN314 MN320 MN320 MN347 MN367 MN315 MN321 MN322 MN348 MN368 MN316 MN322 MN323 MN349 MN369 MN317 MN323 MN324 MN350 MN370 MN319 MN324 MN325 MN351 MN378 MN320 MN325 MN329 MN352 MN381 MN321 MN326 MN333 MN356 MN383 MN322 MN327 MN336 MN357 MN386 MN323 MN328 MN339 MN360 MN388 MN324 MN329 MN340 MN361 MN389 MN326 MN330 MN341 MN363 MN393 MN327 MN331 MN342 MN364 MN394 MN329 MN333 MN345 MN367 MN396 MN336 MN334 MN346 MN369 MN397 MN337 MN335631-32-214



# SERVICE BULLETIN

January 13, 2014 Service Bulletin N° 631-32-214 Page 10 of 15 PIN PIN PIN PIN PIN D61032 D60968 D60955 D60999 D61061

S/N S/N S/N S/N S/N MN349 MN370 MN399 MN338 MN336 MN350 MN371 MN402 MN339 MN337 MN352 MN372 MN404 MN341 MN338 MN353 MN375 MN407 MN342 MN339 MN356 MN375 MN408 MN344 MN341 MN357 MN378 MN409 MN345 MN342 MN364 MN384 MN410 MN350 MN343 MN365 MN397 MN411 MN351 MN344 MN366 MN398 MN413 MN345 MN368 MN400 MN346 MN371 MN347 MN373 MN348 MN375 MN349 MN350 MN351 MN352 MN354 MN356 MN357 MN358 MN361 MN363 MN366 MN367 MN369

NOTE: Pins D61032, D60968, D60968-1, D60968-2, D60955, D60999, D61061 to be inspected are: those previously inspected by SPRO (in the frame of SB 631-32-125 or SB 631-32-126) or when the MRO is unknown. Pins already inspected in the frame of SB 631-32-214 do not need to be re-inspected.631-32-214



# SERVICE BULLETIN

January 13, 2014 Service Bulletin N° 631-32-214 Page 11 of 15 B. Reason

(1) To ensure that the main landing gear leg/aircraft front hinge pin, brace assembly center pin, swinging lever/barrel hinge pin, swi nging lever/universal joint hinge pin and shock absorber/universal joint hinge pin are free of burning marks and cracks.

C. Classification

Mandatory

D. Description (See figure 1)

(1) The accomplishment of this Service Bulletin consists in a one time inspection in the workshop, at the landing gear overhaul, of subj ect pins D60955, D60968, or D60968-1, or D60968-2, D60999, D61032 and D61061 installed on MLG or in spare.

(2) Tasks to be carried out

a) Workshop inspection (worksho p inspection is done by M.R.O.)

E. Approval

The technical content of this document is approved under the authority of D.O.A. N° EASA.21J044

F. Manpower

Work performed during overhaul.

G. Material - Cost and availability

(1) Material

None

(2) Cost :

In case of scrap of the pin due to evidence of burn mark and/or crack, the replacement pin will be chargeable at a discounted cata logue price - discount to be defined on a case by case basis, using a prorata calc ulation between CSN and life limit of the concerned P/N.631-32-214



# SERVICE BULLETIN

January 13, 2014 Service Bulletin N° 631-32-214 Page 12 of 15 H. References

- EASA Proposed Airworthines s Directive No. 14-034

- EASA Airworthiness Directive No. TBC

- DGAC Airworthiness Directive No. 96-096-029 (B)

- Standard Practice Manual 20-00-10, PCS 2110

- Standard Practice Manual 20-00-10, PCS 3600

- Standard Practice Manual 20-00-10, PCS 3100

I. Other publications affected

None.January 1 3 , 2014 D 6 

# S E

D60999

Loca 6 1061 

# E RVI

t ion of the hi F 

# CE

i nge pins to b F igure 1 

# BU L

e inspecte d 

# LE T

Se r d 

# T IN

r vice Bullet i 631-32- 2

n N° 631- 3 Page 1 3 2 14

3 2-214

3 of 15631-32-214



# SERVICE BULLETIN

January 13, 2014 Service Bulletin N° 631-32-214 Page 14 of 15 2. ACCOMPLISHMENT INSTRUCTIONS

A. General

This Service Bulletin is accomplished during ov erhaul of the MLG Legs and braces.

The inspections and the reconditioning of t he pins are accomplished in the workshop.

B. Inspection of hinge pin in workshop (by M.R.O.)

(1) Do a visual inspection of the part. - If chromium found crack, ship the part to Messier-Bugatti-Dowty Laboratory at, Materials Laboratory Messier-Dowty Ltd Cheltenham Road East Gloucester GL2 9QH England Attention to Sarah Jones Join to the part shipped a copy of the reporti ng form of the workshop, at the end of this SB. - If no crack found on the chromium inspect the part as per (3) and (4). (2) Remove the chromium plating in accordance with PCS 2110 (3) Do an inspection in accordance with PCS 3600 (4) Do a magnetic particle inspection in accordance with PCS 3100 (5) If finding on (3) or (4), ship the part to Messier-Bugatti-Dow ty Laboratory at, Materials Laboratory Messier-Dowty Ltd Cheltenham Road East Gloucester GL2 9QH England Attention to Sarah Jones. Join to the part shipped a copy of the report ing form of the workshop, at the end of this SB. - if no finding, re apply the chromium, as per (6). (6) Re apply chromium plating in accordance with PCS 2110.

NOTE: Complete the REPORTING FORM (at the end of this Service Bulletin)

C. Inspection reports

Send the inspection reports duly complete d to MESSIER-BUGATTI -DOWTY Technical Support.

mailto: eamecsc@safranmbd.com Fax: (+33) 1 46297948

With complete data filled by repair station.631-32-214



# SERVICE BULLETIN

January 13, 2014 Service Bulletin N° 631-32-214 Page 15 of 15 

# REPORTING FORM

ATR72 MLG Hinge Pins Inspection 

# MBD/RIL/214/2013

Please complete all areas with relevant data for each pin.

INSPECTION OF PINS BASE METAL BEHAVIOUR IN REPAIR SHOP

REPAIR CENTER : DATE :

OPERATOR : LEG ASSY : LEG P/N + SN : A/C MSN TOTAL CYCLES : CSN : CSO :

P/N OF PIN CSN : S/N OF PIN CSO : ACID ETCH finding defect YES : NO :

MAGNETIC PARTICLE INSPECTION finding defect YES : NO :



### Please return by email or Fax to:

MESSIER-BUGATTI-DOWTY Technical Support mailto: eamecsc@safranmbd.com Fax: (+33) 1 46297948

With complete data filled by repair station.