631-32-219

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# SERVICE BULLETIN

March 03, 2014 Service Bulletin N° 631-32-219 Page 1 of 8 ATR 72 MAIN LANDING GEAR HINGE PINS INSPECTION

1. PLANNING INFORMATION.

A. Effectivity.

(1) In-service aircraft affected.

ATR 72 all types.

(2) In-service and spare components affected.

Pins D60955, D60968, D61032, D61061, and D60999 listed in the following table.631-32-219 

# SERVICE BULLETIN

March 03, 2014 Service Bulletin N° 631-32-219 Page 2 of 8 PIN PIN D60968

S/N PIN D61032

S/N D60955

S/N SN414 MN31 MN419 MN376 MN412 SN415 MN312 MN420 MN377 MN413 SN416 MN353 MN421 MN378 MN414 SN417 MN355 MN422 MN379 MN415 SN418 MN362 MN423 MN380 SN419 MN365 MN424 MN381 SN420 MN366 MN425 MN382 SN421 MN368 MN426 MN383 SN422 MN374 MN427 MN384 SN423 MN376 MN428 MN385 MN377 MN429 MN386 MN379 MN430 MN387 MN380 MN431 MN388 MN381 MN432 MN389 MN382 MN433 MN390 MN383 MN434 MN391 MN385 MN435 MN392 MN393 MN436 MN393 MN401 MN437 MN394 MN402 MN438 MN395 MN403 MN439 MN396 MN404 MN440 MN397 MN405 MN441 MN398 MN406 MN442 MN399 MN407 MN443 MN400 MN408 MN444 MN401 MN409 MN445 MN402 MN410 MN446 MN403 MN411 MN447 MN404 MN412 MN448 MN405 MN413 MN449 MN406 MN414 MN407 MN415 MN408 MN416 MN409 MN417 MN410 MN418 MN411

NOTE: Pins already inspected in the frame of SB 631-32-219 do not need to be re-inspected.631-32-219


# SERVICE BULLETIN

March 03, 2014 Service Bulletin N° 631-32-219 Page 3 of 8 PIN D61061

S/N

MN359 07MN03 07MN39 MN364 07MN04 07MN40 MN370 07MN05 12MN00101 MN371 07MN06 12MN00102 MN372 07MN07 12MN00103 MN513 07MN08 12MN00104 MN514 07MN09 12MN00105 MN515 07MN10 12MN00106 MN516 07MN11 12MN00107 MN517 07MN12 12MN00108 MN518 07MN13 12MN00109 MN519 07MN14 12MN00110 MN520 07MN15 12MN00111 MN521 07MN16 12MN00112 MN522 07MN17 12MN00113 MN523 07MN18 12MN00114 MN594 07MN19 12MN00115 MN595 07MN20 12MN00116 MN596 07MN21 12MN00117 MN597 07MN22 12MN00118 MN598 07MN23 MN599 07MN24 MN600 07MN25 MN601 07MN26 MN602 07MN27 MN603 07MN28 MN618 07MN29 MN619 07MN30 MN620 07MN31 MN621 07MN32 MN622 07MN33 MN623 07MN34 MN624 07MN35 MN625 07MN36 07MN01 07MN37 07MN02 07MN38

NOTE: Pins already inspected in the frame of SB 631-32-219 do not need to be re-inspected.631-32-219


# SERVICE BULLETIN

March 03, 2014 Service Bulletin N° 631-32-219 Page 4 of 8 PIN D60999

S/N

MN318 07MN124 07MN160 07MN196 08MN33 MN325 07MN125 07MN161 07MN197 08MN34 MN328 07MN126 07MN162 07MN198 08MN35 MN330 07MN127 07MN163 07MN199 08MN36 MN331 07MN128 07MN164 08MN01 08MN37 MN332 07MN129 07MN165 08MN02 08MN38 MN333 07MN130 07MN166 08MN03 08MN39 MN334 07MN131 07MN167 08MN04 08MN40 MN603 07MN132 07MN168 08MN05 MN604 07MN133 07MN169 08MN06 MN605 07MN134 07MN170 08MN07 MN606 07MN135 07MN171 08MN08 07MN013 07MN136 07MN172 08MN09 07MN014 07MN137 07MN173 08MN10 07MN015 07MN138 07MN174 08MN11 07MN016 07MN139 07MN175 08MN12 07MN017 07MN140 07MN176 08MN13 07MN018 07MN141 07MN177 08MN14 07MN019 07MN142 07MN178 08MN15 07MN020 07MN143 07MN179 08MN16 07MN021 07MN144 07MN180 08MN17 07MN022 07MN145 07MN181 08MN18 07MN023 07MN146 07MN182 08MN19 07MN047 07MN147 07MN183 08MN20 07MN048 07MN148 07MN184 08MN21 07MN049 07MN149 07MN185 08MN22 07MN050 07MN150 07MN186 08MN23 07MN051 07MN151 07MN187 08MN24 07MN052 07MN152 07MN188 08MN25 07MN053 07MN153 07MN189 08MN26 07MN054 07MN154 07MN190 08MN27 07MN055 07MN155 07MN191 08MN28 07MN056 07MN156 07MN192 08MN29 07MN057 07MN157 07MN193 08MN30 07MN058 07MN158 07MN194 08MN31 07MN123 07MN159 07MN195 08MN32

NOTE: Pins already inspected in the frame of SB 631-32-219 do not need to be re-inspected.631-32-219


# SERVICE BULLETIN

March 03, 2014 Service Bulletin N° 631-32-219 Page 5 of 8 B. Reason.

(1) To ensure that the main landing gear leg/ai rcraft front hinge pin, the side braces assembly center pin, the barrel/swinging lever pin, sh ock absorber/universal joint hinge pin and the swinging lever/U-joint 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 subject pins D60999, D61061, D60968, D60955, and D61032, 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 a pin due to evidence of burn mark and/or crack, the replacement pin will be chargeable at a discounted catalogue price - discount to be defined on a case by case basis, using a prorata calculation betw een CSN and life limit of the concerned P/N.

H. References.

- EASA Proposed Airworthines s Directive No. 14-034.

- EASA Airworthiness Directive No TBC.

- 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.631-32-219


# SERVICE BULLETIN

March 03, 2014 Service Bulletin N° 631-32-219 Page 6 of 8 D60999

Location of the hinge pins to be inspected.

Figure 1 D60968 D60955 D61061

D61032631-32-219


# SERVICE BULLETIN

March 03, 2014 Service Bulletin N° 631-32-219 Page 7 of 8 2. ACCOMPLISHMENT INSTRUCTIONS.

A. General.

(1) This Service Bulletin is accomplished duri ng overhaul of the MLG Legs and braces. (2) The inspections and the reconditioning of the 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 etch 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 completed to MESSIER-BUGATTI-DOWTY Technical Support.

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

With complete data filled by repair station.631-32-219


# SERVICE BULLETIN

March 03, 2014 Service Bulletin N° 631-32-219 Page 8 of 8 

# REPORTING FORM

ATR72 MLG Hinge Pins Inspection 

# MBD/RIL/219/2014

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.