Airworthiness Directive · Amendment 39-19000 · Landing gear
ATR-GIE Avions de Transport Régional Airplanes
This AD applies to ATR-GIE Avions de Transport Régional Model ATR42-200, -300, -320, and -500 airplanes; and ATR72-101, -201, -102, -202, -211, -212, and -212A airplanes; certificated in any category; all certified models; all manufacturer serial numbers.
We are superseding Airworthiness Directive (AD) 2015-23-12, which applied to all ATR-GIE Avions de Transport R[eacute]gional Model ATR42 and ATR72 airplanes. AD 2015-23-12 required identifying the serial number and part number of the main landing gear (MLG) rear hinge pins, and replacing pins or the MLG if necessary. This AD retains the requirements of AD 2015-23-12, requires replacing certain additional MLG hinge pins, and reduces certain compliance times. This AD was prompted by a new occurrence of a cracked MLG rear hinge pin. We are issuing this AD to address the unsafe condition on these products.
This paragraph restates the requirements of paragraph (g) of AD 2015-23-12, with terminating action. For Model ATR72 airplanes: Within 12 months after December 29, 2015 (the effective date of AD 2015-23-12), inspect for the serial number of the left-hand (LH) and right-hand (RH) MLG rear hinge pins having part number (P/N) D61000. A review of airplane maintenance records is acceptable in lieu of this identification if the part number and serial number of the LH and RH MLG rear hinge pins can be conclusively determined from that review. If a rear hinge pin having P/N D61000 has a serial number listed in Messier-Bugatti-Dowty Service Bulletin 631-32-213, dated December 16, 2013; or Messier-Bugatti-Dowty Service Bulletin 631-32-216, Revision 1, dated December 17, 2013; as applicable: Within 12 months after December 29, 2015, replace the pin with a serviceable part as identified in paragraph (h) of this AD, in accordance with the Accomplishment Instructions of Messier-Bugatti-Dowty Service Bulletin 631-32-213, dated December 16, 2013; or Messier-Bugatti-Dowty Service Bulletin 631-32-216, Revision 1, dated December 17, 2013; as applicable. Accomplishment of the actions required by paragraph (l) of this AD terminates the inspection required by this paragraph. Accomplishing the actions required by paragraph (m) or (o) of this AD terminates the actions required by this paragraph.
This paragraph restates the definition in paragraph (h) of AD 2015-23-12, with no changes. For Model ATR72 airplanes: For purposes of paragraph (g) of this AD, a serviceable MLG rear hinge pin is a pin that is specified in paragraph (h)(1) or (h)(2) of this AD.
(1) A hinge pin that is not identified in Messier-Bugatti-Dowty Service Bulletin 631-32-213, dated December 16, 2013; or Messier-Bugatti-Dowty Service Bulletin 631-32-216, Revision 1, dated December 17, 2013; as applicable.
(2) A hinge pin that has been inspected and reconditioned, in accordance with the Accomplishment Instructions of Messier-Bugatti-Dowty Service Bulletin 631-32-213, dated December 16, 2013; or Messier-Bugatti-Dowty Service Bulletin 631-32-216, Revision 1, dated December 17, 2013; as applicable.
This paragraph restates the requirements of paragraph (i) of AD 2015-23-12, with terminating action. For Model ATR72 airplanes: At the earlier of the times specified in paragraphs (i)(1) and (i)(2) of this AD, inspect all LH and RH MLG pins for a part number and serial number listed in Messier-Bugatti-Dowty Service Bulletin 631-32-214, dated January 13, 2014; or Messier-Bugatti-Dowty Service Bulletin 631-32-219, dated March 3, 2014; as applicable. A review of airplane maintenance records is acceptable in lieu of this inspection if the part number and serial number of the LH and RH MLG pin can be conclusively determined from that review. If any affected MLG pin is found: At the earlier of the compliance times specified in paragraphs (i)(1) and (i)(2) of this AD, replace the MLG with a serviceable MLG as identified in paragraph (j) of this AD, using a method approved by the Manager, International Section, Transport Standards Branch, FAA; or the European Aviation Safety Agency (EASA); or ATR-GIE Avions de Transport Régional's EASA Design Organization Approval (DOA). Accomplishment of the actions required by paragraph (l) of this AD terminates the inspection for the part number and serial number of the LH and RH MLG rear hinge pins required by this paragraph. Accomplishment of the actions required by paragraph (m) or (o) of this AD terminates the actions required by this paragraph.
(1) No later than the next MLG overhaul scheduled after December 29, 2015 (the effective date of AD 2015-23-12).
(2) Within 20,000 flight cycles or 9 years, whichever occurs first, accumulated since installation of the MLG on an airplane since new or since last overhaul, as applicable.
This paragraph restates the definition in paragraph (j) of AD 2015-23-12, with no changes. For Model ATR72 airplanes: For purposes of paragraph (i) of this AD, a serviceable MLG is one that incorporates pins specified in paragraph (j)(1) or (j)(2) of this AD.
(1) Pins that are not identified in Messier-Bugatti-Dowty Service Bulletin 631-32-214, dated January 13, 2014; or Messier-Bugatti-Dowty Service Bulletin 631-32-219, dated March 3, 2014; as applicable.
(2) Pins that have been inspected and reconditioned in accordance with the Accomplishment Instructions of Messier-Bugatti-Dowty Service Bulletin 631-32-214, dated January 13, 2014; or Messier-Bugatti-Dowty Service Bulletin 631-32-219, dated March 3, 2014; as applicable.
This paragraph restates the requirements of paragraph (k) of AD 2015-23-12, with terminating action. Accomplishment of the actions required by paragraph (l) of this AD terminates the actions required by paragraph (k)(1) of this AD. Accomplishment of the actions required by paragraph (m) or (o) of this AD terminates the actions required by paragraph (k)(2) of this AD.
(1) For Model ATR42 airplanes: Within the compliance time identified in paragraph (k)(1)(i) or (k)(1)(ii) of this AD, whichever occurs first, inspect for any LH and RH MLG pins having a part number and serial number listed in Messier-Bugatti-Dowty Service Bulletin 631-32-215, dated January 13, 2014; or Messier-Bugatti-Dowty Service Bulletin 631-32-220, dated March 3, 2014; as applicable. A review of airplane maintenance records is acceptable in lieu of this identification if the part number and serial number of the LH and RH MLG pin can be conclusively determined from that review.
(i) No later than the next MLG overhaul scheduled after December 29, 2015 (the effective date of AD 2015-23-12).
(ii) Within 20,000 flight cycles or 9 years, whichever occurs first, accumulated since installation of the MLG on an airplane since new or since last overhaul, as applicable.
(2) If the MLG pin having a part number and serial number listed in Messier-Bugatti-Dowty Service Bulletin 631-32-215, dated January 13, 2014; or Messier-Bugatti-Dowty Service Bulletin 631-32-220, dated March 3, 2014; as applicable; is found to be installed during the identification required by paragraph (k)(1) of this AD, within the compliance time identified in paragraph (k)(1) of this AD, replace the MLG with a serviceable MLG, using a method approved by the Manager, International Section, Transport Standards Branch, FAA; or the EASA; or ATR-GIE Avions de Transport Régional's EASA DOA. For the purposes of this paragraph, a serviceable MLG is a part that has pins identified in paragraph (k)(2)(i) or (k)(2)(ii) of this AD.
(i) Pins that are not listed in Messier-Bugatti-Dowty Service Bulletin 631-32-215, dated January 13, 2014; or Messier-Bugatti-Dowty Service Bulletin 631-32-220, dated March 3, 2014; as applicable.
(ii) Pins that have been inspected and reconditioned, in accordance with the Accomplishment Instructions of Messier-Bugatti-Dowty Service Bulletin 631-32-215, dated January 13, 2014; or Messier-Bugatti-Dowty Service Bulletin 631-32-220, dated March 3, 2014; as applicable.
Within the applicable compliance time specified in, and in accordance with the Accomplishment Instructions of, the applicable Messier-Bugatti-Dowty Service Bulletin specified in figure 1 to paragraphs (l) through (p) of this AD, or figure 2 to paragraphs (l) through (p) of this AD, as applicable to the airplane model and MLG hinge part number, identify the serial number (S/N) of the LH and RH MLG hinge pins. A review of airplane maintenance records is acceptable in lieu of this identification if the part number and serial number of the LH and RH MLG hinge pins can be conclusively determined from that review. Accomplishment of the actions required by this paragraph terminates the inspections required by paragraphs (g), (i), and (k)(1) of this AD.
| MLG hinge part Nos. | Applicable Messier-Bugatti-Dowty service bulletins | Compliance time |
|---|---|---|
| D60955, D60968, D60999, D61032, D61061 | Messier-Bugatti-Dowty Service Bulletin 631-32-214, Revision 1, dated March 15, 2016, Messier-Bugatti-Dowty Service Bulletin 631-32-219, Revision 1, dated March 15, 2016, or Messier-Bugatti-Dowty Service Bulletin 631-32-233, dated March 15, 2016. | A or B, whichever occurs first: A: Not later than the next scheduled MLG overhaul after the effective date of this AD. B: Within 20,000 flight cycles or 9 years, whichever occurs first, accumulated since first installation of a MLG on an airplane since new, or since last overhaul, as applicable. |
| D61000 | Messier-Bugatti-Dowty Service Bulletin 631-32-213, Revision 2, dated March 15, 2016, | Within 12 months after the effective date of this AD. |
| Messier-Bugatti-Dowty Service Bulletin 631-32-216, Revision 3, dated March 15, 2016, or | ||
| Messier-Bugatti-Dowty Service Bulletin 631-32-232, Revision 1, dated March 15, 2016. |
| MLG hinge part Nos. | Airplane model(s) | Applicable Messier-Bugatti-Dowty service bulletins | Compliance time |
|---|---|---|---|
| D62054, D63823, D63825 | All | Messier-Bugatti-Dowty Service Bulletin 631-32-215, Revision 1, dated March 15, 2016, | A or B, whichever occurs first: A: Not later than the next scheduled MLG overhaul after the effective date of this AD. |
| Messier-Bugatti-Dowty Service Bulletin 631-32-220, Revision 1, dated March 15, 2016, or Messier-Bugatti-Dowty Service Bulletin 631-32-235, dated March 15, 2016. | B: Within 20,000 flight cycles or 9 years, whichever occurs first, accumulated since first installation of a MLG on an airplane since new, or since last overhaul, as applicable. | ||
| D56800, D56800-1, D56809, D56841, D57261, D57401, D57407, D58807, D62079 | ATR42-300 | Messier-Bugatti-Dowty Service Bulletin 631-32-215, Revision 1, dated March 15, 2016, Messier-Bugatti-Dowty Service Bulletin 631-32-220, Revision 1, dated March 15, 2016, or Messier-Bugatti-Dowty Service Bulletin 631-32-235, dated March 15, 2016. | A or B, whichever occurs first: A: Not later than the next scheduled MLG overhaul after the effective date of this AD. B: Within 20,000 flight cycles or 9 years, whichever occurs first, accumulated since first installation of a MLG on an airplane since new, or since last overhaul, as applicable. |
| D62055 | All | Messier-Bugatti-Dowty Service Bulletin 631-32-224, dated March 15, 2016, | Within 24 months after the effective date of this AD. |
| Messier-Bugatti-Dowty Service Bulletin 631-32-231, dated March 15, 2016, or | |||
| Messier-Bugatti-Dowty Service Bulletin 631-32-234, dated March 15, 2016. |
If, during the identification required by paragraph (l) of this AD, an MLG hinge pin with a serial number listed in the applicable Messier-Bugatti-Dowty Service Bulletin is found to be installed: Within the compliance time specified in figure 1 to paragraphs (l) through (p) of this AD, or figure 2 to paragraphs (l) through (p) of this AD, as applicable to airplane model and MLG hinge pin part number, replace each affected MLG hinge pin with a serviceable MLG hinge pin. The replacement must be done in accordance with the Accomplishment Instructions of the applicable Messier-Bugatti-Dowty Service Bulletin specified in figure 1 to paragraphs (l) through (p) of this AD, or figure 2 to paragraphs (l) through (p) of this AD, as applicable to the airplane model and MLG hinge part number, except as required by paragraph (o) of this AD. Accomplishment of the actions required by this paragraph terminates the actions required by paragraphs (g) and (i) of this AD. Accomplishment of the actions required by this paragraph terminates the replacement required by paragraph (k)(2) of this AD.
For the purpose of paragraph (m) of this AD, a serviceable MLG hinge pin is a pin that is specified in paragraph (n)(1) or (n)(2) of this AD.
(1) A hinge pin that does not belong to the identified batch as listed in the applicable Messier-Bugatti-Dowty Service Bulletin specified in figure 1 to paragraphs (l) through (p) of this AD, or figure 2 to paragraphs (l) through (p) of this AD, as applicable to the airplane model and MLG hinge part number.
(2) A hinge pin that can be identified, through the MLG maintenance records, as having been inspected and reconditioned in accordance with the Accomplishment Instructions of the applicable Messier-Bugatti-Dowty Service Bulletin specified in figure 1 to paragraphs (l) through (p) of this AD, or figure 2 to paragraphs (l) through (p) of this AD, as applicable to the airplane model and MLG hinge part number.
If, during accomplishment of the MLG hinge pin replacement required by paragraph (m) of this AD, the applicable Messier-Bugatti-Dowty Service Bulletin specified in figure 1 to paragraphs (l) through (p) of this AD, or figure 2 to paragraphs (l) through (p) of this AD, does not specify the MLG hinge pin replacement procedure, do the MLG hinge pin replacement using a method approved by the Manager, International Section, Transport Standards Branch, FAA; or the EASA; or ATR—GIE Avions de Transport Régional's EASA DOA. Do the MLG hinge pin replacement at the applicable compliance time specified in paragraph (m) of this AD. Accomplishment of the actions required by this paragraph terminates the hinge pin replacement required by paragraphs (g), (i), and (k)(2) of this AD.
As of the effective date of this AD, no person may install on any airplane an MLG hinge pin having a part number identified in figure 1 to paragraphs (l) through (p) of this AD, or figure 2 to paragraphs (l) through (p) of this AD, and having a serial number defined in the applicable Messier-Bugatti-Dowty Service Bulletin specified in figure 1 to paragraphs (l) through (p) of this AD, or figure 2 to paragraphs (l) through (p) of this AD, as applicable to the airplane model and MLG hinge part number, unless the part can be conclusively identified, through the MLG maintenance records, as having been inspected and reconditioned in accordance with the Accomplishment Instructions of the applicable Messier-Bugatti-Dowty Service Bulletin.
