Airworthiness Directive · Amendment 39-17143 · Wings
Airbus Airplanes
This AD applies to Airbus Model A300 B4-2C, B4-103, and B4-203 airplanes; Model B4-601, B4-603, B4-620, B4-622, B4-605R, B4-622R, F4-605R, and F4-622R airplanes; and Model A300 C4-605R Variant F airplanes; certificated in any category; all serial numbers except for airplanes identified in paragraphs (c)(1), (c)(2), and (c)(3) of this AD.
(1) Airplanes on which LH (left-hand) and RH (right-hand) wing main landing gear (MLG) rib 5 forward lugs have oversized interference fit bushings installed per Airbus Repair Instruction R57240221.
(2) Model A300 B4-103, B4-203, and B4-2C airplanes on which Airbus Mandatory Service Bulletin A300-57-0249 has been done in service on the LH and RH wing.
(3) Model A300-600 series airplanes on which Airbus Mandatory Service Bulletin A300-57-6106 has been done in service on the LH and RH wing.
We are adopting a new airworthiness directive (AD) for certain Airbus Model A300 B4-103, B4-203, and B4-2C airplanes, and Model A300 B4-600, B4-600R, and F4-600R series airplanes, and Model A300 C4-605R Variant F airplanes (collectively called A300-600 series airplanes). This AD was prompted by reports of cracking in the forward lug of the main landing gear (MLG) rib 5 aft bearing attachment. This AD requires repetitive inspections for cracking of the left-hand (LH) and right- hand (RH) wing MLG rib 5 aft bearing forward lugs, and repair if necessary. We are issuing this AD to detect and correct cracking of the LH and RH wing MLG rib 5 aft bearing forward lugs, which could affect the structural integrity of the MLG attachment, resulting in MLG collapse during landing or rollout with consequent damage to the airplane and injury to occupants.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
Except as provided by paragraph (h) of this AD, before the accumulation of 12,000 total flight cycles since new, or within 12,000 flight cycles since the most recent MLG rib 5 replacement, if applicable, or within 10 days after the effective date of this AD, whichever occurs latest: Do a detailed inspection or an ultrasonic inspection for cracking of the LH and RH MLG rib 5 aft bearing forward lugs, in accordance with the Accomplishment Instructions of Airbus Mandatory Service Bulletin A300-57-0251, including Appendix 01, dated August 8, 2007 (for Model A300 B4-103, B4-203, and B4-2C airplanes); or Airbus Mandatory Service Bulletin A300-57-6107, including Appendix 01, dated August 8, 2007 (for Model A300-600 series airplanes). Repeat the applicable inspections thereafter at the applicable interval specified in paragraph (g)(1) or (g)(2) of this AD, until the modification specified in paragraph (j) of this AD is accomplished.
(1) Repeat the detailed inspections at intervals not to exceed 100 flight cycles.
(2) Repeat the ultrasonic inspections at intervals not to exceed 675 flight cycles.
For airplanes on which an inspection required by AD 2007-03-18, Amendment 39-14929 (72 FR 5919, February 8, 2007), has been done as of the effective date of this AD: Within 100 flight cycles after doing the most recent inspection required by AD 2007-03-18, or within 10 days after the effective date of this AD, whichever occurs later, do a detailed or ultrasonic inspection as specified in paragraph (g) of this AD. Repeat the applicable inspection thereafter at the times specified in paragraph (g) of this AD.
If any cracking is detected during any detailed or ultrasonic inspection of the LH and RH MLG rib 5 aft bearing forward lugs required by paragraph (g) of this AD, before further flight, repair using a method approved by either the Manager, International Branch, ANM-116, Transport Airplane Directorate, FAA; or the European Aviation Safety Agency (EASA) (or its delegated agent).
Performing the applicable actions specified in paragraphs (j)(1), (j)(2), (j)(3) and (j)(4) of this AD, in accordance with the Accomplishment Instructions of Airbus Mandatory Service Bulletin A300-57-0249, Revision 02, dated June 18, 2010 (for Model A300 B4-103, B4-203, and B4-2C airplanes); or Airbus Mandatory Service Bulletin A300-57-6106, Revision 03, dated January 26, 2012 (for Model A300-600 series airplanes); terminates the repetitive inspections required by this AD.
(1) Perform a general visual inspection and dye penetrant flaw detection inspection for corrosion and damage of the bore and spotfaces of the lug.
(2) Determine that the diameter of the bore of the lug (dimension Y) is within the tolerance specified in the Accomplishment Instructions of Airbus Mandatory Service Bulletin A300-57-0249, Revision 02, dated June 18, 2010 (for Model A300 B4-103, B4-203, and B4-2C airplanes); or Airbus Mandatory Service Bulletin A300-57-6106, Revision 03, dated January 26, 2012 (for Model A300-600 series airplanes).
(3) If damage or corrosion is detected during any inspection specified in paragraph (j)(1) of this AD, or if dimension Y is outside the tolerance specified in the Accomplishment Instructions of Airbus Mandatory Service Bulletin A300-57-0249, Revision 02, dated June 18, 2010 (for Model A300 B4-103, B4-203, and B4-2C airplanes); or Airbus Mandatory Service Bulletin A300-57-6106, Revision 03, dated January 26, 2012 (for Model A300-600 series airplanes); repair using a method approved by either the Manager, International Branch, ANM-116, Transport Airplane Directorate, FAA; or the EASA (or its delegated agent).
(4) Install bushings with an increased interference fit in the aft bearing forward lugs, in accordance with the Accomplishment Instructions of Airbus Mandatory Service Bulletin A300-57-0249, Revision 02, dated June 18, 2010 (for Model A300 B4-103, B4-203, and B4-2C airplanes); or Airbus Mandatory Service Bulletin A300-57-6106, Revision 03, dated January 26, 2012 (for Model A300-600 series airplanes).
Doing the actions required by paragraph (j) of this AD terminates the requirements of AD 2007-03-18, Amendment 39-14929 (72 FR 5919, February 8, 2007), for that airplane.
Submit a report (including both positive and negative findings), using the applicable report sheet attached to Airbus Mandatory Service Bulletin A300-57-0251, including Appendix 01, dated August 8, 2007 (for Model A300 B4-103, B4-203, and B4-2C airplanes); or Airbus Mandatory Service Bulletin A300-57-6107, including Appendix 01, August 8, 2007 (for Model A300-600 series airplanes); of the first inspection required by paragraph (g) of this AD. Submit the report to Airbus, Customer Services Directorate, 1 Rond Point Maurice Bellonte, 31707 Blagnac Cedex France, Attn: SEDCC1 Technical Data and Documentation Services; fax: (+33) 5 61 93 28 06; email: sb.reporting@airbus.com; at the applicable time specified in paragraph (l)(1) or (l)(2) of this AD.
(1) If the inspection was done on or after the effective date of this AD: Submit the report within 30 days after the inspection.
(2) If the inspection was done before the effective date of this AD: Submit the report within 30 days after the effective date of this AD.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
