Airworthiness Directive · Amendment 39-16298 · Powerplant
Airbus Model A340-200 and A340-300 Series Airplanes
This AD applies to Airbus Model A340-211, -212, -213, -311, -312, and -313 airplanes, all manufacturer serial numbers; certificated in any category.
We are adopting a new airworthiness directive (AD) for the products listed above that supersedes an existing AD. This AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as: * * * * * Engineering analysis using the new calculated loads has shown that the structural integrity of the forward engine mount cannot be guaranteed after either thrust link has accumulated 15500 Flight Cycles (FC). * * * * * A loss of structural integrity of the forward engine mounts could lead to the loss of the load path for the forward engine mount and damage to other engine mount structures, which could result in failure of the forward engine mount, possible separation of the engine from the airplane, damage to the wing, or loss of control of the airplane. This AD requires actions that are intended to address the unsafe condition described in the MCAI.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
Do the following actions.
(1) At the applicable time specified in paragraph (g)(1)(i) or (g)(1)(ii) of this AD: Calculate the flight cycles, as applicable, and replace all CFM 56-5C forward engine mount thrust links P/N 340-7005-3 or P/N 340-7005-4, in accordance with the Accomplishment Instructions of Airbus Mandatory Service Bulletin A340-71-4006, Revision 01, dated May 14, 2009.
Note 1: P/N 340-7005-3 and P/N 340-7005-4 are the part numbers for only the link. P/N 340-7005-503 and P/N 340-7005-504 are the part numbers for the assembly (comprising the bearing and the link).
(i) For airplanes with thrust links for which the history of the part is available: Replace in accordance with Airbus Mandatory Service Bulletin A340-71-4006, Revision 01, dated May 14, 2009, prior to the accumulation of 15,500 total flight cycles on the part, or within 90 days from the effective date of the AD, whichever occurs later.
(ii) For airplanes with thrust links for which the part history is partial or unknown: Within 30 days after the effective date of this AD, calculate the limit for replacement in accordance with the calculation method provided in Airbus Mandatory Service Bulletin A340-71-4006, Revision 01, dated May 14, 2009, and replace the part no later than the calculated limit for replacement.
(2) Repeat the replacement required by paragraph (g)(1) of this AD at intervals not to exceed 15,500 flight cycles on the part in accordance with the Accomplishment Instructions of Airbus Mandatory Service Bulletin A340-71-4006, Revision 01, dated May 14, 2009.
Note 2: This AD differs from the MCAI and/or service information as follows: No differences.
