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Tue, Jul 06, 2010

AD: Airbus

AD NUMBER: AD 2010-14-04

MANUFACTURER: Airbus Model A330-243, -341, -342, and -343 Airplanes; and Model A340-541 and -642 Airplanes; Equipped With Rolls-Royce Trent 500 and Trent 700 Series Engines
SUBJECT: Airworthiness Directive AD 2010-14-04

SUMMARY: 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:

It has been evidenced by test that the tightening torque settings on the Rolls-Royce Trent 500 and Trent 700 forward (FWD) and aft (AFT) engine mount link pin retention bolts have always been higher than the design value. These bolts retain the washers that maintain the engine mount vertical load pins in position.

If bolts, as a consequence of the over-torque, fail and move away, it would lead to loss of the vertical load pins, which could result in loss of the primary and/or secondary load path of the forward and/or aft engine mount which could potentially lead to engine separation.

FMI: http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgAD.nsf/0/1C527012858C0BF386257753005E1245?OpenDocument

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