AD NUMBER: 2009-12-11

MANUFACTURER: Airbus Model A340-541 and -642 Airplanes
SUBJECT: Airworthiness Directive 2009-12-11

SUMMARY: We are adopting a new airworthiness directive (AD) for the products listed above. 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:

• Following a refined Finite Element Model (FEM) analysis of the Nose Landing Gear (NLG) actuator fitting installed on the roof panel of the NLG box of all A340-500/-600 aircraft, it has been demonstrated that potential fatigue cracks can be initiated on the NLG actuator fitting flanges.
• This situation, if not corrected, could lead to inadvertent extension of the NLG which could adversely affect the aircraft's continued safe flight or [could result in] failure to retract the NLG which, in combination with an engine failure, could adversely affect the aircraft's safe take off.
• This AD requires actions that are intended to address the unsafe condition described in the MCAI.

FMI: http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgAD.nsf/0/372659DB12AE7F63862575D3004B072C?OpenDocument