Summary
We propose to adopt a new airworthiness directive (AD) for the products listed above that would supersede an existing AD. This proposed 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:
The right-hand inboard main landing gear (MLG) door of a CRJ 700 departed the aircraft during the landing phase of flight. The door damaged the trailing edge flap and punctured the rear fuselage near the floor level. The aircraft landed safely. Preliminary investigation indicates the failure was initiated by fatigue of the panel structure near a panel hinge lug. Loss of the main landing gear door during flight could result in damage to the aircraft and injury to persons on the ground.
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The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI.