Summary
We propose to adopt a new airworthiness directive (AD) for the products listed above. 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:
Following a red illuminated "DOOR NOT LOCKED'' status light indication on the door lock indication panel after lift off, the cabin crew operated the door lock handle. This resulted in inadvertent opening of the downward opening passenger door in flight. * * * After inspection, it was found that the false red light might be the result of an incorrect clearance between lever Part Number (P/N) A26997-003 and the Up-Limit Switch. If the Up-Limit Switch has an incorrect clearance, the combination with cabin differential pressure build-up after lift-off might result in a false steady illuminating red "DOOR NOT LOCKED'' indication on the Door Indication Panel. * * *
* * * * * The unsafe condition is inadvertent opening of the door lock handle in flight, which could result in rapid decompression of the airplane or ejection of a passenger or crewmember through the door. The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI.