FAA proposes AD for ATR42/72 nose landing gear retraction risk

The FAA proposes a new airworthiness directive for all ATR42 and ATR72 aircraft following reports of uncommanded nose landing gear retraction. The AD mandates leakage tests and replacement of certain landing gear selector valves, and restricts installation of affected parts. This is a regulatory safety action addressing a specific mechanical failure mode, with no indication of active incidents or market impact.