FAA proposes AD for Boeing 747-400 ACMP fire risk

The FAA proposes a new airworthiness directive for Boeing 747-400 and 747-400F aircraft following a report of an overheated ACMP causing a fire in the main landing gear wheel well. The AD would require maintenance records checks or inspections for affected parts and prohibit their installation. This is a regulatory safety action, not a market-moving event, but it highlights ongoing fleet safety concerns.

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