The Federal Aviation Administration (FAA) on Friday issued an emergency airworthiness directive for 2,000 U.S.-registered Boeing 737 NG and Classic aircraft that have been in storage, warning they could have corrosion that could lead to a dual-engine failure.
The directive covers planes not operated for seven or more consecutive days.
The FAA issued the directive after inspectors found compromised air check valves when bringing aircraft out of storage.
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