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Friday, March 29, 2024 | Back issues
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FAA Relies on Manuals|to Prevent Dead Engines

WASHINGTON (CN) - "Several in-flight engine flameouts, including multiple dual engine flameouts" due to ice crystals forming in the engines of certain McDonnell Douglas Corporation MD-11 airplanes, have prompted the Federal Aviation Administration to require revisions to its flight manual.

Model MD-11 and MD-11F airplanes with General Electric CF6-80C2 engines will have to rely on changes in the manual when going through icy conditions, while the agency pursues a more permanent solution.

The changes specify procedures to be used during descent through conditions that create ice crystals in the engines: "Before reducing thrust for descent when icing conditions are present, the ENG IGN OVRD switch and the ENG, WING, and TAIL ANTI-ICE switches all must be in the ON position. When icing conditions are no longer present or anticipated, place the ENG IGN OVRD switch and the ENG, WING, and TAIL ANTI-ICE switches in the OFF position.''

MD-11s often are used for long distance cargo runs, such as those run by AmEx Express.

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