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Old 9th Jun 2011, 05:31
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Graybeard
 
Join Date: Nov 2006
Location: SoCalif
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Old Airplane with Control Problem

About ten years ago, the Roll Channel went to sleep on an Evergreen 747-1 cargo plane one night over Canada enroute KJFK-KANC. It was well beyond 30 degrees roll when the pilot caught it. They went something like 1.06 M in the recovery.

SperryWell could find nothing wrong with the roll channel, so it became a boat anchor. EV installed 30 degree bank limit alarms in the fleet after that.
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