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Old 9th February 2017 | 11:44
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barrow
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Joined: Jan 2007
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From: San Francisco, California, USA
Engine Vibration Measurement
What unit of measurement is used to monitor engine vibration, The aircraft I currently fly is GE turbofan, has a digital, in green 1.0..1.1...1.2 and so on until it reaches 3.9 then turns to an amber 4.0. My question 4.0 what? %? mm?
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