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Old 12th Jul 2010, 14:41
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alosaurus
 
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737 NG Derate / Assumed temp benefits

My company prefers us to use a combination of Derate and assumed temp to take off with the minimum N1 (EGT).

I understand the long term fuel reduction benefits of this and the extended engine life /reduced maintenance costs but is there any evidence that lower take off power reduces EFATOs.

The reason I ask is that (even on a dry runway with no crosswind) many of the guys refuse to assume after a derate (the feeling seems to be that you are taking an uneccessary risk by keeping the aircraft on the concrete longer than normal).

Thanks in advance
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