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Old 22nd Feb 2020, 16:53
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b.kahraman2011
 
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Question B737 APU BLEED - FCOM rev23
Hi Guys,

Im new around here and in air. I have an question about B737 APU BLEED in FCOM rev23. According to last revision, it says that to give APU bleed air after 2 full min. I wonder what is the technical reason that they increased the limit ( except the reason to extend the service life of APU) ?

Thank you guys for answers

Have a safe flights.

FCOMperate the APU for two full minutes before using it as a bleed air source. This two minutes stabilization is recommended to extend the service life of the APU.
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