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25th October 2016 | 00:35

#11 (permalink)

galaxy flyer

Joined: Dec 2002

: ATP+Mil

Posts: 3,985

Likes: 568

From: Where the Quaboag River flows, USA

Not a 747 guy, but one reason I heard (recommended for my current stead) is opening the door allows a cold soaked APU to warm enough to help the start.

GF

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