Re: ETOPS Question

Date:         22 Nov 97 20:41:26 
From:         rdd@netcom.com (Robert Dorsett)
Organization: Netcom Online Communications Services (408-241-9760 login: guest)
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In article <airliners.1997.2651@ohare.Chicago.COM> rlawler@isd.net writes:
>Steve Lacker wrote:
>
>One other point.  The APU cannot be operated in the air on the
>B747-100/200 series...of running during takeoff, the APU on the B747-400
>can be used upto approx 15-20,000 ft.  Its doubtful it can be started
>in the air.

That is not correct.  There are can be altitude limitations on APU use,
but on some -200 variants at least, APU use is possible under 20,000',
and bleed air is available under 15,000'.

There will be a big placard reading "APU CERTIFIED FOR IN-FLIGHT START
AND OPERATION" if this is feasible.

--
Robert Dorsett                         Moderator, sci.aeronautics.simulation
rdd@netcom.com                         aero-simulation@cactus.org

           "Bother," said Pooh when his engine quit on take-off.