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Thread: B737 (NG) PTU
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Old 14th June 2006 | 14:55
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BOAC
Per Ardua ad Astraeus
 
Joined: Mar 2000
Posts: 18,575
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From: UK
The Classic as well - if B system engine driven pump/number 2 engine fails, the PTU uses A system pressure to power a pump which pressurises B system fluid for flap/slat opertaion. Flaps extended but less than 15 and airborne only.
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