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Old 18th Sep 2018, 07:14
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Goldenrivett
 
Join Date: Jan 2014
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Whay would be interesting to see in simulator in cruise if both packs go off & outflow valves fully closed, how long does it take for depressurization.
See Bergerie1 14 April 2018
Cabin leak rates / decompression
"747-100 series UK CAA Certificate of Airworthiness Air Test pressurisation leak rate test, para 7.2.6. At 30,000ft, I quote:-

'With normal cabin diff. put GALLEY/LAV FAN ON and switch all A/C packs to OFF. Record leak rate over 1 minute; 750' maximum. Restore normal pressurisation."
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