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Old 14th Apr 2018, 05:42
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Bergerie1
 
Join Date: Apr 2009
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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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