Originally Posted by PDR1
Of course the relevance of an FAA requirement for a british-registered airship under test in the UK is left as an exercise for the reader...
The current version of EU 748/2012 does not contain any regulations about the design of airships, other than those of less than 1000 m^3 (for gas airships). But I may have overlooked something of course. The FAA does have a framework in place for certifying an airship of this size, of interest is that these regulations are based on the Transport Airship Airworthiness Requirements developed in Europe. With only a small number of airships of this size around, I wouldn't be surprised if any European or US projects are all using the same requirements, and with the FAA ones being based on the EU ones, they will most likely say the same thing about auto-deflation.
https://www.faa.gov/aircraft/air_cer...airships_regs/
Transport Airship Requirements | The Airship Association