Originally Posted by
cats_five
It would certainly look very silly on the claim form & AAIB report.
Why would you claim or confess that? Unless the failure was already recorded in the aircraft logbook prior to the flight, it's difficult to prove that the pilot took off with a pre-existing malfunction.
Technically, this malfunction can be detected only before engine start, so if your electric pump fails on takeoff, you won't notice it and will happily cruise around in mountains, rocky deserts, and the oceans without knowing that the assumed redundancy doesn't protect the engine anymore.