S92 dry run
to be fair the S92 was not certified through a specific loop hole as you imply, the rules always only required compliance with the 30 mins dry run time if you could not demonstrate that the chance of oil loss was 'extremely remote'.
Remember that after all it WAS certified by more than one authority using that rule, they were not bent for that aircarft, it's just that every other type managed to meet the 30 min capability regardless of whether thay actually needed to (other types may also have been able to demonstrate to the authorities that loss of lubrication was extremely remote, as was done on the S92, in which case they wouldn't need a 30 mins capability either)
What is surprising is that after at least 2 demonstarted instances where lubrication was lost on the 92 the Cat A certification wasn't pulled, because I would argue that circumstances have shown that the 'extremely remote' chance, isnt!!
anyway I am happy that POTUS will be flying on the second best platform while AW continue to delivery the best one to other heads of state...