for Eastwood
For clarity the requirement states that it must have 30 minutes dry run capability unless the likelihood of total oil loss was extremely improbable.
In the case of the S92 the safety case determined that it was extremely improbable and therefore did not require a 30 min capability.
therefore at the time of the accident the S92 was correctly certificated.
in hindsight asking if the safety case is adequate is a whole different question
DM