Unless such failures are extremely remote...
Yeah, but again, who gets to determine that? Does the manufacturer have the option of telling the certification authority, "We believe that a failure of the lubrication system of our new transmission will be extremely remote. The case will never crack, and none of the accessories mounted to it, like...ohhhhh...the TRANSMISSION OIL FILTER, which is under considerable pressure...will never crack and allow oil to leak out!"
Is that how it works?
Because that is apparently how it worked for the S-92.
That "unless such failure are extremely remote" stuff is horrible wording for a regulation.