wrote:

Keep in mind that there's an AD against this engine with the hollow crank.

AD 98-2-8.

It
involves removing that plug and inspecting for crankshaft corrosion on the inside. I
don't remember how often it needs to be done, ....

The first inspection must be done within 10 years of the original ship date,
1,000 hours from date of the last overhaul, or six months from issuance of the
AD. After that, every five years. Urethabond can also be applied during the
inspection. If this is done, the crank never has to be inspected for this AD
again.

... but if it was replaced recently that
could be the cause of the "new" leak.

Sure could.

George Patterson
The desire for safety stands against every great and noble enterprise.