Dave S wrote:
http://www.avweb.com/eletter/archive...ll.html#192405

The FAA dinged an A&P for not complying with a "mandatory" SB prior to
returning an aircraft to service in a part 91 environment. The NTSB
upheld it, breaking with decades of precedent.

Hmmm. I always thought there was no such thing as a "mandatory" service
bulletin.

I guess that mean those "mandatory" service bulletins we've been seeing
for years from Parker Hannafin regarding replacement of their vacuum
pumps after a couple hundred hours of service are now *regulatory* ???

-(

Jake Brodsky
Cessna Cardinal N30946 Based @ FME