Steve Pierce
BENEFACTOR
Graham, TX
It would seem that an STC'd part would eliminate the AD, as it is no longer the factory part the AD addresses. I can see the FAA having a mandatory inspection on the STC, doing what the STC is thought.
An example: If you have a stock muffler, you have an AD. If you run Atlee's you don't.
We really need to be thankful guys like Bill, Joe and so many others are out there finding fixes and making parts for our old planes.
Here is the AMOC for the Atlee muffler. Sutton has one as well.