Horn AD

[Jim Golden]

Kristin and Alan, you guys were right and I was wrong. Gotta lay off the eggnog.... I just reread the article in the magazine and it's exactly what Kristin said. If you apply for the AMOC, the Aussie Horn makes it all go away. If you don't apply for it, then it's treated like a new Piper Horn and you tear it apart after 1000 hours and then every 500 thereafter (or ten years and five).

Looks like the best bet is to just get the Aussie horn, apply for and get the AMOC, and call it a day. Those guys did do a really nice looking job of machining on those. They look sharp.

Take care,
Jim

[Michael Bryant]

Could someone please explain to me why the Aussie horn doesn't make the AD go away without being declared an AMOC. Correct me if I am wrong but isn't the Horn AD part number specific.

To me (not an A&P or IA), it would be like a part number specific AD on the Piper cowling and everyone with the Eagle XP or the LoPresti Cowling needing to comply. Or even better, I have upgraded from Generators to Alternators with an STC. If a part number specific AD comes out for the generators originally installed am I required to comply even though I now have an STC and the original part number is no longer installed on my a/c?

I am confused, since the specific Piper part number is not installed on aircraft with the Aussie horn STC, why is compliance required?

Michael