by Chris Kuyoth » Fri Sep 17, 2010 4:04 pm
Rick,
My understanding is that while it appears that the Aussie horn will terminate the repetitive inspection criteria of the Piper service bulletin (because it is a different part), there is no guarantee that is would terminate any repetitive actions specified in the yet-to-be-issued AD, though it seems highly likely.
My IA explained to me that it is up to the FAA to determine if an alternate method of compliance is acceptable as a terminating action to an AD. In other words, the FAA may determine in any future AD, that the Aussie horn should be inspected the same as a Piper horn if sufficient evidience does not support otherwise.
Chris