"From AC39-7D"

Please be very careful. "AC"s are not regulatory. Operating limitations and AD's are regulatory. In the world of the FAA you must follow the op lims and AD's over AC's. The FAA, like the IRS, does not always give correct advice.

So post #6 is correct, not #7 and #8. Unfortunately, you have to parse this stuff like a lawyer.

Best of luck,

Wes
N78PS