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The inquiry in the CPA magazine was from my mech who just did my airplane a few months ago. We did not remove the aux tanks for the inspection. As I recall (sitting here in front of the TV), Tom Carr, a Skymaster guru, responded that it's a little lost to Cessna history how the necessity for removal of the aux tanks got started but the SB spells out a method to comply with the AD without removal of the tanks. I think the total bill was around $4K and change with all labor and bringing in the NDI guys with the machine. I should add that a small crack in one filler fitting was found when the main tanks were pulled - that repair is included in the $4K.
My bird was done at about 4700 hours (since I was about to start our heavy survey season). No spar issues and no corrosion inside the wing. Good news since most of our work is low altitude over salt water with a fair amount of yanking and banking.
Joe
N337NE
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