Does anyone know if the Altimatic III is listed as optional factory equipment for the Twinco? Rebuilding log records. AD70-15-18 (applicable to the Altimatic III installed in my plane) is only applicable if the unit was installed under an STC. I don't have any STC paperwork in the logs, but also can't find a TCDS to prove it was indeed listed as optional equipment from Piper. I'm assuming it was, but assuming always makes me look like an...
Thanks!
