----discovered AC43 for the first time.
Jaba,
Strange, every amateur builder I know has his or her hard copy of AC43.13 A & B as the bible. As for LAMEs not knowing about it?? It's incorporated in just about any CAR 30 Maintenance Approval docs. that I have dealt with ----- although it (and much else similar) is now automatically "approved data" ---- see the instrument, too hard for me to find the reference this late in the evening.
Tootle pip!!