Summary
We propose to adopt a new airworthiness directive (AD) for all M7 Aerospace LLC Models SA26-AT, SA226-T, SA226-AT, SA226-T(B), SA226- TC, SA227-AT, SA227-TT, SA227-AC (C-26A), SA227-BC (C-26A), SA227-CC, and SA227-DC (C-26B) airplanes. This proposed AD was prompted by information that the airplane flight manual (AFM) does not provide adequate guidance in the handling of engine failures, which may lead to reliance on the negative torque system (NTS) for reducing drag. This condition could lead the pilot to not fully feather the propeller with consequent loss of control. This proposed AD would require inserting updates into the airplane flight manual (AFM) and/or the pilot operating handbook (POH) that will clearly establish that the NTS is not designed to automatically feather the propeller but only to provide drag protection. We are proposing this AD to correct the unsafe condition on these products.