AD FAA-2013-1057

We are adopting a new airworthiness directive (AD) for all M7 Aerospace LLC Models SA226-AT, SA226-T, SA226-T(B), SA226-TC, SA227-AC (C-26A), SA227-AT, SA227-BC (C-26A), SA227-CC, SA227-DC (C-26B), SA227- TT, SA26-AT, and SA26-T airplanes. This AD was prompted by reports of airplanes with multiple fatigue cracks in the FS 69.31 front pressure bulkhead. This AD requires repetitively inspecting (visually) the FS 51.31 front pressure bulkhead on SA26 series airplanes and FS 69.31 front pressure bulkhead on SA226 and SA227 series airplanes for cracks, and repairing any cracked bulkhead; this AD also requires reporting certain inspection results to M7 Aerospace LLC. We are issuing this AD to correct the unsafe condition on these products.