95-20-06
FR doc 95-24604 · 60 FR 52620AD 95-20-06Published 1995-10-10Effective 1995-10-25
Superseded by 97-14-05
Supersedence is read from the Federal Register text of the newer AD — the FAA publishes no structured field for it — and names only ADs held in our index.
Requires inspecting the front spar attachment lugs and the rear spar for fatigue cracks and modifying the vertical fin if cracks are found.
Full official abstract
This amendment adopts a new airworthiness directive (AD) that applies to certain Air Tractor Incorporated (Air Tractor) Models AT- 301, AT-302, AT-400, AT-400A, AT-401, AT-402, AT-501, and AT-502 airplanes. This action requires inspecting the front spar attachment lugs and the rear spar for fatigue cracks and modifying the vertical fin if cracks are found. If no cracks are found, continue repetitively inspecting the area until cracks are found, then incorporate the modification as a terminating action. This action is prompted by two incident reports involving the failure of the front and rear spar attachment lugs of the vertical fin. The actions specified by this AD are intended to prevent in-flight vertical fin structural failure of the front spar attachments and eventually the rear spar attachment, which, if not detected and corrected, could result in loss of directional control and loss of control of the airplane.