Airworthiness Directive · Amendment 39-8835 · Twin Commander Aircraft LLC Airplanes
Twin Commander Aircraft LLC Airplanes
This AD applies to Twin Commander Aircraft LLC 500, 560-A, 560-E, 680, 680-E, 720.
The models as the FAA's AD index lists them. The serial ranges, installed parts and exceptions are in the AD itself: read it at the FAA.
This amendment adopts a new airworthiness directive (AD) that applies to certain Twin Commander Aircraft Corporation (Twin Commander) Models 500, 560A, 560E, 680, 680E, and 720 airplanes. This action requires inspecting the wing front spar lower cap (spar cap) for interference, fretting, or corrosion between the firewall flange and spar cap flange at Wing Station (WS) 96, and clearing any interference, repairing any fretting or corrosion damage, and replacing any cracked spar cap. Reports of two of the affected airplanes having cracked spar caps at WS 96 prompted this action. The actions specified by this AD are intended to prevent failure of the wing structure caused by a cracked spar cap at WS 96.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Aircraft
