Airworthiness Directive · Amendment 39-8831 · Twin Commander Aircraft LLC Airplanes
Twin Commander Aircraft LLC Airplanes
This AD applies to Twin Commander Aircraft LLC 500-S, 690B.
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 500S and 690B airplanes. This action requires removing a sample of the wing front spar lower cap (spar cap) material for examination, and, depending upon the results of that examination, inspecting or replacing the Airworthiness Directives: Twin Commander Aircraft Corporation Models 500S and 690B Airplanes . Reports of cracks caused by stress corrosion in the spar cap on several of the affected airplanes prompted this action. The actions specified by this AD are intended to prevent failure of the wing structure caused by cracks in the spar cap.
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
