Airworthiness Directive · Amendment 39-9379 · Twin Commander Aircraft Corporation 680, 681, 690, and 695 Series Airplanes
Twin Commander Aircraft Corporation 680, 681, 690, and 695 Series Airplanes
The following airplane models and serial numbers, certificated in any category. Models Serial No. 680T and 680V............................... 1473 through 1720. 680W........................................ 1721 through 1850. 681......................................... 6001 through 6072. 690......................................... 11001 through 11079. 690A........................................ 11100 through 11344. 690B........................................ 11350 through 11566. 690C........................................ 11600 through 11735. 690D........................................ 15001 through 15042. 695......................................... 95000 through 95084. 695A........................................ 96000 through 96100. 695B........................................ 96201 through 96208.
This amendment adopts a new airworthiness directive (AD) that applies to certain Twin Commander Aircraft Corporation (Twin Commander) 680, 681, 690, and 695 series airplanes. This action requires installing a placard warning the pilot to observe turbulent air penetration speeds. Two accidents involving Model 690 airplanes where the affected airplanes encountered turbulence while descending at high speeds prompted this action. The actions specified by this AD are intended to prevent structural damage to the airplane caused by excessive turbulence, which could result in loss of control of the airplane.
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
