AD/AC/66 Amdt 8 - Wing Fatigue Life Limitation (Cth)

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES

Twin Commander (Gulfstream/Rockwell/ Aerocommander 500, 600 and 700) Series Aeroplanes

AD/AC/66 Amdt 8

Wing Fatigue Life Limitation 13/89

Applicability: As specified in the Requirement.

Requirement: Retire wing main spar lower cap assembly from service (or modify in accordance with a scheme approved by the Authority) in accordance with the schedule below:

AIRCRAFT MODELS AFFECTED (The straps referred to are wing spar lower cap fatigue life improvement reinforcements)

SPAR CAP RETIREMENT LIFE (Hours' Time in Service)

MTOW of 6750 lb. MTOW of 7400 lb. 500B 30400 - 500B used in low level survey type operations 19900 - 500U with external strap (Pre S/N 1731) 23200 17700 500U with external strap (Pre S/N 1731) and used in low level survey type operations 15900 12100 560F 24100 560F used in low level survey type operations 16300 MTOW of 8000 lb. MTOW of 8500 lb. 680F 17100 - 680FL with external strap (Pre S/N 1731) 17100 11200 680FL with internal strap (S/N 1731 and on) 3900 30000 680FL (P) with external strap (Pre S/N 1731) - 25200 680T 27100 680V, 680W (Pre S/N 1731) with external strap 23500 685 20700 690, 690A 12900 690B 11500 690C, 695 - canted aerodynamic wing tips 11300 690C, 695 - plain tips for total operational life 24800 695A To be Advised.