Airworthiness Directive · Amendment 39-10245 · Eurocopter Deutschland GmbH (ECD) Model BO-105A, BO-105C, BO-105S, BO-105LS A-1, and BO-105LS A-3 Helicopters and Eurocopter Canada Ltd. Model BO-105LS A-3 Helicopters
Eurocopter Deutschland GmbH (ECD) Model BO-105A, BO-105C, BO-105S, BO-105LS A-1, and BO-105LS A-3 Helicopters and Eurocopter Canada Ltd. Model BO-105LS A-3 Helicopters
Superseded. A later AD replaced this one: AD 2021-07-08. Comply with the one in force.
Eurocopter Deutschland GmbH Model BO-105A, BO- 105C, BO-105S, BO-105LS A-1, and BO-105LS A-3 helicopters and Eurocopter Canada Ltd. BO-105LS A-3 helicopters, certificated in any category.
This amendment adopts a new airworthiness directive (AD) that is applicable to Eurocopter Deutschland GmbH (ECD) (Eurocopter Deutschland) Model BO-105A, BO-105C, BO-105S, BO-105LS A-1, and BO- 105LS A-3 helicopters; and Eurocopter Canada Ltd. Model BO-105LS A-3 helicopters. This action requires visual inspections for cracks in the ribbed area of the main rotor mast flange (flange). This amendment is prompted by a report of an operator discovering a crack in the flange after experiencing in-flight vibrations. The actions specified in this AD are intended to detect cracks in the flange, which, if not detected, could result in failure of the flange and subsequent loss of control of the helicopter.
