Airworthiness Directive · Amendment 39-21210 · Rotors flight control
Airbus Helicopters Deutschland GmbH Helicopters
This AD applies to Airbus Helicopters Deutschland GmbH Model MBB-BK 117 D-2 helicopters, certificated in any category, with a serial number up to 20126 inclusive, excluding serial numbers 20109, 20119, and 20124, and with any of the following installed:
(1) Longitudinal trim actuator part number (P/N) 418-00878-001,
(2) Lateral trim actuator P/N 418-00878-051, or
(3) Yaw trim actuator P/N 418-00879-001.
The FAA is adopting a new airworthiness directive (AD) for certain Airbus Helicopters Deutschland GmbH Model MBB-BK 117 D-2 helicopters. This AD was prompted by the discovery that certain longitudinal trim actuators, lateral trim actuators, and yaw trim actuators, which are certified for installation on MBB-BK 117 C-2 helicopters, were erroneously listed as eligible for installation on MBB-BK 117 D-2 helicopters. This AD requires removing the affected parts from service and prohibits installing the affected parts on MBB- BK 117 D-2 helicopters. The FAA is issuing this AD to address the unsafe condition on these products.
(1) Within 300 hours time-in-service, remove from service any longitudinal trim actuator P/N 418-00878-001, lateral trim actuator P/N 418-00878-051, and yaw trim actuator P/N 418-00879-001.
(2) After the effective date of this AD, do not install longitudinal trim actuator P/N 418-00878-001, lateral trim actuator P/N 418-00878-051, or yaw trim actuator P/N 418-00879-001 on any Model MBB-BK 117 D-2 helicopter.
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.
