Airworthiness Directive · Amendment 39-19106 · Autopilot system
Airbus Helicopters Deutschland GmbH Helicopters
This AD applies to Airbus Helicopters Deutschland GmbH (Airbus Helicopters) Model MBB-BK 117 D-2 helicopters, certificated in any category.
We are adopting a new airworthiness directive (AD) for Airbus Helicopters Deutschland GmbH (Airbus Helicopters) Model MBB-BK 117 D-2 helicopters. This AD requires amending the rotorcraft flight manual to establish a minimum airspeed limitation for the autopilot cruise height mode. This AD is prompted by two reports of uncommanded helicopter climbs and descents. The actions of this AD are intended to address an unsafe condition on these products.
You are responsible for performing each action required by this AD within the specified compliance time unless it has already been accomplished prior to that time.
Within 10 hours time-in-service, revise the Operating limitations section of the Rotorcraft Flight Manual by adding the information in Figure 1 to paragraph (e) of this AD under Autopilot Limitations. Inserting Airbus Helicopters BK117 D-2 Flight Manual Temporary Revision No. 1, dated March 28, 2017, or Airbus Helicopters BK117 D-2 (Helionix Step 2) Flight Manual Temporary Revision No. 1, dated March 28, 2017, into the RFM is acceptable for compliance with this AD.
| Operating limitations of the autopilot | |
| Minimum airspeed with CRHT mode engaged | 40 kt |
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.
