Airworthiness Directive · Amendment 39-18846 · Engine
Airbus Helicopters Deutschland GmbH
Superseded. A later AD replaced this one: AD 2021-06-05. Comply with the one in force.
This AD applies to Airbus Helicopters Deutschland GmbH Model MBB-BK 117 D-2 helicopters with a bushing part number 105-60386 installed, 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 repetitively inspecting the engine mount bushings. This AD was prompted by reports of delaminated and worn bushings. The actions of this AD are intended to prevent 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 50 hours time-in-service (TIS) and thereafter at intervals not to exceed 50 hours TIS:
(1) Visually inspect each engine mount bushing (bushing) for separation of the rubber from the metal or missing rubber.
(2) If any rubber has separated from the metal or if there is missing rubber, inspect the bushing for deformation, corrosion, and mechanical damage.
(i) Replace the bushing with an airworthy bushing if there is any deformation, separation of the rubber from the metal, corrosion, or mechanical damage, or repair the bushing if the deformation, separation of the rubber, corrosion, or mechanical damage is within the maximum repair damage limitations.
(ii) If the inner and outer parts of the bushing are separated with missing rubber, replace the bushing with an airworthy bushing.
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.
