Airworthiness Directive · Amendment 39-18392 · Cabin equipment/furnishings
Airbus Helicopters Deutschland GmbH Helicopters
This AD applies to Model MBB-BK 117 C-2 and MBB-BK 117 D-2 helicopters with a Goodrich hoist damper unit, part number (P/N) 44307-480, 44307-480-1, or 44307-480-2 installed, certificated in any category.
We are superseding airworthiness directive (AD) 2014-13-01 for Airbus Helicopters Deutschland GmbH (Airbus Helicopters) Model MBB-BK 117 C-2 helicopters with a certain Goodrich rescue hoist damper unit (damper unit) installed. AD 2014-13-01 required repairing or replacing the damper unit or deactivating the rescue hoist. AD 2014-13-01 was prompted by a report of an uncommanded detachment of a damper unit from the cable. This new AD retains the optional requirement of deactivating the rescue hoist, expands the applicability, and requires either replacing or modifying the damper unit with a newly developed single- piece retainer. These actions are intended to prevent the hoist damper unit detaching from the cable resulting in loss of an external load or person from the helicopter hoist and injury to persons being lifted by the hoist.
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.
Before the next hoist operation, comply with paragraph (f)(1), (f)(2), or (f)(3) of this AD:
(1) Replace the split retainers and re-identify each hoist damper unit in accordance with the Accomplishment Instructions, paragraph 3.B.1, of Airbus Helicopters Emergency Alert Service Bulletin (ASB) No. ASB MBB-BK117 C-2-85A-041, Revision 4, dated February 12, 2015, or Emergency ASB No. ASB MBB-BK117 D-2-85A-002, Revision 1, dated February 12, 2015, as applicable to your model helicopter; or
(2) Replace each hoist damper unit with a unit that has been repaired as required by paragraph (f)(1) of this AD; or
(3) Deactivate the rescue hoist system.
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.
