Airworthiness Directive · Amendment 39-19443 · Electrical power system
Airbus Helicopters Deutschland GmbH Helicopters
This AD applies to Model MBB-BK 117 C-2 and Model MBB-BK 117 D-2 helicopters, certificated in any category, with an overhead panel shock mount assembly part number (P/N) B246M2035102 or P/N B246M2036101 installed.
Note 1 to paragraph (a) of this AD: Helicopters with an MBB-BK117 C-2e designation are Model MBB-BK117 C-2 helicopters.
We are adopting a new airworthiness directive (AD) for Airbus Helicopters Deutschland GmbH (Airbus Helicopters) Model MBB-BK 117 C-2 and MBB-BK 117 D-2 helicopters. This AD requires altering and re- identifying the overhead panel shock mount assembly (shock mount). This AD was prompted by the manufacturer's stress recalculations. The actions of this AD are intended to correct 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.
(1) Within 300 hours time-in-service:
(i) Install a retaining plate on each shock mount by following the Accomplishment Instructions, paragraphs 3.B.2.1. through 3.B.2.4, of Airbus Helicopters Alert Service Bulletin (ASB) MBB-BK117 C-2-24A-015, Revision 0, dated September 14, 2016 (ASB MBB-BK117 C-2-24A-015), or ASB MBB-BK117 D-2-24A-004, Revision 0, dated September 14, 2016 (ASB MBB-BK117 D-2-24A-004), as applicable to your model helicopter.
(ii) Re-identify shock mount P/N B246M2035102 as P/N B246M2035966 and shock mount P/N B246M2036101 as P/N B246M2036966 using permanent ink. When the ink is dry, apply varnish over the P/N.
(iii) Re-install each shock mount.
(2) After the effective date of this AD, do not install a shock mount P/N B246M2035102 or P/N B246M2036101 on any 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.
