Airworthiness Directive · Amendment 39-21656 · Emergency flotation section
Leonardo S.p.a. Helicopters
This AD applies to Leonardo S.p.a. Model AB139 and AW139 helicopters, certificated in any category, with an emergency flotation system (EFS) control panel part number (P/N) 3G9560V00556 (for use with night vision goggle) or 3G9560V00557 (standard) installed.
The FAA is adopting a new airworthiness directive (AD) for certain Leonardo S.p.a. Model AB139 and AW139 helicopters. This AD was prompted by two events of uncommanded emergency flotation system (EFS) deployment during flight. This AD requires replacing certain part- numbered EFS control panels and prohibits installing them. The FAA is issuing this AD to address the unsafe condition on these products.
(1) At the following compliance time, replace EFS control panel P/N 3G9560V00556 or 3G9560V00557 with EFS control panel P/N 3G9560V00559 or 3G9560V00558, respectively:
(i) For helicopters with EFS P/N 3G9560F00111 or 3G9560F00113, with Aerosekur floats with “pyrotechnical” inflation system P/N 3G9560V01051 installed, within 94 hours time-in-service (TIS) or 3 months after the effective date of this AD, whichever occurs first.
(ii) For helicopters with EFS P/N 3G9560F00111 or 3G9560F00113, with Aerosekur floats with “SMA” inflation system P/N 3G9560V01052 installed, within 377 hours TIS or 12 months after the effective date of this AD, whichever occurs first.
(iii) For helicopters with EFS P/N 3G9560F00212 with Aerosekur floats with “fuse disk” inflation system P/N 3G9560V02051 installed, within 565 hours TIS or 18 months after the effective date of this AD, whichever occurs first.
(2) As of the effective date of this AD, do not install EFS control panel P/N 3G9560V00556 or 3G9560V00557 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.
Aircraft
