AD Amdt-39-21656
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Leonardo | S.p.a. | Airworthiness Directives; Leonardo S.p.a. Helicopters |
Unsafe Condition
Two events of uncommanded emergency flotation system (EFS) deployment during flight. The FAA is issuing this AD to address improper design of certain EFS control panels. The unsafe condition, if not addressed, could result in reduced control of the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
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.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 94 hours time-in-service (TIS) or 3 months after the effective date of this AD, whichever occurs first, for helicopters with EFS P/N 3G9560F00111 or 3G9560F00113, with Aerosekur floats with “pyrotechnical” inflation system P/N 3G9560V01051 installed. Within 377 hours TIS or 12 months after the effective date of this AD, whichever occurs first, for helicopters with EFS P/N 3G9560F00111 or 3G9560F00113, with Aerosekur floats with “SMA” inflation system P/N 3G9560V01052 installed. Within 565 hours TIS or 18 months after the effective date of this AD, whichever occurs first, for helicopters with EFS P/N 3G9560F00212 with Aerosekur floats with “fuse disk” inflation system P/N 3G9560V02051 installed.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
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.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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