AD 2021-20-12
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aviat | Various | Airworthiness Directives; Leonardo S.p.a. Helicopters |
Unsafe Condition
Failure of an Emergency Flotation System (EFS) float compartment to inflate during maintenance of the EFS, which could result in partial inflation of an EFS float during an emergency landing on water and subsequently preventing a timely egress from the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspecting each EFS supply hose and depending on the results, re-identifying or removing the EFS supply hose from service, as specified in an EASA AD. The work must be accomplished by a mechanic that meets the requirements of 14 CFR part 65 subpart D.
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Compliance Time
Within 100 hours time-in-service
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Affected Aircraft
Leonardo S.p.a. Model AB139, AW139, AB412, and AB412 EP helicopters, with an affected part as identified in European Union Aviation Safety Agency (EASA) AD 2019-0311, dated December 19, 2019 (EASA AD 2019-0311), installed.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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