AD 2009-19-51
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aviat | Various | Airworthiness Directives; Agusta S.p.A. (Agusta) Model AB139 and AW139 Helicopters |
Unsafe Condition
Debonding of tail panels could exceed a certain limit, leading to failure of the tailboom and subsequent loss of control of the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect tail panels for debonding. If debonding exceeds a specified limit, repair the tailboom. Remove the strake if bond separation is found. Measure the debonded area and repair the tailboom if the area exceeds the required measurement.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 50 hours time-in-service (TIS) for certain serial-numbered helicopters, or within 25 hours TIS or 30 days, whichever occurs first, for other serial-numbered helicopters.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Agusta S.p.A. Model AB139 and AW139 helicopters, as specified by serial numbers.
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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