AD 2011-17-14
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Agusta | S.p.A. Model A109A and A109AII | Airworthiness Directives; Agusta S.p.A. Model A109A and A109AII Helicopters |
Unsafe Condition
An improperly torqued hub plug, part number 109-0133-18-103, could lead to tail rotor failure 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 the tightening torque value of the hub plug. If between 600 kgcm and 700 kgcm, replace the lock washer and o-ring. If greater than 700 kgcm, replace the hub plug and torque it to the specified range. If less than 600 kgcm, disassemble the tail rotor hub and blades assembly and inspect for damage, replacing any unairworthy parts.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 5 hours time-in-service (TIS) or 8 days, whichever occurs first.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Agusta S.p.A. Model A109A and A109AII helicopters with a certain tail rotor special hub plug installed.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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