AD 79-02-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Agusta S.p.A. | A109 | Airworthiness Directives; Costruzioni Aeronautiche Model A109 and A109A Helicopters |
| aircraft | Agusta S.p.A. | A109A | Airworthiness Directives; Costruzioni Aeronautiche Model A109 and A109A Helicopters |
Unsafe Condition
Cracks in the tail rotor drive shaft hanger bearing support bracket, P/N 109-0370-02-1, could lead to tail rotor failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Within 10 hours time in service after the effective date, inspect the bracket daily for cracks per Agusta Bollettino Tecnico No. 109-2. Replace cracked brackets with same P/N or new P/N 109-0370-12-1 before further flight. By 100 hours time in service, replace all P/N 109-0370-02-1 brackets with P/N 109-0370-12-1 to discontinue daily inspections.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 10 hours time in service after the effective date of this AD, and thereafter following the last flight of each day in which the helicopter is operated
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Affected Aircraft
Costruzioni Aeronautiche Giovanni Agusta Model A109 and A109A helicopters, serial numbers 7109 and below, with tail rotor drive shaft hanger bearing bracket P/N 109-0370-02-1
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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