AD 98-13-28
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Agusta S.p.A. | A109C | Airworthiness Directives; Agusta S.p.A. Model A109C and A109K2 Helicopters |
| aircraft | Agusta S.p.A. | A109K2 | Airworthiness Directives; Agusta S.p.A. Model A109C and A109K2 Helicopters |
Unsafe Condition
Tail rotor blade debonding within a spanwise band from 620.0 mm to 670.0 mm outboard from the blade retention bolt centerline, which could lead to tip fairing loss, increased vibrations, tail rotor assembly loss, and subsequent loss of helicopter control.
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Required Actions
Perform a one-time inspection of each tail rotor blade for debonds using a tapping inspection with an aluminum hammer in the specified spanwise band. Replace blades not meeting allowable debond criteria with an airworthy blade before further flight.
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Compliance Time
before further flight
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Affected Aircraft
Agusta S.p.A. Model A109C and A109K2 helicopters with tail rotor blades part number 109-8132-01-107, serial number A5-all dash numbers.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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