AD 2005-09-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Agusta | S.p.A. Model A109E | Airworthiness Directives; Agusta S.p.A. Model A109E Helicopters |
Unsafe Condition
Fatigue failure of the bolts that secure the transmission rear support fittings to the helicopter, which could lead to loss of control.
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Required Actions
Visually inspect each main transmission support fitting attachment bolt (part number NAS625-14) for a fracture, crack, or looseness within 5 hours time-in-service (TIS), and then at intervals not exceeding 10 hours TIS until a torque inspection is completed. If a fracture or crack is found in any bolt, replace all 4 bolts in the fitting with airworthy bolts before further flight. If looseness is found, inspect all 16 bolts to determine torque. If torque is not within 11.3-15.8 Nm (100-140 inch-pounds), replace all 4 bolts in the fitting with airworthy bolts before further flight. Within 25 hours TIS, inspect each bolt's torque and replace any bolts outside the acceptable range with airworthy bolts.
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Compliance Time
Within 5 hours time-in-service (TIS) for initial inspection, with subsequent inspections at intervals not exceeding 10 hours TIS, and a final torque inspection within 25 hours TIS.
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Affected Aircraft
Agusta S.p.A. Model A109E helicopters, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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