AD 2025-13-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus | Helicopters Model AS-365N2 | Airworthiness Directives; Airbus Helicopters |
Unsafe Condition
Loss of tightening torque between the upper ball bearing end and the main rotor (MR) servo-control, which could result in disconnection between these two parts and consequent loss of control of the helicopter.
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Required Actions
Inspect the tightening torque of the upper ball bearing end of each MR servo control, and depending on the results, take corrective action, which includes applying torque, lockwire, and sealing compound to the upper ball bearing end of the MR servo-control, inspecting the ball bearing end of the MR-servo control, replacing a ball bearing end, inspecting the upper end fitting of the MR-servo control, and replacing the MR servo-control.
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Compliance Time
Within 50 flight hours
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Affected Aircraft
Airbus Helicopters Model AS-365N2, AS 365 N3, EC 155B, EC155B1, SA-365N, and SA-365N1 helicopters.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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