Airworthiness directives › 2025-13-09
AD 2025-13-09 Airworthiness Directives; Airbus Helicopters
Models named: AS-365N2, AS 365 N3, EC 155B, EC155B1, SA-365N, SA-365N1. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to Airbus Helicopters Model AS-365N2, AS 365 N3, EC 155B, EC155B1, SA-365N, and SA-365N1 helicopters, certificated in any category.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Except as specified in paragraph (h) of this AD: Comply with all required actions and compliance times specified in, and in accordance with, European Union Aviation Safety Agency AD 2024-0110, dated June 6, 2024 (EASA AD 2024-0110).
Unsafe condition
This AD was prompted by reports of two occurrences of loss of tightening torque between the upper ball bearing end and the main rotor (MR) servo-control. The FAA is issuing this AD to detect loss of tightening torque. The unsafe condition, if not addressed, could result in disconnection between the upper ball bearing end and the MR servo-control, and consequent loss of control of the helicopter.
Affected ADs
None.
Read the original on the Federal Register →
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1