Airworthiness directives › 2026-02-01
AD 2026-02-01 Airworthiness Directives; Airbus Helicopters Deutschland GmbH Helicopters
Models named: EC135P3, EC135T3. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to Airbus Helicopters Deutschland GmbH (AHD) Model EC135P1, EC135P2, EC135P2+, EC135P3, EC135T1, EC135T2, EC135T2+, EC635T2+, and EC135T3 helicopters, certificated in any category. Note 1 to paragraph (c): Helicopters with an EC135P3H designation are Model EC135P3 helicopters and helicopters with an EC135T3H designation are Model EC135T3 helicopters.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Except as specified in paragraphs (h) and (i) of this AD: Comply with all required actions and compliance times specified in, and in accordance with, European Union Aviation Safety Agency AD 2023-0197, dated November 10, 2023 (EASA AD 2023-0197).
Unsafe condition
This AD was prompted by reports of ruptured and deformed flexible couplings. The FAA is issuing this AD to detect axial displacement of the tail rotor drive shaft that exceeds allowable limits. The unsafe condition, if not addressed, could result in cracks and extensive deformation of flexible couplings, high vibration of the tail rotor drive shaft, and consequent reduced control of the helicopter.
Affected ADs
None.
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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