Tail Rotor – Double Bearing – Inspection / Replacement
Superseded. Comply with 2020-0078, which replaces this document.
- Published
- Effective
- Deadline
- Replaces
- 2019-0267-E
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must perform repetitive inspections of the tail rotor gearbox chip detector according to the specified intervals based on helicopter group classification and flight hours. Affected double bearings must be replaced before exceeding 610 flight hours or within 110 flight hours after the directive's effective date, whichever is later. Close monitoring procedures and corrective actions outlined in the applicable Airbus Helicopters Service Bulletins must be followed without delay.
Summary
EASA Airworthiness Directive 2019-0267R1 is an update addressing the inspection and replacement requirements for the double bearing installed on the tail rotor gearbox of Airbus Helicopters SA 365, AS 365, and EC155 models. This directive applies to all serial numbers of these helicopter types and focuses on preventing loss of yaw control due to bearing degradation. It mandates repetitive inspections of the tail rotor gearbox chip detector and timely replacement of affected double bearings.
What changed
EASA Airworthiness Directive 2019-0267R1 revises the original Emergency AD 2019-0267-E by extending the threshold for initial replacement of the double bearing on Group 1 helicopters. It clarifies inspection intervals and maintenance procedures while maintaining the requirement for close monitoring and replacement to mitigate the risk of bearing failure. The revision also corrects the reference to the superseded AD number.
Why it matters
This directive is critical for aviation professionals as it addresses a safety issue that could lead to loss of yaw control in affected helicopters, posing a significant flight risk. Operators and maintenance organizations must ensure compliance to maintain airworthiness and avoid potential accidents. The directive provides clear inspection and replacement guidelines to manage the risk of accelerated bearing degradation effectively.
More for Airbus Helicopters SA
All 58- EASA AD 2026-0195Tail Rotor Drive – Tail Gear Box Control Rod Bearings – Replacement / Life LimitationOct 13, 2026
- EASA PAD 26-105Tail Rotor Drive – Tail Gear Box Control Rod Bearings – Replacement / Life LimitationSep 11, 2026
- EASA AD 2026-0118Rotors Flight Control – Tail Rotor Actuator – InspectionJun 22, 2026
- EASA AD 2026-0029Tail Rotor Drive — Tail Gear Box Input Flange — Functional ChecksFeb 12, 2026
- EASA PAD 26-017Powerplant — Engine Firewalls — Modification
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