Main Rotor Drive — Oil Cooling Fan Hub — Inspection / Replacement
- Published
- Effective
- Deadline
- Replaces
- 2022-0006R1
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of EC 155 B1 helicopters must inspect the affected oil cooling fan hub within 55 flight hours after the effective date or installation, and repeat inspections every 55 flight hours. If cracks are found, inspections must increase to every 10 flight hours and replacement of the part must occur within 50 flight hours. Cracks outside attachment screws require immediate replacement before next flight. Only serviceable parts may be installed from the effective date onward.
Summary
EASA Airworthiness Directive 2022-0006R2 is an official regulatory document addressing the inspection and replacement of the main gearbox oil cooling fan hub on Airbus Helicopters EC 155 B1 models. It mandates repetitive inspections and corrective actions for the affected part, part number 365A32-9204-01, to prevent potential failure that could lead to loss of lubrication and reduced helicopter control.
What changed
This revision removes a previously allowed 5 flight hour tolerance for inspections and extends the standard compliance time and inspection intervals to 55 flight hours. It also updates inspection and replacement requirements for cracked parts and clarifies installation rules for serviceable parts on all EC 155 helicopters.
Why it matters
This directive is critical for operators and maintenance organizations to prevent failure of the oil cooling fan hub, which could cause damage to helicopter systems and loss of monitoring functions. Compliance ensures continued airworthiness and safety by detecting cracks early and replacing affected parts promptly, reducing the risk of in-flight failures.
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
Get the next one by email
New ADs and bulletins for Airbus Helicopters SA, Helicopters AS 365, Helicopters EC 155 and Helicopters EC 155 B1, summarized like this page, every Monday.