EASA AD 2022-0006R2
Main Rotor Drive — Oil Cooling Fan Hub — Inspection / Replacement
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.
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.
Your fleet's weekly compliance brief
AI-summarized regulatory changes, compliance deadlines, and action items — filtered to your aircraft, every Monday.
AI-generated summary from official EASA source document. Always verify against the original.