EASA AD CF-2024-42
Dec 19, 2024Main Rotor Drive System — Cracking of Transmission Oil Check Valve
Canadian Airworthiness Directive CF-2024-42 addresses cracking issues in the transmission oil check valve part number 209-062-520-001 used on Bell Textron Canada Limited model 427 helicopters, serial numbers 56001 through 56084, 58001, and 58002. The directive mandates inspections, measurements, and eventual replacement of affected check valves to prevent transmission failure. It also prohibits installation of affected parts on these helicopters.
- Bell 427