Investigation Report
EC225 Controlled Ditching Following Gearbox Lubrication Warnings
S6-2012 EC225 LP Super Puma G-CHCN 12-12
- AAIB
- Investigation Report
- S6/2012
- Mechanical failureStructural and asset integrity
- Helicopter operations
- HelicopterPumpsRotating machinery
- Evacuation, escape and rescueOperating and work procedures
- Marine waters
Summary
This preliminary AAIB investigation describes the controlled ditching of G-CHCN following gearbox lubrication warnings. Examination identified a circumferential shaft crack that interrupted oil pump drive. Recorded vibration indicators had exceeded alert thresholds on earlier flights. Occupants were rescued without injury, and airworthiness monitoring requirements were under review.
Classifications: Mechanical failure; equipment failure.
Classifications: Structural and asset integrity; asset integrity; structural integrity.
Classifications: Helicopter operations; offshore aviation; rotary-wing operations.
Classifications: Helicopter; rotorcraft.
Classifications: Pumps.
Classifications: Rotating machinery; rotating equipment.
Classifications: Evacuation, escape and rescue; EER; escape and rescue.
Classifications: Operating and work procedures.
Classifications: Marine waters.
S6/2012.