Investigation Report
Controlled Helicopter Ditching Following Main Gearbox Lubrication Warnings
AAIB S3-2012 G-REDW
- AAIB
- Investigation Report
- S3/2012
- CorrosionMaterial fatigueMechanical failure
- Helicopter operationsInspection and maintenance
- HelicopterPumpsRotating machinery
- Alarm managementEvacuation, escape and rescue
- Marine waters
Summary
This interim AAIB bulletin examines the controlled ditching of G-REDW following main gearbox lubrication warnings. It reports fatigue fracture of the bevel gear vertical shaft, corrosion and manufacturing inspection findings, and continuing investigation of the emergency lubrication warning. Fracture examination, dimensional measurements, fatigue testing and vibration monitoring inform the ongoing work.
Classifications: Corrosion; corrosion damage.
Classifications: Material fatigue; metal fatigue.
Classifications: Mechanical failure; equipment failure.
Classifications: Helicopter operations; offshore aviation; rotary-wing operations.
Classifications: Inspection and maintenance; asset inspection; equipment maintenance.
Classifications: Helicopter; rotorcraft.
Classifications: Pumps.
Classifications: Rotating machinery; rotating equipment.
Classifications: Alarm management.
Classifications: Evacuation, escape and rescue; EER; escape and rescue.
Classifications: Marine waters.
S3/2012.