Investigation Report
EC225 Emergency Gearbox Lubrication Continued Despite Failure Warning During Testing
AAIB S5-2012 G-REDW
- AAIB
- Investigation Report
- S5/2012
- Mechanical failure
- Helicopter operations
- HelicopterPumpsRotating machineryValve
- Alarm managementFunctional testing
- Marine waters
Summary
This tentative AAIB investigation bulletin examines the EC225 LP emergency gearbox lubrication system following G-REDW’s ditching. Component tests indicated that lubrication continued despite a failure warning. Analysis identified a possible pressure-sensor tolerance issue, and the bulletin recommends a design review to ensure accurate crew indications.
Classifications: Mechanical failure; equipment failure.
Classifications: Helicopter operations; offshore aviation; rotary-wing operations.
Classifications: Helicopter; rotorcraft.
Classifications: Pumps.
Classifications: Rotating machinery; rotating equipment.
Classifications: Valve; valves.
Classifications: Alarm management.
Classifications: Functional testing; function test.
Classifications: Marine waters.
S5/2012.