Investigation Report
Two EC225 LP Helicopter Ditchings in the North Sea
AAR 2-2014 - Eurocopter EC225 LP Super Pumas, G-REDW and G-CHCN
- AAIB
- Investigation Report
- AAR 2/2014
- CorrosionHuman factorsMaterial fatigueMechanical failure
- Helicopter operationsInspection and maintenance
- HelicopterOperator displays and control interfacesPumpsRotating machinery
- Alarm managementEvacuation, escape and rescueFunctional testingOperating and work procedures
- Upstream oil and gas
- Marine waters
Summary
Combined investigation of two EC225 LP helicopter ditchings in the North Sea in 2012. Corrosion-pit initiated fatigue failures interrupted gearbox oil-pump drive. The report examines stress modelling, welding residual stresses, condition monitoring, misleading emergency lubrication warnings, evacuation and liferaft deployment, and records corrective actions and safety recommendations.
Classifications: Corrosion; corrosion damage.
Classifications: Human factors; human performance; ergonomics.
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: Operator displays and control interfaces.
Classifications: Pumps.
Classifications: Rotating machinery; rotating equipment.
Classifications: Alarm management.
Classifications: Evacuation, escape and rescue; EER; escape and rescue.
Classifications: Functional testing; function test.
Classifications: Operating and work procedures.
Classifications: Upstream oil and gas; oil and gas extraction; upstream petroleum.
Classifications: Marine waters.
AAR 2/2014.