Investigation Report
AW139 Erroneous Warnings and Lost Indications During Offshore Flight
AgustaWestland AW139, G-CHCV 10-10
- AAIB
- Investigation Report
- CorrosionStructural and asset integrity
- Helicopter operationsInspection and maintenance
- HelicopterOperator displays and control interfaces
- Alarm management
- Marine waters
Summary
An AAIB investigation examines erroneous warnings and lost indications on AW139 G-CHCV over the North Sea, alongside similar incidents. Corrosion in an avionics module was linked to unfiltered, non-conditioned cooling air. Laboratory examination and water-spray testing explored the failures; the report recommends mandating a service bulletin for short-nose aircraft.
Classifications: Corrosion; corrosion damage.
Classifications: Structural and asset integrity; asset integrity; structural integrity.
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: Alarm management.
Classifications: Marine waters.