Investigation Report
Sea King Accident During Hover Check
Sikorsky S-61N Sea King, G-ATBJ 03-20
- AAIB
- Investigation Report
- CorrosionMechanical failure
- Helicopter operationsInspection and maintenance
- Helicopter
- Functional testingOperating and work proceduresPre-use checks
Summary
AAIB investigation of a Sea King accident during a hover check at Marchwood. Corrosion seized the swashplate spherical bearing following prolonged inactivity during sea transport. Maintenance and pre-flight checks failed to detect the restriction. Recorder analysis, CCTV and component examinations informed findings and changes to daily inspections.
Classifications: Corrosion; corrosion damage.
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: Functional testing; function test.
Classifications: Operating and work procedures.
Classifications: Pre-use checks; pre-use inspection.