Investigation Report
Sikorsky S-92A Severe Vibration and Tail Rotor Pivot Bearing Separation
Sikorsky S-92A, G-CHCK 04-08
- AAIB
- Investigation Report
- Mechanical failure
- Helicopter operationsInspection and maintenance
- Helicopter
- Functional testingOperating and work proceduresPreventive maintenance
Summary
Investigation of severe vibration aboard Sikorsky S-92A G-CHCK, followed by a successful run-on landing. Tail rotor pivot bearing separation was probably preceded by retainer disbonding. The report examines bearing inspection access and instructions, revised inspection intervals, and a flight recorder configuration mismatch addressed through labelling and post-installation testing.
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: Preventive maintenance; preventative maintenance; planned maintenance.