Summary
After landing, as the pilot lowered the collective lever, the helicopter entered ground resonance. Recovery action was not taken by the pilot and one of the main rotor blades struck a fuel drum. The resulting imbalance of the main rotor system caused the rotor mast to separate from its attachment. An inspection of the helicopter revealed that the undercarriage oleo struts had incorrect and differing inflation levels, and that the main rotor dampers had been incorrectly assembled.
Occurrence summary
| Investigation number | 198404494 |
|---|---|
| Occurrence date | 14/06/1984 |
| Location | Mt Anderson Homestead, 80km South-east of Derby |
| Report release date | 18/05/1987 |
| Report status | Final |
| Investigation type | Occurrence Investigation |
| Investigation status | Completed |
| Mode of transport | Aviation |
| Aviation occurrence category | Airframe - Other |
| Occurrence class | Accident |
| Highest injury level | None |
Aircraft details
| Manufacturer | Hughes Helicopters |
|---|---|
| Model | 269 |
| Registration | VH-KZR |
| Sector | Helicopter |
| Operation type | Aerial Work |
| Departure point | Mt Anderson Homestead WA |
| Destination | Mt Anderson Homestead WA |
| Damage | Substantial |