ASN Wikibase Occurrence # 217693
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| Date: | Thursday 20 August 1987 |
| Time: | 08:35 |
| Type: |  Bell 47G-5A/A1 |
| Owner/operator: | |
| Registration: | VH-AAU |
| MSN: | 6864 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Location: | Leila Creek, NT -
 Australia
|
| Phase: | Landing |
| Nature: | Agricultural |
| Departure airport: | Cape Crawford, NT |
| Leila Creek, NT | |
| Investigating agency: | BASI |
| Confidence Rating: |  Accident investigation report completed and information captured |
At a height of about 80 feet above ground level with little forward speed, the helicopter suffered a complete power loss. During the subsequent autorotational descent the main rotor struck trees, and the right skid was torn off on impact with the ground. Investigation revealed that two connecting rods had become detached from the crankshaft, and the engine had seized. It was likely that a previous overspeeding of the engine had stretched the big end bolts. This led to a loss of torque on the nuts retaining the bolts, which finally suffered overload failures.
Accident investigation:
 |
|
Sources:
https://www.atsb.gov.au/publications/investigation_reports/1987/aair/aair198700742/
https://www.atsb.gov.au/media/34392/aair198700742.pdf
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 13-Nov-2018 09:48 | Pineapple | Added |
| 01-Dec-2019 10:25 | TB | Updated [Plane category] |
Corrections or additions? ... Edit this accident description
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