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ASN Wikibase Occurrence # 217972
Last updated: 24 August 2021
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Date:10-NOV-1987
Time:10:55
Type:Silhouette image of generic B06 model; specific model in this crash may look slightly different
Bell 206B
Owner/operator:
Registration: VH-AZH
MSN: 3075
Fatalities:Fatalities: 0 / Occupants: 3
Other fatalities:0
Aircraft damage: Substantial
Location:78km S of Mount Magnet, WA -   Australia
Phase: Landing
Nature:SU
Departure airport:79km S of Mount Magnet, WA
Destination airport:78km S of Mount Magnet, WA
Investigating agency: BASI
Narrative:
Due to a loose seat belt banging against the fuselage of the helicopter, the pilot slowed the aircraft and commenced an approach to land as soon as possible. The chosen approach path had a tailwind of between 15 and 20 knots. Shortly after commencing the approach, the rate of descent increased rapidly and the pilot's application of collective pitch to correct the situation further increased the descent rate. During the approach, both the audio and visual annunciators indicated that the engine had failed. The pilot lowered collective but then had to flare as the aircraft was about to impact a small mulga tree. The aircraft cleared that tree but was damaged as a result of a collision with a nearby tree. The rapid rate of descent experienced whilst descending downwind with a low forward speed is typical of an aircraft which has settled in its own main rotor downwash, i.e in a Vortex Ring State. No defect was found in the engine which might have explained the reported engine failure. It is possible that the pilot inadvertently selected the throttle to the engine shut-off position as he commenced autorotative flight.

Sources:

https://www.atsb.gov.au/publications/investigation_reports/1987/aair/aair198700112/
https://www.atsb.gov.au/media/32111/aair198700112.pdf

Accident investigation:
cover
  
Investigating agency: BASI
Status: Investigation completed
Duration:
Download report: Final report
Other occurrences involving this aircraft

28 Nov 1997 VH-AZH 0 Colo River, NSW min
13 Jan 2003 VH-AZH 0 Bendora Dam sub


Images:

Photo of VH-AZH courtesy AirHistory.net


Dowerin (YDON)
28 August 1986; (c) Geoff Goodall (via David Carter)

Revision history:

Date/timeContributorUpdates
17-Nov-2018 08:22 Pineapple Added

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