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ASN Wikibase Occurrence # 215703
Last updated: 7 December 2019
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Date:11-FEB-1986
Time:14:15
Type:Silhouette image of generic H269 model; specific model in this crash may look slightly different
Hughes 269C
Owner/operator:
Registration: VH-WAA
C/n / msn:
Fatalities:Fatalities: 0 / Occupants: 2
Other fatalities:0
Aircraft damage: Substantial
Location:Cheviot Hills, QLD -   Australia
Phase: Landing
Nature:Survey
Departure airport:Cheviot Hills, QLD
Destination airport:Cheviot Hills, QLD
Investigating agency: BASI
Narrative:
The helicopter was being used as an platform for test equipment. Part of the test equipment included an aerial that was mounted vertically below the helicopter. This aerial could be retracted and stowed in a horizontal position for landing by operating a control which was positioned in front of the technician. On this occasion the pilot inadvertently attempted to land the helicopter with the aerial extended. Just prior to touchdown, the helicopter began to vibrate, the pilot lowered the collective and the helicopter rolled onto its right side. Following the completion of each test it was normal for the technician to raise the aerial prior to landing. On this occasion, the technician became engrossed with the transmission of test data and forgot to retract the aerial. The pilot was concentrating on the landing and neglected to ensure that the aerial had been retracted. Normally if a landing is attempted with the aerial extended a weak link in the system fails and the aerial is retracted by a spring. However, it is believed that because the helicopter touched down with little forward speed the weak link did not fail at the required time in the landing sequence.

Sources:

https://www.atsb.gov.au/publications/investigation_reports/1986/aair/aair198602638/
https://www.atsb.gov.au/media/31129/aair198602638.pdf

Accident investigation:
cover
  
Investigating agency: BASI
Status: Investigation completed
Duration:
Download report: Final report


Revision history:

Date/timeContributorUpdates
26-Sep-2018 11:12 Pineapple Added

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