# NTSB WPR20WA081: Oas UH-1H, Williamtown Aerodrome, Australia, December 7, 2019

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Foreign investigation
- Date: December 7, 2019
- Place: Williamtown Aerodrome, Australia
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Defining event: [Enroute: Loss of tail rotor effectiveness](https://openairdocs.org/ntsb-events/242)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Led by another country's authority
- NTSB office: Western Pacific Region
- Lead agency: Other
- NTSB case key (mKey): 100867
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR20WA081
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/100867/pdf
- Page: https://openairdocs.org/ntsb/WPR20WA081

## Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event best describes what happened.

- [Enroute: Loss of tail rotor effectiveness](https://openairdocs.org/ntsb-events/242) (defining event); cases with it: [All aircraft, 100 cases](https://openairdocs.org/ntsb-events/242/sequence.md)

## Factual narrative

The government of Australia has notified the NTSB of an accident involving a OAS UH-1H helicopter that occurred on December 07, 2019. The NTSB has appointed a U.S. Accredited Representative to assist the government of Australia's investigation under the provisions of ICAO Annex 13.All investigative information will be released by the government of Australia.

## Aircraft

- Registration: VH-OXI (not matched to a registry record)
- Reported make and model: OAS UH-1H
- Category: Helicopter
- Serial number: 64-13497
- Damage: Substantial damage
- Operator: Touchdown Helicopters
- Airworthiness certificate: Unknown

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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