# NTSB SEA84LA091: Hiller UH-12E, N56BA, Buxton, OR, April 19, 1984

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: April 19, 1984, 06:19 local (14:19 UTC)
- Place: Buxton, OR
- Coordinates: 45.729541, -123.190162 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=45.7295&lon=-123.1902&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 39901
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA84LA091
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/39901/pdf
- Page: https://openairdocs.org/ntsb/SEA84LA091

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Roll over, takeoff
  - vertical takeoff - improper, pilot in command (cause)

## Analysis

THE HELICOPTER ENTERED AN UNCONTROLLED RIGHT ROLL WHILE LIFTING OFF FROM A TRAILER & STRUCK THE GROUND WITH THE M/R. THE PLT REPORTED THE TRAILER WAS NOT LEVEL.

## Aircraft

- Registration: [N56BA](https://openairdocs.org/deregistered/N56BA-2014-04-24), registration cancelled 2014-04-24, S/N 1507 (OpenAirDocs)
- Reported make and model: HILLER UH-12E
- Registry model: [Hiller UH-12E](https://openairdocs.org/model/hiller-uh-12e) (registry code 4360122) (OpenAirDocs)
- Registry engine: [Lycoming VO-540 series](https://openairdocs.org/engine/lycoming-vo-540-series) (registry code 41534, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Serial number: 1507
- Airframe hours: 5459
- Engines: ALLISON 250-C20 400 horsepower reciprocating
- Damage: Substantial damage
- Flight: Ferry, Part 91
- Registered owner: Bertea/Aviation, Incorporated
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, March 20, 1984, 33 hours before

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 36; commercial; medical: class 2, valid medical--no waivers/lim.; seat: right; flight hours: 3,567 total, 407 in this make and model, 3,067 as pilot in command, 58 in the last 90 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 10 statute miles
- Temperature: 39 °F, dew point 36 °F

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19840419013849A](https://openairdocs.org/incident/19840419013849A), Apr 19, 1984: Hiller UH12E, Buxton, OR, Substantial damage. Rolled over off a trailer pad during a vertical liftoff. May have entered a dynamic rollover.

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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