# NTSB DEN87LA094: Hughes 269C, N9676F, Scoffield, UT, April 11, 1987

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: April 11, 1987, 09:30 local (15:30 UTC)
- Place: Scoffield, UT
- Coordinates: 39.569885, -110.800186 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=39.5699&lon=-110.8002&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report May 2, 1988
- Report: Approved by Office Director
- NTSB case key (mKey): 17198
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN87LA094
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/17198/pdf
- Page: https://openairdocs.org/ntsb/DEN87LA094

## Sequence of events

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

- Loss of engine power(partial) - mech failure/malf, cruise - normal
  - ignition system,magneto - failure,partial (cause)
- Forced landing, descent - uncontrolled
  - terrain condition - none suitable (cause)
  - autorotation - performed, pilot in command (contributing factor)
- On ground/water collision with object, landing
  - airport/facilities - snow covered (cause)
  - airport/facilities - downhill (cause)
  - object - tree(s) (cause)

## Analysis

THE PLT AND HIS BROTHER WERE ON A LONG CROSS COUNTRY FLT, THROUGH MOUNTAINOUS TERRAIN. AFTER ONE HOUR OF FLT AND WHILE FLYING AT 8,000 FEET THE PLT NOTICED A CHANGE IN ENGINE NOISE AND THE ACFT HAD A PARTIAL POWER LOSS. THE PLT ELECTED TO AUTOROTATE TO A SNOW COVERED SURFACE. THE TOUCHDOWN WAS ON A STEEP SLOPE AND THE HELICOPTER SLID DOWNSLOPE AND STRUCK TREES. POST ACCIDENT INVESTIGATION SHOWED ONE MAGNETO NOT OPERATING PROPERLY.

## Aircraft

- Registration: [N9676F](https://openairdocs.org/deregistered/N9676F-1989-12-08), registration cancelled 1989-12-08, S/N 910124 (OpenAirDocs)
- Reported make and model: HUGHES 269C
- Registry model: [Hughes 269C](https://openairdocs.org/model/hughes-269c) (registry code 4470504) (OpenAirDocs)
- Category: Helicopter
- Serial number: 910124
- Engines: LYCOMING HIO-360-D1A 190 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Wasatch Helicopters, doing business as Wasatch Helicopter Training
- Registered owner: Wasatch Helicopter
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, May 31, 1986
- Departed: BTF, BOUNTIFUL, UT
- Destination: 69V, HUNTINGTON, UT
- Flight plan: VFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 25; private; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 87 total, 87 as pilot in command, 87 in the last 90 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 240° at 10 knots, gusting 17
- Visibility: 15 statute miles
- Lowest ceiling: none

## 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 19870411011899A](https://openairdocs.org/incident/19870411011899A), Apr 11, 1987: Hughes 269C, Scoffield, UT, Substantial damage. Engine seemed to lose partial power. Landed on a snow covered slope and slid into trees. Found one magneto weak.

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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