# NTSB SEA88LA064: Marlow Hilyard Executive, N5045J, Elko, NV, March 20, 1988

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Limited investigation · Final report
- Date: March 19, 1988, 17:00 local (Mar 20, 1988, 01:00 UTC)
- Place: Elko, NV
- Coordinates: 40.950508, -115.78952 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=40.9505&lon=-115.7895&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious, 1 uninjured
- Status: Completed, report April 25, 1989
- Report: Approved by Office Director
- NTSB case key (mKey): 40793
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA88LA064
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/40793/pdf
- Page: https://openairdocs.org/ntsb/SEA88LA064

## Sequence of events

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

- Roll over, landing - flare/touchdown
  - unsuitable terrain or takeoff/landing/taxi area - selected, pilot in command (cause)
  - terrain condition - downhill (contributing factor)

## Analysis

THE PILOT MADE A LANDING ON SLOPING TERRAIN. THE GYROCOPTER ROLLED TO THE LEFT WITH THE MAIN ROTOR STRIKING SAGE BRUSH. THE ENGINE WAS TWISTED FROM ITS MOUNTS RUPTURING A FUEL LINE. A FIRE RESULTED CONSUMING THE GYROCOPTER. THE PILOT DID NOT HOLD A PILOT OR MEDICAL CERTIFICATE BUT REPORTED 155 HOURS EXPERIENCE IN THE AIRCRAFT.

## Aircraft

- Registration: [N5045J](https://openairdocs.org/deregistered/N5045J-2011-04-26), registration cancelled 2011-04-26, S/N TH-1 (OpenAirDocs)
- Reported make and model: MARLOW HILYARD EXECUTIVE
- Registry model: [Hilyard Marlo L ROTORWAY EXEC](https://openairdocs.org/model/hilyard-marlo-l-rotorway-exec) (registry code 13017DE) (OpenAirDocs)
- Category: Gyroplane, amateur-built
- Serial number: TH-1
- Engines: ROTORWAY 152 85 horsepower reciprocating
- Damage: Destroyed
- Fire: On-Ground
- Flight: Personal, Part 91
- Operator: Marlow L. Hilyard
- Registered owner: Marlo Hilyard
- Airworthiness certificate: Special, Experimental (Special)
- Departed: ELKO, NV

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 30; seat: left; flight hours: 155 total, 155 in this make and model, 150 as pilot in command

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 50 statute miles
- Lowest ceiling: none
- Temperature: 64 °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 19880319005979A](https://openairdocs.org/incident/19880319005979A), Mar 19, 1988: Amtr ROTORWAYEXEC, Elko, NV, Destroyed. Set down on a slope and helicopter rolled over and burned. Sketchy details indicate possible dynamic roll over.

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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