# NTSB DEN83LA099: Enstrom F-28F, N8623B, Belfield, ND, April 17, 1983

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: April 17, 1983, 16:00 local (23:00 UTC)
- Place: Belfield, ND
- Coordinates: 46.879993, -103.189743 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=46.8800&lon=-103.1897&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 16065
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN83LA099
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/16065/pdf
- Page: https://openairdocs.org/ntsb/DEN83LA099

## Sequence of events

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

- Roll over, landing - flare/touchdown
  - terrain condition - uphill (contributing factor)
  - unsuitable terrain or takeoff/landing/taxi area - selected, pilot in command (contributing factor)
  - rotorcraft flight controls - improper use of, pilot in command (cause)
  - lack of total experience in type of aircraft, pilot in command (contributing factor)

## Analysis

THE HELICOPTER ROLLED OVER ON A SLIGHT SLOPE IN AN OPEN FIELD DURING A LANDING. THE PILOT STATED THAT THE ACFT TOUCHED DOWN ON THE LEFT SKID, THE ACFT STARTED TO TIP TO THE LEFT AND HE OVER CORRECTED SO THAT THE ACFT ROLLED OVER TO THE RIGHT.

## Aircraft

- Registration: [N8623B](https://openairdocs.org/aircraft/N8623B), registered now, S/N 728, built 1982 (OpenAirDocs)
- Reported make and model: ENSTROM F-28F
- Registry model: [Enstrom F-28F](https://openairdocs.org/model/enstrom-f-28f) (registry code 3300412) (OpenAirDocs)
- Registry engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999) (OpenAirDocs)
- Category: Helicopter
- Serial number: 728
- Airframe hours: 77
- Engines: LYCOMING HIO-360-E1AD 205 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Circle K Construction
- Airworthiness certificate: Standard, Normal

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 25; student; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; flight hours: 39 total, 39 in this make and model, 23 as pilot in command

## Weather

- Conditions: Visual (VMC), Day
- Wind: 320° at 15 knots
- Visibility: 20 statute miles
- Lowest ceiling: 5,000 ft broken
- Temperature: 57 °F
- Altimeter: 29.00 inHg
- Observed at: DIK, 20 nm away

## 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 19830417013869A](https://openairdocs.org/incident/19830417013869A), Apr 17, 1983: Enstrm F28F, Belfield, ND, Substantial damage. Touched left skid on a slope landing. Overcompensated and rolled over to the right on the downslope.

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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