# NTSB CHI90FA214: Cessna 150L, N10094, Donnybrook, ND, August 5, 1990

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Field investigation · Final report
- Date: August 4, 1990, 19:50 local (Aug 5, 1990, 00:50 UTC)
- Place: Donnybrook, ND
- Coordinates: 48.499298, -101.880577 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=48.4993&lon=-101.8806&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 2 fatal
- Status: Completed, report December 14, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 14545
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI90FA214
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/14545/pdf
- Page: https://openairdocs.org/ntsb/CHI90FA214

## Probable cause

THE PILOT'S FAILURE TO MAINTAIN AIRSPEED WHILE MANEUVERING IN HILLY TERRAIN. CONTRIBUTING FACTORS WERE THE PILOT'S FAILURE TO MAINTAIN ADEQUATE ALTITUDE AND THE SURROUNDING STEEPLY RISING TERRAIN.

## Sequence of events

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

- Loss of control - in flight, maneuvering
  - terrain condition - mountainous/hilly (contributing factor)
  - altitude - inadequate, pilot in command (contributing factor)
  - airspeed - not maintained, pilot in command (cause)
  - stall/spin - inadvertent, pilot in command
- In flight collision with terrain/water, maneuvering

## Analysis

THE PILOT AND PASSENGER HAD TAKEN OFF FROM A GRAVEL ROAD FOR A LOCAL PLEASURE FLIGHT. THE AIRPLANE SUBSEQUENTLY IMPACTED THE SIDE OF A STEEP HILLSIDE APRX 100 FT BELOW A RIDGE LINE. IMPACT WAS NOSE DOWN, AND THE AIRPLANE HAD MOVED SLIGHTLY REARWARD FROM THE INITIAL IMPACT POINT.

## Aircraft

- Registration: [N10094](https://openairdocs.org/deregistered/N10094-1990-09-04), registration cancelled 1990-09-04, S/N 15074790, built 1973 (OpenAirDocs)
- Reported make and model: CESSNA 150L
- Registry model: [Cessna 150L](https://openairdocs.org/model/cessna-150l) (registry code 2071826) (OpenAirDocs)
- Registry engine: [Continental 0-200 series](https://openairdocs.org/engine/continental-0-200-series) (registry code 17020, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 15074790
- Airframe hours: 3866
- Engines: CONTINENTAL O-200-A 100 horsepower reciprocating
- Damage: Destroyed
- Flight: Personal, Part 91
- Operator: Pietsch Flying Service
- Registered owner: Pietscm Flying Service
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, May 1, 1990, 185 hours before

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 32; private; airplane ratings: single-engine land; medical: class 2, valid medical--no waivers/lim.; seat: left; toxicology performed; flight hours: 300 total

## Weather

- Conditions: Visual (VMC), Dusk
- Wind: 360° at 8 knots
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: 72 °F, dew point 43 °F
- Altimeter: 30.00 inHg
- Observed at: MOT

## 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 19900804030019A](https://openairdocs.org/incident/19900804030019A), Aug 4, 1990: Cessna 150L, Donnybrook, ND, Destroyed, 2 fatal. Impacted side off a hill in wings level,nose up attitude. Was giving relatives rides. Seen in steep bank very low.

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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