# NTSB DEN87LA026: Beech A23-24, N5996S, Vernal, UT, November 29, 1986

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: November 28, 1986, 17:30 local (Nov 29, 1986, 00:30 UTC)
- Place: Vernal, UT
- Coordinates: 40.549022, -109.570907 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=40.5490&lon=-109.5709&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 17154
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN87LA026
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/17154/pdf
- Page: https://openairdocs.org/ntsb/DEN87LA026

## Sequence of events

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

- Loss of control - on ground/water, landing - roll
  - in-flight planning/decision - improper, pilot in command (cause)
  - terrain condition - soft (contributing factor)
  - unsuitable terrain or takeoff/landing/taxi area - selected, pilot in command (cause)
  - directional control - not maintained, pilot in command (cause)
- On ground/water collision with object, landing - roll
  - terrain condition - high obstruction(s)

## Analysis

THE PLT ATTEMPTED TO LAND ON A DIRT ROAD NEAR TWO OIL RIGS. HE SAID HE MADE SEVERAL LOW PASSES TO VIEW THE ROAD SURFACE. DURING THE LANDING ROLL, THE WHEELS OF THE ACFT DUG INTO THE SOFT SURFACE. A LOSS OF CONTROL OCCURRED WHICH RESULTED IN THE ACFT TRAVELING OFF THE ROAD, STRIKING A GAS PIPE LINE AND ENDING UP IN A DITCH.

## Aircraft

- Registration: [N5996S](https://openairdocs.org/deregistered/N5996S-2013-04-25), registration cancelled 2013-04-25, S/N MA-69, built 1966 (OpenAirDocs)
- Reported make and model: BEECH A23-24
- Registry model: [Beech A23-24](https://openairdocs.org/model/beech-a23-24) (registry code 1151226) (OpenAirDocs)
- Registry engine: [Lycoming I0360 series](https://openairdocs.org/engine/lycoming-i0360-series) (registry code 41515, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: MA-69
- Airframe hours: 3000
- Engines: LYCOMING IO-360-A2B 200 horsepower reciprocating
- Damage: Substantial damage
- Flight: Business, Part 91
- Registered owner: Patrick Allred
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, May 8, 1986
- Departed: 74V, ROOSEVELT, UT

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 30; private; airplane ratings: single-engine land; medical: class 3, expired; seat: left; flight hours: 2,688 total, 1,625 in this make and model, 2,260 as pilot in command, 400 in the last 90 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 60 statute miles
- Lowest ceiling: none
- Temperature: 45 °F, dew point -0 °F

## Other investigations on N5996S (1)

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.

- [NTSB NYC67D0506](https://openairdocs.org/ntsb/NYC67D0506), Feb 5, 1967: Beech 23 (N5996S), Danbury, CT, substantial damage

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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