# NTSB DEN84FA166: Beech BB-55, N6757Z, Duchesne, UT, May 31, 1984

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Field investigation · Final report
- Date: May 30, 1984, 21:30 local (May 31, 1984, 03:30 UTC)
- Place: Duchesne, UT
- Coordinates: 40.100543, -110.48928 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=40.1005&lon=-110.4893&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 16218
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN84FA166
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/16218/pdf
- Page: https://openairdocs.org/ntsb/DEN84FA166

## Sequence of events

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

- In flight collision with terrain/water, cruise - normal
  - terrain condition - mountainous/hilly (contributing factor)
  - weather condition - clouds (contributing factor)
  - light condition - dark night (contributing factor)
  - preflight briefing service - not obtained, pilot in command (contributing factor)
  - vfr procedures - not followed, pilot in command (cause)
  - altitude - inadequate, pilot in command (cause)

## Analysis

ACFT COLLIDED WITH A MOUNTAIN AT AN ELEVATION OF 12,000 FT MSL. WX AT ROOSEVELT, UT, 42 NM SE OF THE ACCIDENT SITE AT 2030 MDT WAS ESTIMATED 7,000 FT BKN, 25,000 FT BKN, 40 MILES VISIBILITY, 70 DEG F, WITH CUMULUS NIMBUS CLOUDS NE AND SE. RADAR SUMMARY CHARTS SHOW NUMEROUS SCATTERED SHOWERS AND THUNDERSTORMS THROUGHOUT THE AREA AS WERE FORECAST. ACCIDENT OCCURRED APRX 6 MILES NORTH OF VICTOR AIRWAY 101. MINIMUM EN RUOTE ALT FOR V101 IS 15,000 FT MSLWITH A MINIMUM OBSTRUCTION CLEARANCE ALT OF 14,600 FT MSL. NO FLIGHT PLAN WAS FILED FOR THE FLT AND THE ACFT WAS NOT UNDER RADAR CONTACT. NO RECORD OF THE PLT OBTAINING A WX BRIEFING BEFORE THE FLT COULD BE FOUND.

## Aircraft

- Registration: [N6757Z](https://openairdocs.org/deregistered/N6757Z-1984-12-04), registration cancelled 1984-12-04, S/N TC-2324 (OpenAirDocs)
- Reported make and model: Beech BB-55
- Registry model: [Beech 95-B55 (T42A)](https://openairdocs.org/model/beech-95-b55-t42a) (registry code 1152706) (OpenAirDocs)
- Category: Airplane
- Serial number: TC-2324
- Airframe hours: 155
- Engines: CONTINENTAL IO-470-L 260 horsepower reciprocating
- Damage: Destroyed
- Fire: On-Ground
- Flight: Personal, Part 91
- Registered owner: Watson Memorial Co.
- Airworthiness certificate: Standard, Normal
- Departed: SLC, SALT LAKE CITY, UT
- Destination: APA, ENGLEWOOD, CO

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 46; private; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 3, valid medical--no waivers/lim.; seat: left; flight hours: 1,012 total, 199 in this make and model, 20 in the last 90 days

## Weather

- Conditions: Visual (VMC), Night/dark
- Visibility: 40 statute miles
- Lowest ceiling: 700 ft broken

## 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 19840530034579A](https://openairdocs.org/incident/19840530034579A), May 30, 1984: Beech 95B55, Duchesne, UT, Destroyed. Aircraft crashed on mt agassiz at the 12100 ft level. Radar indicated weather in vicinity of crash.

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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