# NTSB DEN84LA040: Cessna P206C, N8669Z, Tremonton, UT, December 5, 1983

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: December 5, 1983, 08:45 local (15:45 UTC)
- Place: Tremonton, UT
- Coordinates: 41.689056, -112.269386 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=41.6891&lon=-112.2694&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): 16301
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN84LA040
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/16301/pdf
- Page: https://openairdocs.org/ntsb/DEN84LA040

## Sequence of events

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

- Nose over, landing - roll
  - notams - not obtained, pilot in command (cause)
  - airport facilities,runway/landing area condition - snow covered (contributing factor)
  - unsuitable terrain or takeoff/landing/taxi area - selected, pilot in command (cause)

## Analysis

BEFORE TAKEOFF, THE PLT OBTAINED A WX BRIEFING & FILED A FLT PLAN, BUT DID NOT ASK FOR NOTAMS. HE WAS UNAWARE THAT THE DESTINATION ARPT WAS NOTAMED AS CLOSED UNTIL AFTER THE FLT. HE SAID THAT DURING ARRIVAL, HE 'DISCOVERED AN UNPLOWED BUT APPARENTLY USED RWY.' HE OBSERVED SEVERAL TRACKS ON THE SNOW COVERED RWY & ASSUMED IT WAS OPEN. THERE WAS NO TOWER OR UNICOM AT THE ARPT. AN APCH FOR A SOFT FIELD LANDING WAS MADE WITH FULL FLAPS & THE ACFT TOUCHED DOWN ON 8 INCHES OF CRUSTED SNOW. ALMOST IMMEDIATELY, THE NOSEWHEEL BECAME BURIED IN THE SNOW, DESPITE THE USE OF FULL UP ELEVATOR. WHEN THE ACFT HAD SLOWED TO ABOUT 10 KNOTS, IT WENT OVER ONTO ITS TOP.

## Aircraft

- Registration: [N8669Z](https://openairdocs.org/deregistered/N8669Z-2013-08-21), registration cancelled 2013-08-21, S/N P206-0469, built 1968 (OpenAirDocs)
- Reported make and model: CESSNA P206C
- Registry model: [Cessna P206C](https://openairdocs.org/model/cessna-p206c) (registry code 2073312) (OpenAirDocs)
- Registry engine: [Continental IO-520 series](https://openairdocs.org/engine/continental-io-520-series) (registry code 17032, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: P206-0469
- Engines: CONTINENTAL IO-520-A 285 horsepower reciprocating
- Damage: Substantial damage
- Flight: Part 135
- Operator: Mercury Air Courier Service
- Registered owner: Fbn Leasing
- Airworthiness certificate: Standard, Normal
- Departed: BMC, BRIGHAM CITY, UT
- Flight plan: VFR
- Airport: U27, Tremonton Municipal, runway 35, 3,445 × 75 ft, snow

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 25; flight instructor, commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left; flight hours: 1,715 total, 54 in this make and model, 1,504 as pilot in command, 215 in the last 90 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 170° at 7 knots
- Visibility: 40 statute miles
- Lowest ceiling: none
- Temperature: 16 °F
- Altimeter: 30.00 inHg
- Observed at: OGD, 32 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 19831205059619A](https://openairdocs.org/incident/19831205059619A), Dec 5, 1983: Cessna P206C, Tremonton, UT, Substantial damage. Aircraft flipped inverted during landing in deep snow on closed runway.

## Other investigations on N8669Z (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 SEA98FA081](https://openairdocs.org/ntsb/SEA98FA081), May 21, 1998: Cessna P206C (N8669Z), Dubois, ID, substantial damage, 3 fatal. Probable cause: Attempted VFR flight into IMC and a loss of aircraft control. An inadequate weather evaluation and drug impairment were factors.

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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