# NTSB DEN86FA115: Cessna 207A, Ogden, UT, April 12, 1986

- Type: NTSB accident investigation
- Date: April 12, 1986, 23:30 UTC, 16:30 local
- Place: Ogden, UT
- Coordinates: 41.209625, -111.970497 (estimated)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 16816
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN86FA115
- NTSB report (PDF): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/16816/pdf
- Page: https://openairdocs.org/ntsb/DEN86FA115

## Analysis

ACFT WAS EN ROUTE TO SLC WHERE IT WAS TO BE PUT ON STATIC DISPLAY WITH OTHER ACFT EQUIPPED WITH SOLOY-CONVERSIONS (ALLISON 250-C20S TURBOSHAFT ENGINE INSTALLATION). DURING DESCENT THROUGH 12,000 FT INTO SLC AREA ENG FLAMED OUT AND THE PROP AUTO-FEATHERED. PLT RESTARTED ENG BUT WHEN HE TRIED TO ADVANCE POWER ENG SURGED AND QUIT. PLT RESTARTED ENG AND TURNED ON ENG ANTI-ICE. WHEN POWER WAS ADVANCED ENG SURGED AND QUIT. PLT RESTARTED ENG. HE APPLIED ALTERNATE AIR. WHEN POWER WAS ADVANCED ENG SURGED AND POWER DROPPED TO IDLE. PLT TURNED OFF ENG ANTI-ICE AND ALTERNATE AIR, PULLED AUTO FEATHER CIRCUIT BREAKER, SWITCHED START/MOTOR SWITCH TO START, AN TRIED TO ADVANCE POWER. ENG CONTINUED TO SURGE. PLT MADE FORCED LANDING ON MUD FLAT IN GREAT SALT LAKE. DISASSEMBLY/EXAMINATION OR CHECK/TEST ENG, FUEL CONTROL, POWER TURBINE GOVERNOR, AND FUEL REVEALED NO DISCREPANCIES. EXAMINATION OF FUEL FLOW TRANSDUCER REVEALED PARTIAL BLOCKAGE. BLOCKAGE WAS BLOWN OUT AND NEVER FOUND AND COULD NOT BE IDENTIFIED.

## Sequence of events

- Loss of engine power(total) - nonmechanical, descent - normal
  - fluid,fuel - starvation (cause)
  - fuel system,line - blocked(partial) (cause)
  - fuel system,line - foreign object (cause)
- Forced landing, descent - emergency
- Nose over, landing - roll
  - airport facilities,runway/landing area condition - none suitable (contributing factor)
  - terrain condition - soft

## Aircraft

- Registration: N1721Q, a cancelled registration (https://openairdocs.org/deregistered/N1721Q-1990-03-19) (OpenAirDocs)
- Reported make and model: CESSNA 207A
- Registry model: Cessna 207A (registry code 2073605, https://openairdocs.org/model/cessna-207a) (OpenAirDocs)
- Registry engine: Continental IO-520-F (registry code 17237, https://openairdocs.org/engine/continental-io-520-f) (OpenAirDocs)
- Category: Airplane
- Serial number: 20700784
- Airframe hours: 329
- Engines: ALLISON 250-C20S 420 horsepower
- Damage: Substantial damage
- Flight: Business, Part 91
- Operator: SOLOY CONVERSION, LTD
- Departed: BOI, BOISE, ID
- Destination: SLC, SALT LAKE CITY, UT
- Airport: runway 0
- FAA reports: 19860412011429A (https://openairdocs.org/incident/19860412011429A) (OpenAirDocs)

## Flight crew

- Pilot; age 53; commercial; medical class 2; hours: 6 24 hours, 6 24 hours in this make and model, 86 30 days, 80 30 days in this make and model, 114 90 days, 100 90 days in this make and model, 1,000 instructor, 7,644 pic, 12,691 total, 191 total in this make and model

## Weather

- Conditions: Visual (VMC), Day
- Wind: 160° at 10 knots
- Visibility (statute miles): 40
- Lowest ceiling (ft AGL): 12000
- Temperature (°F): 66.2

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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From OpenAirDocs.org, an independent open copy of NTSB and FAA data. The NTSB's own report is the official record of an investigation.