DEN86FA115

NTSB accident investigation · Cessna 207A · Ogden, UT · April 12, 1986

Accident · Minor injuriesField investigationFinal report
Date
April 12, 1986, 16:30 local (23:30 UTC)
Place
Ogden, UT
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N1721QCessna 207A
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
FAA report
19860412011429A
Case key
16816

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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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

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

Loss of engine power(total) - nonmechanicalDescent - normal
Fluid,fuel - starvationCause
Fuel system,line - blocked(partial)Cause
Fuel system,line - foreign objectCause
Forced landingDescent - emergency
Nose overLanding - roll
Airport facilities,runway/landing area condition - none suitableFactor
Terrain condition - soft

Aircraft

Registration
N1721Q
Reported as
Cessna 207A
Category
Airplane
Serial number
20700784
Airframe hours
329
Engine
Allison 250-C20S, 420 horsepower, turbo prop
Damage
Substantial damage
Flight
Business · Part 91
Operator
Soloy Conversion, Ltd
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Annual · January 24, 1986 · 66 hours before
Departed
BOI · Boise, ID
Destination
SLC · Salt Lake City, UT

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
53
Certificate
Commercial
Airplane ratings
Multi-engine land, Single-engine sea, Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
12,691 total · 191 in this make and model · 7,644 as pilot in command · 114 in the last 90 days · 86 in the last 30 days · 6 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
160° at 10 knots
Visibility
40 statute miles
Lowest ceiling
12,000 ft overcast
Temperature
66 °F, dew point 34 °F
Observed at
OGD, 13 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.