Overall Trends
Total, fatal, and serious accidents in the selected range.
Premium research interface
The modern interface for aviation safety intelligence.
Search investigations, review source evidence, monitor watched reports, and trace long-term patterns from one calm, data-first workspace.
63k+
Reports indexed
1940-2026
Coverage
Recent
Last data refresh
Search everything
Fast key and full-text search with live filters, watches, and precise metadata.
Use quotes for exact phrase matches (for example "fuel selector valve").
Featured Report
Safety trends by operating rule
Track fatal and non-fatal accident patterns across Part 91, Part 135, and Part 121 operations.
Loading trend charts…
High-signal investigations
Major cases, deep-report coverage, and investigation media across decades of NTSB history.
Browse the aviation graph
Move quickly by aircraft, airport, operator, and time with indexes built for research, not wandering.
Last Data Update
By Decade
By Month
Aircraft Manufacturer
More manufacturersAirports
More airportsOperators
More operatorsAbout
Aviation safety reports, made easier to study
NTSB Reports is an independent research and search tool for public aviation accident and incident records. It brings NTSB aviation reports, structured fields, docket files, extracted figures, photos, videos, and update history into one searchable interface.
The goal is practical safety education: make it faster to find relevant investigations, compare similar events, review factual records, and understand the evidence behind probable-cause and preliminary reports.
The investigative work and source records belong to the National Transportation Safety Board and the published investigation record. This site is not affiliated with or endorsed by the NTSB.
FAQs
NTSB Report
April 12, 1986 · Cessna 207A · N1721Q
Ogden, UT
Overview
Report Status
Preliminary report
Event Type
Accident
Date
April 12, 1986
Injury Outcomes
1 injury (1 minor injury)
Location
Ogden, UT
Aircraft
Cessna 207A
Tail Number
N1721Q
Operator
Soloy Conversion
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
DEN86FA115
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, and 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.
Full Narrative
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.
Flight
Event TypeAccident
Event Time16:30 MST
Nearest Airport15nm WNW
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna 207A
Tail NumberN1721Q
Aircraft CategoryAir
DamageSubstantial
OperatorSoloy Conversion
Operating RulePart 91
Engines1
Engine TypeTurboprop
Engine DetailsAllison · 250-C20S · Turboprop · 420
Seats2
People & Injuries
Injury Summary1 injury (1 minor injury)
Fatal0
Serious0
Minor1
Uninjured0
Total1
Crew 1Age 53 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind160° @ 10 kt
Visibility40 sm
CeilingOvercast 12000 ft
Temperature / Dew Point66 F / 34 C
Altimeter0
Observation Time23:50
Weather SourcePILO