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DEN90FA159 · Cessna P210R

12 Jul 1990 · Ogden, UT, United States

Great Western Aviation Cessna P210R · Accident: total loss of engine power (mechanical failure) en route

From Ogden Hinckley Airport (OGD) to 334 · DUTCH JOHN, UT

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Event

NTSB case
DEN90FA159
Event typeAccident: someone killed or seriously injured, or the aircraft substantially damaged (NTSB definition). Incident: an occurrence that affected or could have affected safety, short of that. Glossary
Accident
InvestigationHow far the investigation had got when the record was published: preliminary, ongoing, final or completed. Unknown where the source does not say. Glossary
Completed
API-reported fatalities
1 · all aircraft and ground
Ground fatalities
0
OperationWhat kind of flying it was, grouped by the rules it flew under: airline (US Part 121), air taxi and commuter (Part 135), general aviation (Part 91 and similar), military or government. Glossary
General aviation
WeatherVisual meteorological conditions (VMC): good enough to fly by looking outside. Instrument conditions (IMC): cloud or low visibility, flying by instruments. Glossary
Visual Meteorological Cond

Cessna P210R

Aircraft type
Cessna 210
Category
Airplane
RegistrationThe aircraft's tail number, such as N12345 or G-ABCD. Registrations are reissued, so the same one years apart can be a different aircraft. Glossary
N6203A
Onboard fatalities
Unknown
Route
From Ogden Hinckley Airport (OGD), Ogden, UTTo 334 · DUTCH JOHN, UT
Aircraft age
Not recorded
Flight rulesThe regulations the flight operated under: in the US, Part 91 (general aviation), Part 121 (airlines), Part 135 (air taxi and commuter) and others; for flights abroad, the NTSB's coarser commercial or non-commercial code. Glossary
Part 91: General Aviation
Phase of flightThe stage of the flight when things started to go wrong: standing, taxi, takeoff, initial climb, en route, maneuvering, approach or landing. Glossary
En route · climb to cruise
First occurrenceThe single coded event the NTSB judges best describes what happened (records from 2008 on). Older records name the first occurrence in the sequence instead. Glossary
Total loss of engine power (mechanical failure)
Also codedOther events the NTSB coded in the sequence, such as a wire strike after a loss of power. Flight Findings uses them for its kinds of event. Glossary
Wire, transmission
DamageDestroyed: beyond practical repair. Substantial: damage that affects the structure, performance or handling and normally needs major repair. Minor: less than that. Glossary
Destroyed

Cause areas

  • Engine assembly, cylinder › Overtemperature
  • Engine assembly, piston › Burned
  • Pilot in command › Visual lookout, inadequate

Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.

NTSB narrative

THE TWO PLTS HAD DEPARTED ON A FLT TO GET TWO REVENUE PASSENGERS. THE LEFT SEAT PLT WAS AT THE CTLS WHEN A LOSS OF ENG POWER OCCURRED. HE MADE A 180 DEG TURN & WAS GLIDING DOWN A CANYON WHEN IT STRUCK AN UNMARKED POWER LINE AT THE MOUTH OF THE CANYON. IMPACT OCCURRED ABOUT 100 TO 200 FT AGL. A POST-ACDNT EXAM OF THE ENG REVEALED EVIDENCE OF DETONATION/PREIGNITION & EXCESSIVE HEATING IN THE #1 CLYINDER & SUBSEQUENT FAILURE OF THE #1 PISTON.

Probable cause

FAILURE OF THE #1 PISTON DUE TO PRE-IGNITION/DETONATION IN THE #1 CYLINDER, AND INADEQUATE VISUAL LOOKOUT BY THE PILOT (HIS FAILURE TO SEE-AND-AVOID THE OBSTRUCTION). THE OBSTRUCTION (POWER LINE) WAS A RELATED FACTOR.

Verbatim NTSB analysis and probable cause from the NTSB dataset

Sources

NTSB record DEN90FA159
Event ID
20001212X23670
Case number
DEN90FA159
Dataset
historical-pre2008
Source SHA-256
89e2df6d848e7ab3b42e7d7c7a03ff403303057a26ca04c95b3ea67201c3ce74
Source notes (4)
  • Unreviewed is an editorial label, not an investigation status. API-sourced is not report-checked or human-reviewed. Explicit event totals are used without summing aircraft injury tables; onboard allocation is withheld. Unknown values remain unknown. The operation category is mapped from the NTSB-reported FAR part and has not been reviewed.
  • Filled from the NTSB case API where the bulk record had no value: investigation status. Values present in the bulk record are kept.
  • The date is the local date, which is the same as the UTC date the NTSB stores.
  • API snapshot SHA-256: 5cd78b0241cc34c84c057190539a896c060ca4b732b479b9b915f73643478b9e; retrieved 2026-09-21T02:29:21.715Z.