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Lake Powell Air Service Cessna T207A accident

10 Oct 1989 · Grand Canyon, AZ, United States

Cessna T207A · Accident: loss of engine power en route

From Page Municipal Airport (PGA) to an unrecorded destination

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Event

NTSB case
LAX90FA007
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
0 · 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
Charter & commuter
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 T207A

Aircraft type
Cessna 207
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
N7602U
Onboard fatalities
Unknown
Route
From Page Municipal Airport (PGA), Page, AZTo not recorded
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 135: Air Taxi & Commuter
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 · 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
Loss of engine power
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, crankshaft › Failure, partial

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

NTSB narrative

THE AIRPLANE WAS FLYING A SCENIC TOUR WHEN THERE WAS A LOSS OF ENGINE POWER. THE PILOT SWITCHED FUEL TANKS TO THE FULLEST TANK AND POWER WAS REGAINED MOMENTARILY. THE ENGINE STOPPED. THE PROPELLER DID NOT WINDMILL. THE PILOT ACCOMPLISHED AN OFF AIRPORT LANDING IN RUGGED MOUNTAINOUS TERRAIN. DISASSEMBLY OF THE ENGINE REVEALED THE CRANKSHAFT HAD FRACTURED. EXAMINATION OF THE FRACTURE REVEALED SUBSURFACE METAL FATIGUE.

Probable cause

THE INFLIGHT FAILURE OF THE AIRPLANE'S POWERPLANT AS A RESULT METAL FATIGUE WHICH ALLOWED THE CRANKSHAFT TO FRACTURE. CONTRIBUTING TO THE ACCIDENT WAS MOUNTAINOUS TERRAIN OF THE GRAND CANYON WHICH DID NOT ALLOW A SUITABLE FORCED LANDING AREA.

Verbatim NTSB analysis and probable cause from the NTSB dataset

Sources

NTSB record LAX90FA007
Event ID
20001213X29624
Case number
LAX90FA007
Dataset
historical-pre2008
Source SHA-256
89e2df6d848e7ab3b42e7d7c7a03ff403303057a26ca04c95b3ea67201c3ce74
Source notes (5)
  • 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: e47b2b36c07c5835ff2427684b73de549a23b1dbe478238e4b49b8ef11f5da13; retrieved 2026-09-18T19:07:35.766Z.
  • The NTSB's operator name is blank for N7602U; the operator shown is the name the NTSB records it doing business as.