DEN90FA041 · Cessna 182P
Cessna 182P · Accident: in flight encounter with weather
From Compton Woodley Airport (CPM) to Mammoth Yosemite Airport (MMH)
Event
- NTSB case
- DEN90FA041
- 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
- 3 · 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
- Instrument Meteorological Cond
Cessna 182P
- Aircraft type
- Cessna 182
- 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
- N5831J
- Operator
- Grice, Thomas G. · private individual
- Onboard fatalities
- Unknown
- Route
- From Compton Woodley Airport (CPM), Compton, CATo Mammoth Yosemite Airport (MMH), MAMMOTH LAKE, CA
- 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
- Unknown
- 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
- In flight encounter with weather
- 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
- Visual flight rules (VFR) flight into instrument meteorological conditions (IMC)
- 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
- Pilot in command › Proper altitude, not maintained
- Pilot in command › VFR flight into imc, continued
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
THE PLT HAD A CABIN NR MAMMOTH/JUNE LAKES ARPT & OFTEN FLEW THERE ON WEEKENDS. WHILE ON A NGT FLT, HE COMMUNICATED WITH AN OUTBOUND CARGO PLT, WHO WARNED OF HVY SNW FALL & POOR VIS AT THE ARPT. WHILE CONVERSING, THE PLT OF N5831J REPLIED, 'OH DEAR, MY CAR IS UP THERE.' THE CARGO PLT AGAIN WARNED THAT HE DOUBTED IF N5831J COULD LND AT THE ARPT. A WORKER, WHO LEFT THE ARPT AT 2030 PST, NOTED THE RWY LGTS CAME ON AS HE WAS DRIVING HOME. HE BELIEVED THE LGTS WERE ACTIVATED BY A PLT (BY KEYING THE MIKE 5 TIMES ON UNICOM FREQ). THREE WITNESSES SAW THE ACFT (OR ACFT LGTS) AT ABOUT THE TIME IT CRASHED. IMPACT OCCURRED IN A LEFT WING LOW, NOSE DWN ATTITUDE. ONE WITNESS THOUGHT THE ACFT WAS TURNING OR ARCING WHEN IT CRASHED. ANOTHER WITNESS ESTIMATED THERE WAS A 100' CEILING WITH SNW FALLING ON A DARK NGT. IMPACT WAS ABOUT 1 MI FM A HIWAY BTN MAMMOTH LAKES & BISHOP, CA (ABT 10 MI SE OF MAMMOTH/JUNE LAKES ARPT & 17 MI NW OF BISHOP ARPT). NO PREIMPACTPART FAILURE/MALFUNCTION OF THE ACFT OR ENG WAS FND. THERE WAS NO PUBLISHED INST APCH PROC AT MAMMOTH/JUNE LAKES ARPT.
Probable cause
CONTINUED FLIGHT BY THE PILOT INTO INSTRUMENT METEOROLOGICAL CONDITIONS (IMC), AND HIS FAILURE TO MAINTAIN SUFFICIENT ALTITUDE ABOVE THE GROUND. FACTORS RELATED TO THE ACCIDENT WERE: DARK NIGHT, ADVERSE WEATHER CONDITIONS, SELF INDUCED PRESSURE, AND SPATIAL DISORIENTATION.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record DEN90FA041
- Event ID
- 20001212X22402
- Case number
- DEN90FA041
- 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: local date, investigation status. Values present in the bulk record are kept.
- The date is the local date; the NTSB stores the UTC date 1990-01-13.
- API snapshot SHA-256: 9142f623457feda0b9f0fedfe1a9000d9cb01e6be4f2519737baf50e3885368b; retrieved 2026-09-21T03:02:17.938Z.