LAX03LA044 · Cessna 150H
Cessna 150H · Accident: partial loss of engine power (non-mechanical) during initial climb
From Twentynine Palms Airport (TNP) to Twentynine Palms Airport (TNP)
Event
- NTSB case
- LAX03LA044
- 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
- Unknown
- 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 150H
- Aircraft type
- Cessna 150
- 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
- N50346
- Operator
- Karl Hoyer
- Onboard fatalities
- Unknown
- Route
- From Twentynine Palms Airport (TNP), Twentynine Palms, CATo Twentynine Palms Airport (TNP)
- 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
- Initial climb
- 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
- Partial loss of engine power (non-mechanical)
- DamageDestroyed: beyond practical repair. Substantial: damage that affects the structure, performance or handling and normally needs major repair. Minor: less than that. Glossary
- Substantial
Cause areas
- Flightcrew › Carburetor heat, improper use of
- Pilot in command(cfi) › Supervision, inadequate
- Weather condition › Carburetor icing conditions
Approximate · Coordinates from the NTSB case API, which marks them as estimated or does not say; no uncertainty radius is established.
NTSB narrative
The airplane experienced a loss of engine power in the takeoff initial climb and impacted terrain during a forced landing. After completing two uneventful landings, the student pilot input full throttle and began the third takeoff of the day. Over halfway down the runway, about 75 feet above ground level, the student told the CFI that he did not think the engine was developing full power. The CFI took over the controls and confirmed that the partial power condition. While attempting a soft field landing, the nose landing gear impacted a bush and the airplane nosed over. Temperatures were obtained from a weather reporting station located 14 miles west-northwest of the airport. At 1855, the temperature was 52 degrees Fahrenheit and the dew point was 32 degrees Fahrenheit. At 2000, the temperature was 48 degrees Fahrenheit and the dew point was 32 degrees Fahrenheit. The temperatures and dew points were applied to an industry standard Carburetor Icing Probability Chart, and both were within the "serious icing at glide power" portion of the chart.
Probable cause
The improper use of carburetor heat, and the instructor's inadequate supervision which resulted in a loss of engine power due to carburetor icing.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record LAX03LA044
- Event ID
- 20021209X05579
- Case number
- LAX03LA044
- 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, coordinates. Values present in the bulk record are kept.
- The date is the local date; the NTSB stores the UTC date 2002-12-03.
- API snapshot SHA-256: 5aa169a7cdb9dcbfb4c485f9b009abf8db9791656fb14067ee7190b996e06494; retrieved 2026-09-22T09:50:13.132Z.