LAX91LA218 · Cessna 152
Univ of Calif Flying Club Cessna 152 · Accident: total loss of engine power (non-mechanical) en route
From Oakland San Francisco Bay Airport (OAK) to an unrecorded destination
Event
- NTSB case
- LAX91LA218
- 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
- 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 152
- Aircraft type
- Cessna 152
- 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
- N6507H
- Operator
- Univ of Calif Flying Club
- Onboard fatalities
- Unknown
- Route
- From Oakland San Francisco Bay Airport (OAK), Oakland, CATo 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 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 · 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 (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
- Pilot in command(cfi) › Carburetor heat, not used
- Weather condition › Carburetor icing conditions
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
THE LOCAL AREA DUAL INSTRUCTIONAL FLIGHT WAS ENROUTE TO THE PRACTICE AREA AT AN ALTITUDE OF 1,300 FEET WHEN THE ENGINE SUDDENLY LOST POWER. THE INSTRUCTOR'S ATTEMPTS TO REMEDY THE LOSS OF POWER WERE UNSUCCESSFUL AND THE AIRCRAFT COLLIDED WITH A BRIDGE STRUCTURE AND AN AUTOMOBILE DURING AN ATTEMPTED FORCED LANDING ON A FREEWAY. THE AIRCRAFT WAS EXAMINED BY AN FAA AIRWORTHINESS INSPECTOR. IN HIS REPORT OF THE EXAMINATION, THE INSPECTOR NOTED THAT NO MECHANICAL MALFUNCTIONS OR FAILURES WERE IDENTIFIED. THE OAKLAND, CALIFORNIA, AVIATION WEATHER OBSERVATION TAKEN AT 0945 HOURS REPORTED A TEMPERATURE OF 55 DEGREES AND A DEW POINT OF 41 DEGREES. REVIEW OF A CARBURETOR ICING PROBABILITY CHART REVEALED THAT THE TEMPERATURE AND DEW POINT FALLS WITHIN AN AREA DEFINED AS 'SERIOUS ICING - CRUISE OR CLIMB POWER'.
Probable cause
LOSS OF ENGINE POWER DUE TO CARBURETOR ICE. A FACTOR IN THE ACCIDENT WAS THE FAILURE OF THE INSTRUCTOR TO PROPERLY SUPERVISE THE CONDUCT OF THE FLIGHT.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record LAX91LA218
- Event ID
- 20001212X17048
- Case number
- LAX91LA218
- 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: fc9ead99efa5a25e8ab1ac0077f8173036a620109500c2c875f62c13f139fe5d; retrieved 2026-09-23T04:11:14.756Z.