LAX87LA158 · Thorp T-18
Thorp T-18 · Accident: fire en route
From Perris, CA to an unrecorded destination
Event
- NTSB case
- LAX87LA158
- 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
Thorp T-18
- Aircraft type
- Thorp T-18
- 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
- N26CK
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From Perris, 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
- Fire
- 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
- Fuel system, primer system › Leak
- Fuselage, crew compartment › Fire
Approximate · Estimated position: the centre of Riverside, CA, the place the record names. Not the accident site.
NTSB narrative
WHILE ON A FLT TO PRACTICE AEROBATICS, THE PLT WAS FLYING AT 3500' WHEN HE FELT A COLD LIQUID ON HIS RGT LEG & NOTED THE ODOR OF FUEL IN THE COCKPIT. MOMENTS LATER, FLAMES ERUPTED IN THE COCKPIT. THE PLT BAILED OUT & THE AIRPLANE CRASHED ON THE SOUTHEAST SHORE OF LAKE MATHEWS. A POSTCRASH EXAM REVEALED MAJOR HEAT DAMAGE IN THE AREA NEAR THE PRIMER LINES. THE PLT RPRTD THAT THE PRIMER ASSEMBLY HAD LEAKED ON A PREVIOUS OCCASION.
Verbatim NTSB analysis from the NTSB dataset
Sources
NTSB record LAX87LA158
- Event ID
- 20001213X30483
- Case number
- LAX87LA158
- 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 1987-03-28.
- API snapshot SHA-256: 229df9c8ddb60108d043fb5f310e9afad5c99345ba2e805c254c3c2edce0bcf7; retrieved 2026-09-23T13:22:46.707Z.