LAX94LA263 · Piper PA-28-235
Piper PA-28-235 · Accident: loss of engine power en route
From Round Valley Airport (O09) to Oakland San Francisco Bay Airport (OAK)
Event
- NTSB case
- LAX94LA263
- 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
Piper PA-28-235
- Aircraft type
- Piper PA-28
- 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
- N8549C
- Operator
- Alfredo Matteoni
- Onboard fatalities
- Unknown
- Route
- From Round Valley Airport (O09), Covelo, CATo Oakland San Francisco Bay Airport (OAK), Oakland, 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
- 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
- Substantial
Cause areas
- Reason for occurrence undetermined
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
The pilot reported he was cruising at 5,500 feet when the engine sputtered a couple of times. He looked at the fuel pressure gauge, and pressure was decreasing. After turning on the fuel pump, the pilot switched fuel tanks from the left main to the right main, and the engine did not respond. The pilot said he then shut everything off and made a forced landing in a river bed. An examination of the engine established aircraft electrical and fuel continuity. No visible signs of detonation were observed in the engine cylinders. No obstructions were noted in the fuel lines. The engine was started and run for 15 minutes at 3 different power combinations.
Probable cause
LOSS OF ENGINE POWER FOR AN UNKNOWN REASON.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record LAX94LA263
- Event ID
- 20001206X01579
- Case number
- LAX94LA263
- 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: c825458cdef223d40d029ef55dc0646e7c3b8b104b9fa238df9726cf0a45c8bd; retrieved 2026-09-23T00:59:26.970Z.