WPR25LA004 · Cessna 172L
Cessna 172L · Accident: fuel contamination en route
From Meadows Field (BFL) to Chino Airport (CNO)
Event
- NTSB case
- WPR25LA004
- 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 172L
- Aircraft type
- Cessna 172
- 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
- N7869G
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From Meadows Field (BFL), Bakersfield, CATo Chino Airport (CNO), Chino, CA
- Aircraft age
- About 53 years (built 1971)
- 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
- Defining eventThe 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
- Fuel contamination
- 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
- Aircraft › Fluids/miscellaneous hardware
- Personnel issues › Action/decision
- Personnel issues › Task performance
Approximate · Coordinates from the NTSB case API, which marks them as estimated or does not say; no uncertainty radius is established.
NTSB narrative
The pilot was conducting a night cross-country flight when, about 35 miles from the destination airport, the engine lost total power. The pilot diverted to a nearby airport but overshot the runway during the forced landing and impacted a drainage culvert parallel to the runway as well as a fence, resulting in substantial damage to the fuselage and left-wing spar. A combination of blue-colored fuel, consistent with 100LL aviation fuel, and yellow-colored fuel, consistent in odor and color with fouled automotive fuel, was recovered from the airplane’s fuel tanks. Samples from both fuels tested negative for water contamination. Continuity of the fuel system was established from the main fuel tanks to the carburetor. An external fuel tank was attached to the fuel supply line, and the engine was subsequently started and operated through various power settings for about five minutes with no anomalies. Although the airplane was equipped with a supplemental type certificate that permitted the use of automotive fuel, the owner stated that he only used aviation fuel. It is likely that some of the fouled fuel entered the fuel delivery system and did not support combustion, which resulted in a total loss of engine power; however, the source of the automotive fuel could not be determined. The pilot refueled the airplane with 100LL aviation fuel before departing on the flight, and the manager from that airport reported no anomalies with the fuel supply or delivery system. The pilot did not provide any information regarding his preflight inspection of the airplane before departure.
Probable cause
A total loss of engine power due to contaminated fuel.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record WPR25LA004
- Event ID
- 20241007195265
- Case number
- WPR25LA004
- Dataset
- full-current
- Source SHA-256
- 5cf380f0061817c0331a6b2d8cc7e0ee3a79bea469a1001dc5c10e56f35f5ab3
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, cause areas. Values present in the bulk record are kept.
- The date is the local date; the NTSB stores the UTC date 2024-10-07.
- API snapshot SHA-256: e06d61e4c14a28fbf6f21febda198319f242ae4a3e5611dddca4dd955015f6b1; retrieved 2026-09-16T19:21:14.633Z.