CEN13FA440 · Phelps KITFOX III
Phelps KITFOX III · Accident: loss of engine power (total) en route
From La Porte Municipal Airport (PPO) to Wittman Regional Airport (OSH)
Event
- NTSB case
- CEN13FA440
- 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
Phelps KITFOX III
- Aircraft type
- Phelps KITFOX
- 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
- N873RX
- Operator
- Phelps Rex D
- Onboard fatalities
- Unknown
- Route
- From La Porte Municipal Airport (PPO), La Porte, INTo Wittman Regional Airport (OSH), Oshkosh, WI
- 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
- 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
- Loss of engine power (total)
- 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 › Aircraft systems
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
The airplane was about 1,000 feet above ground level when the engine experienced a loss of power. The pilot was able to momentarily regain engine power twice before the engine lost total power. The pilot performed a forced landing in a field. The airplane's nose impacted terrain, which pushed the engine rearward and buckled the structure under the forward cockpit area. A postaccident examination revealed that the left wing fuel tank was nearly full, and the fuel line connecting the left wing fuel tank to the header tank had softened at the installation bend, which allowed the fuel line to kink and shut off the fuel supply from the left wing tank. The right wing and header fuel tanks were empty, and the fuel line from the right tank was intact and functioned normally. The fuel system on newer models of the accident airplane have been modified to include a 90-degree elbow fitting, which prevents the tight bend in the fuel line from the wing tanks to the header tank.
Probable cause
The degraded fuel line, which prevented fuel from the left tank from reaching the header tank and resulted in the loss of engine power due to fuel starvation.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record CEN13FA440
- Event ID
- 20130728X84310
- Case number
- CEN13FA440
- 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: 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: caecf4d179c41bc0b95c2074c60de63ad8b32122b18248f85f706e770ff8395b; retrieved 2026-09-15T22:20:44.816Z.