CEN18LA113 · Aero Commander 100-180
Aero Commander 100-180 · Accident: fuel contamination before flight
From Cox Field (PRX) to Cox Field (PRX)
Event
- NTSB case
- CEN18LA113
- 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
Aero Commander 100-180
- Aircraft type
- Aero Commander 100
- 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
- N3733X
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From Cox Field (PRX), Paris, TXTo Cox Field (PRX), Paris, TX
- Aircraft age
- About 50 years (built 1968)
- 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
- Prior to flight
- 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 › Task performance
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
The private pilot reported that the airplane had been parked outside and exposed to an extended period of rainfall in the days leading to the accident. On the day before the accident, the pilot drained nearly 2 gallons of water from the fuel system before he saw clean, blue fuel. He subsequently repositioned the airplane on the ramp to see if he could get more water out of the tanks and installed new gaskets for the fuel caps. On the day of the accident, the pilot sumped the fuel system and found a small amount of water during the first check but reported that it was clear on the second check. During the pre-takeoff engine run-up, the airplane operated normally, and the pilot chose to depart.
About 25 minutes after takeoff, the pilot executed a steep turn about 500 ft above ground level. About 1 minute after leveling off, the engine sputtered once and experienced a total loss of power. His attempt to restart the engine was unsuccessful. The pilot performed a forced landing to a field but was unable to stop the airplane before hitting trees during the landing roll. He reported that there were no mechanical malfunctions or failures with the airplane that would have precluded normal operation before the loss of engine power. Postaccident examination of the airplane revealed that the right wing was separated from the airframe and contained no fuel. The left wing was about 1/2 full, but the fuel was not sampled. The fuel filler neck and cap showed large amounts of rust, indicative of inadequate maintenance of the fuel caps, which would have allowed water to enter the neck and tanks. It is likely that precipitation entered the fuel system around the poorly-maintained fuel filler and cap, which resulted in water contamination of the fuel, and that there was water remaining in the system even after the pilot drained large amounts of water before the flight, which resulted in the subsequent loss of engine power.
Probable cause
A total loss of engine power due to water contamination of the fuel system. Contributing to the accident was the pilot/owner's inadequate maintenance of the fuel caps.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record CEN18LA113
- Event ID
- 20180305X05731
- Case number
- CEN18LA113
- 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: a7210cfa3d711c237a331e9b11a9f842a96f77a2c7c46afb745b3d09e35c21b6; retrieved 2026-09-16T06:34:19.198Z.