ANC11CA005 · Piper PA-18-150
Piper PA-18-150 · Accident: fuel contamination en route
From Minchumina, AK to Chena Marina Airport (AK28)
Event
- NTSB case
- ANC11CA005
- 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
Piper PA-18-150
- Aircraft type
- Piper PA-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
- N40283
- Operator
- Mark A. Keech · private individual
- Onboard fatalities
- Unknown
- Route
- From Minchumina, AKTo Chena Marina Airport (AK28), Fairbanks, AK
- 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
- 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 pilot reported that while in level cruise flight, the airplane's engine began to lose power, and then lost all power. He said he was unable to restart the engine, and selected a snow and tree-covered area as a forced landing site. During the forced landing, the airplane's left wing collided with a tree, resulting in substantial damage to the fuselage, empennage, and left wing. He said that at the time of the accident the outside air temperature was minus 22 degrees F, and that during his postaccident inspection of the airplane he discovered that the engine fuel gascolator filter had become blocked by ice crystals. He stated that there were no preaccident mechanical problems with the airplane, and noted that the accident might have been prevented if he had removed the gascolator during his preflight to check for ice crystals, or preheated the engine, and then drained the water from the gascolator.
Probable cause
The pilot's inadequate preflight inspection, which resulted in a loss of engine power due to water/ice in the fuel system.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record ANC11CA005
- Event ID
- 20101230X03827
- Case number
- ANC11CA005
- 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: 32abd1f5c1babba5e25fc941d25934fa19a13af360c9c5d4212de26d9bee9fe0; retrieved 2026-09-15T15:39:08.877Z.