BFO94LA040 · Hiller UH-12E
Hiller UH-12E · Accident: total loss of engine power (non-mechanical) en route
Event
- NTSB case
- BFO94LA040
- 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
Hiller UH-12E
- Aircraft type
- Hiller UH-12
- Category
- Helicopter
- 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
- N4495M
- Operator
- Stevens, James E. · private individual
- Onboard fatalities
- Unknown
- Route
- From not recordedTo not recorded
- 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
- Total loss of engine power (non-mechanical)
- Also codedOther events the NTSB coded in the sequence, such as a wire strike after a loss of power. Flight Findings uses them for its kinds of event. Glossary
- Tree(s)
- 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
- Pilot in command › Refueling, improper
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
The pilot reported that they landed at the airport to refuel and were going to do a quick turn around. The passenger of the helicopter went into the fueling facility and requested fuel. The type of fuel requested by the passenger was disputed. The pilot stated that he was handed an unmarked nozzle and he proceeded to refuel the helicopter. The pilot stated that he questioned the line service personnel about the different size nozzle and rapid fuel flow rate, and the line service person responded '...that is what is required.' The pilot reported that he did not take any fuel samples after he refueled the helicopter. At the time of the refueling, the fuel tank area at the airport was under construction. The 100 low lead fuel tanks were placarded, but the Jet A fuel tanks were new and the placards were not yet available for display. About four minutes after takeoff, the helicopter's engine lost power. The pilot made an emergency landing in wooded terrain. The pilot and passenger were not injured and the helicopter was substantially damaged. Fuel samples were taken from the helicopter's fuel tank and tested. The fuel tests revealed that the fuel was Jet A and not the required 100 low lead fuel.
Probable cause
the pilot's failure to refuel the helicopter with the correct fuel. Factors in the accident were the unclear information given by the passenger and airport line service personnel, the insufficient information regarding the labeling of the airport's fuel tanks, and the lack of suitable terrain to complete a forced landing without damaging the helicopter.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record BFO94LA040
- Event ID
- 20001206X00707
- Case number
- BFO94LA040
- 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: 1a9e03fa39da57799eccbb4b3923792e5ec26060276800663306bacccf1ed10d; retrieved 2026-09-23T01:20:22.081Z.