DEN93FA066 · Cessna 310J
Cessna 310J · Accident: fire while standing
Event
- NTSB case
- DEN93FA066
- 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 310J
- Aircraft type
- Cessna 310
- 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
- N3005L
- Operator
- Unknown
- 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
- Standing · engine(s) not operating
- 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
- Fire
- DamageDestroyed: beyond practical repair. Substantial: damage that affects the structure, performance or handling and normally needs major repair. Minor: less than that. Glossary
- Destroyed
Cause areas
- Fluid, oil › Contamination
- Other maintenance personnel › Maintenance, service of aircraft/equipment, improper
- Oxygen system › Leak
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
THE PILOT-IN-COMMAND AND INSTRUCTOR-TRAINEE WERE SITTING IN THE COCKPIT DISCUSSING THE LESSON PLAN. THEY SAW FIRE AROUND THE GLARESHIELD AND WINDSHIELD. POST-ACCIDENT INVESTIGATION TRACED THE FIRE PATTERN BACK TO THE NOSEWHEEL WELL AND THE OXYGEN SYSTEM BOTTLE. IT WAS LEARNED THAT THE REGULATOR HAD BEEN LEAKING AND THE ON-OFF CONTROL CABLE WAS BINDING. THE LEAK WAS THOUGHT TO HAVE BEEN FIXED. A MECHANIC SAID HE LUBRICATED THE COCKPIT END OF THE REGULATOR CONTROL. THE AIRCRAFT OWNER SAID THE MECHANIC USED AN AEROSOL CAN TO LUBRICATE SOMETHING IN THE NOSEWHEEL WELL. ACCORDING TO THE FIRE DEPARTMENT'S ARSON SQUAD, THE CAUSE OF THE FIRE WAS 'FRICTION OF ESCAPING OXYGEN IGNITING LUBRICANT ON CABLE.'
Probable cause
FRICTION OF ESCAPING OXYGEN UNDER HIGH PRESSURE IGNITING A LUBRICANT IN THE NOSEWHEEL WELL AREA, AND IMPROPER AIRCRAFT SERVICING BY MAINTENANCE PERSONNEL.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record DEN93FA066
- Event ID
- 20001211X12595
- Case number
- DEN93FA066
- 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: a2622b12dc5b9512d615891eb7d5e44a1bdcca7174a1ce4c9f34cafbf5271756; retrieved 2026-09-21T22:56:08.179Z.