FTW98LA233 · Aeronca 7AC
Aeronca 7AC · Accident: loss of control on ground/water while standing
From 9M8 to an unrecorded destination
Event
- NTSB case
- FTW98LA233
- 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
Aeronca 7AC
- Aircraft type
- Aeronca 7
- 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
- N3504E
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From 9M8To 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) start-up
- 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
- Loss of control on ground/water
- 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
- Ignition system, magneto › Activated
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
The airplane collided with trees following an inadvertent engine start. The pilot stated that the tandem airplane was positioned on a taxiway with the right wheel chocked and his wife seated in the rear seat with her seatbelt fastened. The pilot attempted to start the engine by 'hand propping' several times, but was not successful. He thought that he had 'flooded' the engine and decided to clear the engine by turning the propeller again with the magento OFF, fuel valve CLOSED, and throttle FULL OPEN. The pilot thinks he mistakenly turned the magneto ON, which resulted in the engine starting when he began turning the propeller.
Probable cause
The inadvertent engine start due to the pilot's failure to ensure that the magneto switch was in the OFF position when he was attempting to clear the flooded engine. A factor was the pilot's improper starting procedure, which resulted in flooding the engine.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record FTW98LA233
- Event ID
- 20001211X10083
- Case number
- FTW98LA233
- 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: local date, investigation status. Values present in the bulk record are kept.
- The date is the local date; the NTSB stores the UTC date 1998-05-20.
- API snapshot SHA-256: 884af5d4d03ee88e1f56d66c6f274cc0e7963b305c0c60ee62e15f48b154adfc; retrieved 2026-09-21T11:31:38.272Z.