LAX90LA339 · Waco YMS
Waco YMS · Accident: total loss of engine power (non-mechanical) while maneuvering
From Ellison Onizuka Kona International Airport at Keāhole (KOA) to Ellison Onizuka Kona International Airport at Keāhole (KOA)
Narrative check · The NTSB narrative appears to contradict this record's aircraft involved. Values are shown as recorded, not corrected; compare with the narrative.
Event
- NTSB case
- LAX90LA339
- 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
Waco YMS Possible conflict
- Aircraft type
- Waco YMS
- 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
- N40115
- Operator
- Kegel, Gary · private individual
- Onboard fatalities
- Unknown
- Route
- From Ellison Onizuka Kona International Airport at Keāhole (KOA), KEAHOLE APT., HITo Ellison Onizuka Kona International Airport at Keāhole (KOA)
- 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
- Maneuvering
- 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)
- 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 › Carburetor heat, improper use of
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
THE PILOT OF A WACO YMF, N40115, STATED AFTER COMPLETING SEVERAL AEROBATIC MANEUVERS EVERYTHING WAS NORMAL. THE PILOT STATED HE ENTERED ANOTHER LOOP AT 3500 FEET. HE STATED HE ADDED FULL POWER ON THE UP SIDE AND REDUCED POWER TO IDLE ON THE DOWN SIDE. HE STATED AS HE STARTED TO ROUND OUT AT THE BOTTOM OF THE LOOP HE ADDED POWER AND THERE WAS NO RESPONSE. THE TEMPERATURE/DEW POINT SPREAD WAS FOUND TO BE IN 'SERIOUS ICING-GLIDE' RANGE.
Probable cause
IMPROPER USE OF CARBURETOR HEAT RESULTING IN ENGINE FAILURE DUE TO CARBURETOR ICING.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record LAX90LA339
- Event ID
- 20001212X24319
- Case number
- LAX90LA339
- 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: adbc4fcc04303a87baed886c83a50b158dbf2cf63f908f1be1b4b84757338333; retrieved 2026-09-23T05:16:22.050Z.