ANC99LA060 · Aeronca 15AC
Aeronca 15AC · Accident: partial loss of engine power (mechanical failure) en route
From Skelton Airport (AK04) to Soldotna Airport (SXQ)
Event
- NTSB case
- ANC99LA060
- 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 15AC
- Aircraft type
- Aeronca 15
- 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
- N1315H
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From Skelton Airport (AK04), AKTo Soldotna Airport (SXQ), Soldotna, 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 · climb to 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
- Partial loss of engine power (mechanical failure)
- 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
- Engine assembly, cylinder › Separation
- Fuel system, line › Burned
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
The certificated commercial pilot reported that while climbing through 7,000 feet msl, he smelled smoke in the airplane, followed by a rough running engine. During an emergency descent, he saw smoke and flames coming from underneath the floor boards adjacent to the rudder pedals. The pilot elected to ditch the airplane in shallow ocean water, just short of the beach. Upon touchdown, the airplane nosed over. The pilot said, in part: 'My legs were on fire and I just wanted to put the fire out, and get the airplane on the ground.' An FAA airworthiness inspector traveled to the accident scene, and examined the airplane wreckage. He said that upon closer inspection of the engine, it was discovered that the top portion of the number three cylinder was separated between the cylinder barrel, and the cylinder head. He added that the main fuel supply line was burned through, and disconnected from the carburetor inlet fitting. In his written statement the FAA inspector wrote, in part: '...the vibration shook loose the left engine exhaust pipe which then directed the exhaust onto the fuel line to the carburetor which caused the fire.'
Probable cause
A separation of the number 3 engine cylinder head assembly, and a burned through fuel line.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record ANC99LA060
- Event ID
- 20001212X18674
- Case number
- ANC99LA060
- 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 1999-05-08.
- API snapshot SHA-256: 96206015b0187bd2d5ca02ef9bf0182c5df443a533ba2568fa45649ee5609778; retrieved 2026-09-21T11:06:10.964Z.