CHI99LA270 · Beech C23
Beech C23 · Accident: loss of engine power en route
From SKY · Sandusky, OH to Appleton International Airport (ATW)
Event
- NTSB case
- CHI99LA270
- 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
Beech C23
- Aircraft type
- Beechcraft 23
- 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
- N24670
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From SKY · Sandusky, OHTo Appleton International Airport (ATW), Appleton, WI
- 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
- Loss of engine power
- 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
- Reason for occurrence undetermined
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
After experiencing an engine failure, the pilot ditched the aircraft into Lake Michigan. During a telephone interview, the pilot stated that, during the flight, he noticed the fuel quantity, as indicated by the fuel gauge, was decreasing even though the fuel selector was positioned for the left tank. The pilot stated that he decided not to change fuel settings since the engine was still running. The pilot stated that while continuing to monitor the fuel status, he noticed that the right fuel tank quantity continued to decrease and the left fuel tank quantity had actually risen. The pilot stated that he continued to monitor the fuel status until the right fuel gauge read empty, at which time the engine quit. The pilot stated that he tried several times to restart the engine with differing fuel selector settings, but was unable to get the engine to run for more than a few seconds. The pilot stated that he had filled the fuel tanks prior to departure. Fuel receipts from the departure airport indicate that the aircraft was fueled with 19.6 gallons of fuel. As of December 27, 1999, the aircraft has not been recovered from Lake Michigan.
Probable cause
the loss of engine power for undetermined reasons.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record CHI99LA270
- Event ID
- 20001212X19222
- Case number
- CHI99LA270
- 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 1999-07-31.
- API snapshot SHA-256: f533febc3ddc7085eadb676b1354d27f56dd63aa606435b12a1b536c2d682f4c; retrieved 2026-09-21T20:27:02.780Z.