FTW99LA059 · Cessna 421C
Cessna 421C · Accident: airframe, component or system failure en route
From Lakefront Airport (NEW) to Millard Airport (MLE)
Event
- NTSB case
- FTW99LA059
- 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 421C
- Aircraft type
- Cessna 421
- 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
- N234CG
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From Lakefront Airport (NEW), New Orleans, LATo Millard Airport (MLE), Omaha, NE
- 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
- Airframe, component or system 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
- Electrical system, alternator › Failure
- Electrical system, voltage regulator › Failure
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
During a precautionary landing following a loss of electrical power, the pilot turned the airplane to avoid colliding with a pickup truck, and the airplane impacted trees. The pilot reported that while IMC, at 14,000 feet msl, he started preparing for ice penetration and turned on the two propeller anti-ice switches. The right propeller anti-icing circuit breaker popped, and when the circuit breaker was reset, the airplane experienced a total electrical failure. The pilot initiated an emergency descent, and entered into VFR conditions at about 1,500 feet. After about 30 minutes of trying to locate an airport, with it getting dark and thunderstorms in the area, the pilot elected to land on a narrow road with trees on both sides. Testing of the alternator system revealed discrepancies with the left alternator, both voltage regulators, and the right alternator out sensor.
Probable cause
The total failure of the aircraft's electrical system. Factors were the thunderstorms, the dusk light condition, and the lack of suitable terrain for the precautionary landing.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record FTW99LA059
- Event ID
- 20001204X00054
- Case number
- FTW99LA059
- 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: cc28430742c0747d62aed24bbf8aa375af6c173f78a139d468702814cd66f244; retrieved 2026-09-21T20:37:30.802Z.