CHI97LA050 · Piper PA-46
Piper PA-46 · Accident: total loss of engine power (mechanical failure) en route
From Fuller Airport (4D8) to RDK
Event
- NTSB case
- CHI97LA050
- 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
Piper PA-46
- Aircraft type
- Piper PA-46
- 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
- N446RD
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From Fuller Airport (4D8), Milford, IATo RDK
- 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 · descent
- 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 (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
- Pilot in command › Aircraft preflight, inadequate
- Pilot in command › Precautionary landing, not performed
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
The temperature at takeoff was about 0 degrees F. The aircraft had been kept in an unheated hangar. An oil heater was installed on the aircraft. Oil pressure was in the yellow arc during departure and it stayed in the yellow arc during the flight. The pilot continued the flight although suitable airports were available for precautionary landings. After about 30 to 45 minutes of flight, the prop started surging and the oil pressure went 'way down.' After about a minute, the engine started knocking and quit. The pilot executed a forced landing. After the accident, oil was all over the top of the engine, the oil cap was on tight, and about 4 quarts of oil still showed on the oil dipstick. The engine inspection revealed a hole in the crankcase above the number 2 and 4 cylinders. The number 2, 3, and 5 connecting rod bearings were burned with signs of meltdown. The number 4 connecting rod and bearing had separated from the crankshaft and exhibited heat damage and failure. The oil passages were checked and no obstructions were found. The oil cooler was checked and fluids flowed through the cooler.
Probable cause
the pilot's inadequate preflight and failure to make a precautionary landing. Additional factors included oil starvation and the failed connecting rod and rod bearing.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record CHI97LA050
- Event ID
- 20001208X07148
- Case number
- CHI97LA050
- 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: 116e561cdddbcb6d3bac6eee0aec4ac9e3611956ffa8a4b2640657b62af2af6d; retrieved 2026-09-22T20:36:20.499Z.