FTW90LA064 · Piper PA-28-140
Piper PA-28-140 · Accident: partial loss of engine power (mechanical failure) en route
From 23F · Keller, TX to 23F
Event
- NTSB case
- FTW90LA064
- 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-28-140
- Aircraft type
- Piper PA-28
- 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
- N33052
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From 23F · Keller, TXTo 23F
- 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
- Partial loss of engine power (mechanical failure)
- Also codedOther events the NTSB coded in the sequence, such as a wire strike after a loss of power. Flight Findings uses them for its kinds of event. Glossary
- Stall
- 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, valve, exhaust › Failure, total
- Pilot in command › Airspeed(vs), not maintained
- Pilot in command › Stall, inadvertent
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
THE AIRPLANE WAS SUBSTANTIALLY DAMAGED WHEN IT COLLIDED WITH THE GROUND AFTER THE PILOT STALLED IT AND LOST CONTROL DURING A PRECUATIONARY LANDING FOLLOWING A PARTIAL LOSS OF POWER DUE TO A FAILURE OF THE #4 EXHAUST VALVE. INITIALLY THE PILOT WAS GOING TO MAKE A PRECAUTIONARY LANDING AT A NEARBY AIRPORT, HOWEVER, WHEN HE TURNED FINAL HE SAW THAT HE HAD OPPOSING TRAFFIC. HE TURNED AWAY FROM THE FINAL APPROACH COURSE AND ENCOUNTERED HIGH TENSION LINES THAT HE COULD NOT CLEAR. THE PILOT THEN TURNED BACK TOWARD THE AIRPORT. DURING THE SECOND TURN, THE AIRPLANE STALLED AND IMPACTED THE GROUND IN A NOSE DOWN ATTITUDE. DUE TO SMEARING OF THE FRACTURE SURFACES THE ORIGIN OF THE FAILURE OF THE VALVE COULD NOT BE DETERMINED.
Probable cause
THE PARTIAL POWER LOSS DUE TO A FAILED EXHAUST VALVE AND THE FAILURE OF THE PILOT TO MAINTAIN ADEQUATE SPEED DURING THE PRECAUTIONARY LANDING APPROACH.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record FTW90LA064
- Event ID
- 20001212X22564
- Case number
- FTW90LA064
- 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 1990-02-05.
- API snapshot SHA-256: 0a012b33767afd7b66e55dca2b4976c715d1a398bf4f55626d0dfae08bf7355e; retrieved 2026-09-21T23:57:37.287Z.