NTSB investigations: Amateur-built UNKNOWN ENG, OK
29 cases on aircraft whose registry engine model is Amateur-built UNKNOWN ENG. Aircraft are matched to the registry by N-number and event date, checked against the reported serial number, make and model, so older matches can be wrong.
Cases per year
| 1964 | 1 |
|---|---|
| 1966 | 1 |
| 1970 | 1 |
| 1971 | 1 |
| 1972 | 1 |
| 1973 | 1 |
| 1978 | 1 |
| 1990 | 1 |
| 1993 | 1 |
| 1995 | 1 |
| 2000 | 1 |
| 2001 | 1 |
| 2002 | 1 |
| 2004 | 2 |
| 2005 | 1 |
| 2007 | 1 |
| 2008 | 1 |
| 2013 | 2 |
| 2015 | 1 |
| 2016 | 1 |
| 2020 | 1 |
| 2022 | 2 |
| 2023 | 2 |
| 2025 | 2 |
Where
Open the mapLatest cases
Query with SQL
duckdb -csv -c "SELECT c.\"ntsbNumber\", c.\"eventDate\", c.\"eventType\", c.\"eventCity\", c.\"eventStateOrRegion\", a.n_number, a.\"aircraftMake\", a.\"aircraftModel\", c.\"highestInjuryLevel\", c.\"totalFatal\", c.\"completionStatus\", c.report_url
FROM 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c LEFT JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = c.\"mKey\" AND a.position = 1
WHERE c.\"eventStateOrRegion\" = 'OK' AND c.\"eventCountry\" = 'USA'
AND c.\"mKey\" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('99999'))
ORDER BY c.\"eventDate\" DESC, c.\"ntsbNumber\" DESC"Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.
SELECT c."ntsbNumber", c."eventDate", c."eventType", c."eventCity", c."eventStateOrRegion", a.n_number, a."aircraftMake", a."aircraftModel", c."highestInjuryLevel", c."totalFatal", c."completionStatus", c.report_url
FROM 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c LEFT JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = c."mKey" AND a.position = 1
WHERE c."eventStateOrRegion" = 'OK' AND c."eventCountry" = 'USA'
AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('99999'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESCRun it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.
NTSB CEN26LA054Accident · Minor injuriesClass 4 · LimitedFinal reportLou Malinchak Titan T-51D · Bristow, OKThe collision with two deer during takeoff which resulted in a loss of control and impact with terrain.NTSB CEN25LA123Accident · Minor injuriesClass 4 · LimitedFinal reportCaldwell C W 162F · Mounds, OKThe student pilot’s failure to maintain control of the helicopter during a precautionary landing, which resulted in a dynamic roll over and postimpact fire.NTSB CEN23LA327Accident · Minor injuriesClass 3 · LimitedFinal reportVans RV10 · Chouteau, OKThe total loss of engine power as a result of a failed positive crankcase ventilation (PCV) valve and a subsequent impact with terrain.NTSB CEN23LA152Accident · Minor injuriesClass 3 · LimitedFinal reportVans RV6 · Goldsby, OKThe engine electronic ignition system became disconnected, which resulted in a partial loss of engine power.NTSB CEN22LA438Accident · No injuriesClass 4 · LimitedFinal reportShirey David A Fisher Celebrity · Haskell, OKThe inflight fire for reasons that could not be determined.NTSB CEN22LA411Accident · No injuriesClass 4 · LimitedFinal reportCessna T210L · Atoka, OKThe pilot's failure to land the airplane within the desired touchdown zone, which resulted in a long landing and collision with a fence.NTSB CEN21LA074Accident · No injuriesClass 4 · LimitedFinal reportZlin Savage Cub-S · Francis, OKThe pilot’s selection of unsuitable terrain for the landing, which resulted in a nose over when the airplane encountered soft sand during the landing roll.NTSB CEN16FA307Accident · 1 fatalField investigationFinal reportWilson BUGATTI-DEMONGE 100P · Burns Flat, OKThe pilot's failure to maintain airspeed following an engine anomaly during the initial climb after takeoff, which resulted in the airplane exceeding its critical angle of attack and experiencing an aerodynamic stall. Contributing to the accident was an…NTSB CEN15CA168Accident · No injuriesData collectionFinal reportJones Ronald C Bearhawk · Walters, OKThe pilot did not maintain control of the airplane during the landing roll at night on an unlit grass strip.NTSB CEN14FA046Accident · 1 fatalField investigationFinal reportMitsubishi MU 2B-25 · Owasso, OKThe pilot's loss of airplane control during a known one-engine-inoperative condition. The reasons for the loss of control and engine shutdown could not be determined because the airplane was not equipped with a crash-resistant recorder and postaccident…NTSB CEN13FA465Accident · 1 fatalField investigationFinal reportAir Tractor AT-400 · Balko, OKThe pilot's failure maintain clearance from a meteorological tower while en route at a low altitude. Contributing to the accident was the sun's glare.NTSB DFW08CA229Accident · No injuriesData collectionFinal reportSukhoi SU-31M · Collinsville, OKThe pilot's failure to maintain clearance from marked transmission lines while on final approach.NTSB DFW07FA071Accident · 1 fatalField investigationFinal reportStevens KB-2 · Oklahoma City, OKThe pilot's failure to maintain control of the gyroplane while in the traffic pattern. Contributing to the accident was the high wind with terrain induced turbulence and the absence of the gyroplane's horizontal stabilizer.NTSB DFW05LA187Accident · 1 fatalLimited investigationFinal reportYakovlev Yak 52 · Claremore, OKThe pilot's failure to obtain adequate airspeed while executing a low altitude aerobatic maneuver, which resulted in an aerodynamic stall while inverted. A factor was the low altitude.NTSB DFW05LA012Accident · 1 fatalLimited investigationFinal reportHuber DR 107 · Fletcher, OKThe pilot's inadequate planning/decision to conduct an aerobatic maneuver without sufficient altitude to recover.NTSB FTW04FA167Accident · 2 fatalField investigationFinal reportBell 206B · Cushing, OKthe pilot's inadequate in-flight planning/decision and his failure to maintain obstacle clearance. Contributing factors were low altitude flight, sun glare, and the static wires.NTSB FTW02LA223Accident · No injuriesLimited investigationFinal reportPiper PA-36-285 · Altus, OKThe loss of engine power as a result of the fracture of a compressor turbine blade due to fatigue. A contributing factor was the lack of suitable terrain for the forced landing.NTSB FTW01LA120Accident · No injuriesLimited investigationFinal reportKirchner Pietenpol Aircamper · Tulsa, OKthe pilot's inadequate flare during the forced landing, which resulted in a hard landing. A contributing factor was the engine overheating due a stuck oil cooler thermostat valve, which resulted in a loss of power.NTSB FTW00LA251Accident · No injuriesLimited investigationFinal reportBeech BE58 · Bethany, OKthe fire, which ignited in the engine compartment for undetermined reasons while taxiing.NTSB FTW95LA244Accident · 1 fatalLimited investigationFinal reportWalter W. Bell Lazer Edge · El Reno, OKThe pilot's failure to maintain control resulting in an inadvertent stall/spin. Factors were the pilot's performance of aerobatic maneuvers at the low altitude.NTSB DEN93FA075Accident · 1 fatalField investigationFinal reportWiley Pitts S-1-E · Walters, OKPerformance of an aerobatic maneuver at an altitude insufficient for adequate terrain clearance.NTSB FTW90DPJ08Accident · 1 fatalFinal reportDe Havilland Venom 112 MK4 · Muskogee, OKThe pilot's premature rotation and the subsequent stall. A factor was the pilot's lack of experience in the airplane.NTSB FTW78FPM21Accident · Serious injuriesClosedSemco Chlngr · Tulsa, OKNTSB FTW74FPM15Accident · No injuriesClosedHughes 269B · Tulsa, OKNTSB FTW72FPM33Accident · No injuriesClosedBoeing A75 · Blocker, OKNTSB FTW71FPM24Accident · No injuriesClosedAeronca 11AC · Vinita, OKNTSB FTW70FPM07Accident · No injuriesClosedAeronca 11AC · Grove, OKNTSB FTW67A0067Accident · No injuriesClosedCessna P206 · Chickasha, OKNTSB UNK65X0992Accident · 2 fatalClosedRyan ST3KR · Altus, OK