NTSB investigations: Amateur-built UNKNOWN ENG, 1991
20 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 | 11 |
|---|---|
| 1965 | 12 |
| 1966 | 20 |
| 1967 | 16 |
| 1968 | 7 |
| 1969 | 11 |
| 1970 | 14 |
| 1971 | 16 |
| 1972 | 10 |
| 1973 | 12 |
| 1974 | 17 |
| 1975 | 13 |
| 1976 | 20 |
| 1977 | 19 |
| 1978 | 25 |
| 1979 | 18 |
| 1980 | 20 |
| 1981 | 19 |
| 1982 | 29 |
| 1983 | 21 |
| 1984 | 26 |
| 1985 | 22 |
| 1986 | 27 |
| 1987 | 31 |
| 1988 | 29 |
| 1989 | 15 |
| 1990 | 28 |
| 1991 | 20 |
| 1992 | 22 |
| 1993 | 27 |
| 1994 | 26 |
| 1995 | 31 |
| 1996 | 30 |
| 1997 | 22 |
| 1998 | 30 |
| 1999 | 34 |
| 2000 | 49 |
| 2001 | 45 |
| 2002 | 64 |
| 2003 | 67 |
| 2004 | 58 |
| 2005 | 70 |
| 2006 | 59 |
| 2007 | 74 |
| 2008 | 63 |
| 2009 | 62 |
| 2010 | 62 |
| 2011 | 44 |
| 2012 | 58 |
| 2013 | 43 |
| 2014 | 46 |
| 2015 | 40 |
| 2016 | 39 |
| 2017 | 43 |
| 2018 | 34 |
| 2019 | 40 |
| 2020 | 28 |
| 2021 | 36 |
| 2022 | 41 |
| 2023 | 41 |
| 2024 | 34 |
| 2025 | 32 |
| 2026 | 26 |
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 year(c.\"eventDate\") = 1991
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 year(c."eventDate") = 1991
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 DEN92IA014Incident · No injuriesIncident investigationFinal reportCessna 172RG · Broomfield, COFailure of the left main landing gear pivot assembly due to ductile torsional overstress.NTSB NYC91LA247Accident · Serious injuriesLimited investigationFinal reportMcdonnell Douglas MD-82 · East Boston, MAThe malfunction of an electrical component in the cockpit, which resulted in smoke and the subsequent emergency evacuation of the passengers from the airplane.NTSB ATL91LA165Accident · Serious injuriesLimited investigationFinal reportIcard, Claude M. Sonerai II LT · Morganton, NCThe pilot's failure to maintain directional control of the airplane on the runway, and the inadvertent rotation of the airplane, resulting in an unplanned flight.NTSB CHI91LA263Accident · No injuriesLimited investigationFinal reportBeech 36 · Davenport, IAThe inadequate visual lookout and poor inflight planning and decision making by the pilot of N97867. Factors in the accident are inoperative exterior lights and radio communication not possible.NTSB NYC91DNC04Accident · Minor injuriesFinal reportLaurent A. Cloutier BD-5B · Gilford, NHEngine failure due to a faulty oil pressure relief valve resulting in an emergency landing on unsuitable terrain.NTSB FTW91FA123Accident · 1 fatalField investigationFinal reportHughes 269B · Brickeys, ARThe failure of the clutch control cable due to fraying which initiated the forced landing and the operator's failure to perform recommended inspections on the aircraft. Factors were the pilot's failure to maintain rotor RPM and the unsuitable terrain.NTSB CHI91LA214Accident · No injuriesLimited investigationFinal reportErcoupe 415-C · Sparta, MIInadequate preflight by the pilot and the pilot's failure to reach a proper touchdown point.NTSB ATL91FA117Accident · 2 fatalField investigationFinal reportFuji LM 1 · Keystone Hghts, FLFailure of the number four pilot (in N2100J) to maintain adequate visual lookout and/or clearance from the number three aircraft (N2109L).NTSB CHI91DEP10Accident · No injuriesFinal reportAllan R. Goldman Dragonfly · Kenosha, WIInadequate aircraft design and insufficient information regarding wing versus canard angle for an amateur built aircraft.NTSB CHI91DEP06Accident · No injuriesFinal reportAvid Flyer Avid Flyer · Endeavor, WIThe pilot in command's inability to effectively eliminate carburetor ice to avoid an emergency landing.NTSB NYC91LA143Accident · No injuriesLimited investigationFinal reportCessna 120 · Wellsville, PAA power loss due to a fuel system blockage which resulted in a forced landing.NTSB NYC91DGT04Accident · No injuriesFinal reportGeorge E Heide, JR. Moni Motorglider · Annville, PAThe pilot's intentional landing on unsuitable terrain due to a loss of altitude precipitated by a downdraft.NTSB SEA91LA106Accident · No injuriesLimited investigationFinal reportBeech A36 · Rawlins, WYThe pilot's lack of familiarity with the aircraft, his lack of understanding of the electrical system, and a premature precautionary landing. Contributing to the accident were an alternator failure and the resultant false readings of the powerplant…NTSB ATL91LA093Accident · Minor injuriesLimited investigationFinal reportCessna 172I · Clanton, ALFailure of the pilot to maintain control of the aircraft during a go-around. The pilot's lack of experience was a related factor.NTSB MIA91LA127Accident · No injuriesLimited investigationFinal reportTravel Air 2000 · Homestead, FLAn on ground encounter with weather conditions that were favorable for carburetor icing at a low power setting (glide power), and failure of the pilot to abort the takeoff after recognizing that the eng was not developing full power during the initial climb.NTSB SEA91LA092Accident · Minor injuriesLimited investigationFinal reportSmelser KR-2 · Spokane, WAA failure of the fuel drain valve which resulted in fuel exhaustion and a loss of engine power.NTSB LAX91LA175Accident · Serious injuriesLimited investigationFinal reportSnider RV6 · Paulden, AZThe pilot's poor preflight preparation and his failure to ensure that the fuel selector was properly positioned for flight.NTSB SEA91LA083Accident · No injuriesLimited investigationFinal reportAeronca 11AC · Port Orchard, WAThe loss of engine power due to contaminated fuel system.NTSB ATL91LA076Accident · No injuriesLimited investigationFinal reportDavid Lowe ULTRA-PUP · Waycross, GAThe failure of the airplane battery, which prohibited the complete extension of the landing gear, resulting in a landing with the nose gear retracted. A factor in the accident was the soft terrain at the selected landing area.NTSB LAX91LA120Accident · No injuriesLimited investigationFinal reportBoeing A75 · Marana, AZThe failure of the pilot in the trailing airplane to maintain clearance from the lead airplane.