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NTSB investigations: Lycoming IO-320 series, IL

33 cases on aircraft whose registry engine model is Lycoming IO-320 series. 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.

Defining event

Finding

Phase of flight

Aircraft model

Cases per year

19642026

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Latest cases

Query with SQL

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" = 'IL' 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 ('41509')) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC

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\" = 'IL' 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 ('41509'))
  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" = 'IL' 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 ('41509'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC

Run 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 CEN26FA064Accident · 2 fatalClass 3 · FieldPreliminary reportPiper PA-30 · West Chicago, ILOn December 17, 2025, about 1349 central standard time, a Piper PA-30 airplane, N8693Y, was substantially damaged when it was involved in an accident near West Chicago, Illinois. The pilot and pilot-rated passenger were fatally injured. The airplane was…Dec 17, 2025 · N8693Y · Substantial damage NTSB CEN23LA002Accident · No injuriesClass 4 · LimitedFinal reportChampion 7KCAB · Danville, ILThe pilot decision to perform a precautionary landing to a field with obstacles which resulted in a ground loop. Contributing was the pilot’s inadequate fuel planning.Oct 2, 2022 · N869TT · Substantial damage NTSB GAA18CA360Accident · No injuriesData collectionFinal reportCessna 172 · Salem, ILThe student pilot’s failure to maintain clearance from a pole while taxiing the airplane on the ramp.Jun 14, 2018 · N98395 · Substantial damage NTSB CEN16FA276Accident · 1 fatalField investigationFinal reportPiper PA 30 · Plainfield, ILThe pilot's failure to maintain airplane control during an en route climb near convective activity, which resulted in an aerodynamic stall, an uncontrolled descent, and a subsequent in-flight breakup due to an exceedance of the airplane's design load…Jul 21, 2016 · N7409Y · Destroyed NTSB CHI03LA212Accident · No injuriesLimited investigationFinal reportCessna 172P · Pinckneyville, ILThe planned approach not maintained by the pilot and the delayed remedial action by the certified flight instructor. A contributing factor to the accident was the approach light.Jul 14, 2003 · N98395 · Substantial damage NTSB CHI97LA247Accident · No injuriesLimited investigationFinal reportChampion 7KCAB · Hampshire, ILthe pilot's failure to maintain directional control of the airplane during landing, and his excessive use of brakes, which resulted in a nose over. Factors relating to the accident were: the crosswind condition, and the pilot's lack of experience in the make…Aug 5, 1997 · N5066X · Substantial damage NTSB CHI89LA007Accident · No injuriesLimited investigationFinal reportCessna 172 · Carbondale, ILThe student pilot, while on the takeoff roll on his first solo flight, experienced a loss of directional control which he failed to correct. The aircraft swerved to the left and departed the runway, striking a VASI installation before coming to a stop. The…Oct 9, 1988 · N98395 · Substantial damage NTSB CHI88LA022Accident · No injuriesLimited investigationFinal reportPiper PA-30B · Decatur, ILThe aircraft experienced a landing with the gear retracted. The pilot stated that he perceived the yellow light indication for the landing gear to mean 'down', instead of looking for a green light.Nov 10, 1987 · N7865Y · Substantial damage NTSB CHI82DA250Accident · No injuriesFinal reportPiper PA-30-160 · Salem, ILPilot stated he had 3 green gear lights. During touchdown and roll the landing gear collapsed. The landing gear control switch collar was defective and if the pilot did not hold the gear selector in the down position it may have returned to off before the…Jul 15, 1982 · N7047Y · Substantial damage NTSB CHI80FEE11Accident · No injuriesClosedPiper PA-30 · Chicago, ILDec 6, 1979 · N7119Y · Substantial damage NTSB CHI79DEV08Accident · No injuriesClosedBellanca 7G · Meredosia, ILDec 19, 1978 · N53815 · Substantial damage NTSB CHI79FEE16Accident · No injuriesClosedPiper PA-30 · Kankakee, ILDec 16, 1978 · N8143Y · Substantial damage NTSB CHI78DEE71Accident · No injuriesClosedThorp T-18 · Schaumburg, ILSep 1, 1978 · N711RF · Substantial damage NTSB CHI78FEE58Accident · No injuriesClosedPiper PA-30 · Wheeling, ILJul 26, 1978 · N8788Y · Substantial damage NTSB CHI78DEE57Accident · No injuriesClosedPiper PA-30 · Monee, ILMar 6, 1978 · N8665Y · Substantial damage NTSB CHI76AC075Accident · 4 fatalClosedPiper PA-30 · Joliet, ILJul 1, 1976 · N7332Y · Destroyed NTSB CHI75FEE08Accident · No injuriesClosedPiper PA-30 · Chicago, ILAug 1, 1974 · N1188Y · Substantial damage NTSB CHI74FEV32Accident · No injuriesClosedPiper PA-30 · Peoria, ILDec 23, 1973 · N7087Y · Substantial damage NTSB CHI72DEV27Accident · No injuriesClosedPiper PA-30 · Urbana, ILApr 12, 1972 · N1188Y · Substantial damage NTSB CHI72FEV21Accident · No injuriesClosedPiper PA-30 · Effingham, ILJan 17, 1972 · N7216Y · Substantial damage NTSB CHI72FEV08Accident · No injuriesClosedPiper PA-30 · Bloomington, ILAug 6, 1971 · N7696Y · Substantial damage NTSB CHI70FBD22Accident · No injuriesClosedPiper PA-30 · Dixon, ILApr 3, 1970 · N7875Y · Substantial damage NTSB CHI69F0085Accident · No injuriesClosedPiper PA-30 · Clinton, ILJul 8, 1968 · N7656Y · Substantial damage NTSB CHI68F0742Accident · No injuriesClosedPiper PA-30 · Wheeling, ILMay 11, 1968 · N7805Y · Substantial damage NTSB CHI68A0082Accident · 2 fatalClosedPiper PA-30 · Alton, ILMar 16, 1968 · N7643Y · Destroyed NTSB CHI68F0563Accident · No injuriesClosedPiper PA-30 · Bloomington, ILJan 24, 1968 · N7626Y · Substantial damage NTSB CHI67A0077Accident · Serious injuriesClosedPiper PA-30B · Bloomington, ILDec 16, 1966 · N8162Y · Substantial damage NTSB CHI67F0450Accident · No injuriesClosedPiper PA-30 · Albion, ILApr 26, 1966 · N7966Y · Substantial damage NTSB CHI66F0145Accident · No injuriesClosedPiper PA-30 · Wheeling, ILJul 23, 1965 · N7805Y · Substantial damage NTSB CHI66F0085Accident · No injuriesClosedPiper PA-30 · Chicago, ILJun 24, 1965 · N7544Y · Substantial damage NTSB CHI65F0139Accident · Minor injuriesClosedPiper PA-30 · Urbana, ILMar 9, 1965 · N7495Y · Substantial damage NTSB UNK65X1081Accident · No injuriesClosedPiper PA30 · Chicago, ILDec 21, 1964 · N7495Y · Substantial damage NTSB UNK64X2695Accident · No injuriesClosedPiper PA30 · Lansing, ILJul 7, 1964 · N7139Y · Substantial damage