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Ongoing NTSB investigations: Lycoming 0-540 series, 2026

17 cases on aircraft whose registry engine model is Lycoming 0-540 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

20242026

Where

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 year(c."eventDate") = 2026 AND c."completionStatus" = 'Ongoing' AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('41532')) 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 year(c.\"eventDate\") = 2026
    AND c.\"completionStatus\" = 'Ongoing'
    AND c.\"mKey\" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('41532'))
  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") = 2026
  AND c."completionStatus" = 'Ongoing'
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('41532'))
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 WPR27LA030Accident · No injuriesClass 4 · LimitedInvestigation openPiper PA-28-235 · Salt Lake City, UTNov 2, 2026 · N8620W · Substantial damage NTSB CEN27FA030Accident · 3 fatalClass 3 · FieldInvestigation openPiper PA-28-235 · Gunnison, COOct 24, 2026 · N8777W NTSB CEN27LA019Accident · No injuriesClass 3 · LimitedPreliminary reportPiper PA-28-235 · Cedar Rapids, IAOn October 18, 2026, about 2015 central daylight time, a Piper PA-28-235 airplane, N8759W, was substantially damaged when it was involved in an accident near Cedar Rapids, Iowa. The flight instructor and student pilot were not injured. The airplane was…Oct 19, 2026 · N8759W · Substantial damage NTSB WPR27LA003Accident · No injuriesClass 4 · LimitedInvestigation openMaule M-5-235C · Agua Dulce, CAOct 3, 2026 · N56328 · Substantial damage NTSB ANC26LA096Accident · Minor injuriesClass 3 · LimitedPreliminary reportCessna R182 · Lebanon, TNOn September 1, 2026, about 1815 eastern daylight time, a Cessna R182 airplane was substantially damaged when it was involved in an accident near Lebanon, Tennessee. The pilot sustained minor injuries. The airplane was operated as a Title 14 Code of Federal…Sep 1, 2026 · N6346T · Substantial damage NTSB ERA26LA321Accident · No injuriesClass 4 · LimitedInvestigation openCessna R182 · Clarksville, TNAug 30, 2026 · N756EB · Substantial damage NTSB ERA26LA312Accident · No injuriesClass 4 · LimitedInvestigation openPiper PA24 · Fort Washington, MDAug 21, 2026 · N6969P · Substantial damage NTSB ERA26LA358Accident · No injuriesClass 3 · LimitedPreliminary reportPiper PA24 · Union City, OHOn August 10, 2026, about 1800eastern daylight time, a Piper PA-24-250, N6985P, was substantially damaged when it was involved in an accident near Union City, Ohio. The flight instructor and the private pilot were not injured. The airplane was operated as a…Aug 10, 2026 · N6985P · Substantial damage NTSB ANC26LA080Accident · Minor injuriesClass 3 · LimitedPreliminary reportPiper PA-32-260 · Pinetown, NCOn August 6, 2026, about 1355 eastern daylight time, a Piper Aircraft PA-32-260 airplane, N8791E, was substantially damaged when it was involved in an accident near Pinetown, North Carolina. The private pilot and two passengers sustained minor injuries. The…Aug 6, 2026 · N8791E · Substantial damage NTSB CEN26LA242Accident · No injuriesClass 3 · LimitedPreliminary reportPiper PA-25-235 · Forest Lake, MNOn July 4, 2026, about 0942 central daylight time, a Piper PA-25-235 airplane, N386AB, was substantially damaged when it was involved in an accident near Forest Lake, Minnesota. The pilot was not injured. The airplane was operated as a Title 14 Code of…Jul 4, 2026 · N386AB · Substantial damage NTSB ERA26FA252Accident · 1 fatalClass 3 · FieldPreliminary reportPiper PA24 · Hazen, NDOn June 28, 2026, about 1317 central daylight time, a Piper PA-24-250, N6852P, was destroyed when it was involved in an accident near Hazen, North Dakota. The pilot was fatally injured. The airplane was operated as a Title 14 Code of Federal Regulations Part…Jun 28, 2026 · N6852P · Destroyed NTSB WPR26FA224Accident · 3 fatalClass 3 · FieldPreliminary reportPiper PA-24-250 · Middlefield, OHOn June 20, 2026, about 1535 eastern daylight time, a Piper PA-24-250, N6403P, was substantially damaged when it was involved in an accident near Middlefield, Ohio. The pilot and two passengers sustained fatal injuries. The airplane was operated as a Title 14…Jun 20, 2026 · N6403P · Substantial damage NTSB ANC26LA053Accident · Minor injuriesClass 3 · LimitedPreliminary reportPiper PA-28-235 · Key West, FLOn June 14, 2026, at 1035 eastern standard time, a Piper PA-28-235 airplane, N15564, was substantially damaged when it was involved in an accident near Key West, Florida. The pilot was not injured and the passenger sustained minor injuries. The airplane was…Jun 14, 2026 · N15564 · Substantial damage NTSB ERA26FA214Accident · 1 fatalClass 3 · FieldPreliminary reportPiper PA-25-235 · Saratoga Springs, NYOn May 26, 2026, about 1347 eastern daylight time, a Piper PA-25-235 airplane, N8656L, was substantially damaged when it was involved in an accident near Saratoga Springs, New York. The pilot was fatally injured. The airplane was operated as a Title 14 Code…May 26, 2026 · N8656L · 2 aircraft · Substantial damage NTSB WPR26FA151Accident · 2 fatalClass 3 · FieldPreliminary reportPiper PA-32R-301T · Marana, AZOn April 08, 2026 at 1710 mountain standard time, a Piper PA-32R-301T, N4190E, sustained substantial damage when it was involved in an accident near Marana, AZ. The pilot and passenger sustained fatal injuries. The airplane was operated as a Title 14 Code of…Apr 9, 2026 · N4190E · Substantial damage NTSB WPR26LA157Accident · No injuriesClass 3 · LimitedPreliminary reportCessna T182 · Marion, MTOn April 8, 2026, about 1315 mountain standard time, a Cessna T182, N5475N, was substantially damaged when it was involved in an accident near Marion, Montana. Both pilots were uninjured. The airplane was operated as a Title 14 Code of Federal Regulations…Apr 8, 2026 · N5475N · Substantial damage NTSB ANC26FA021Accident · 2 fatalClass 3 · FieldPreliminary reportRobinson Helicopter R44 · Boynton Beach, FLOn March 23, 2026, about 1221 eastern daylight time, a Robinson R44 Raven I helicopter, N478AT, was destroyed when it was involved in an accident near Boynton Beach, Florida. The flight instructor and the pilot receiving instruction were fatally injured. The…Mar 23, 2026 · N478AT · Destroyed