Fatal, Ongoing NTSB investigations: Lycoming TI0-540 series

6 cases on aircraft whose registry engine model is Lycoming TI0-540 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

20252026

Fatal, Ongoing NTSB investigations: Lycoming TI0-540 series per year, 2025–2026: 6 cases
2025	1
2026	5

Where

Open the map

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."highestInjuryLevel" = 'Fatal' 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 ('41533')) 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.\"highestInjuryLevel\" = 'Fatal'
    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 ('41533'))
  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."highestInjuryLevel" = 'Fatal'
  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 ('41533'))
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 ANC26FA091Accident · 4 fatalClass 3 · FieldPreliminary reportPiper PA-24-260 · Seldovia, AKOn August 26, 2026 about 1317 Alaska daylight time, a Piper PA-24-260 airplane, N9485P, was substantially damaged when it was involved in an accident near Seldovia, Alaska. The pilot and three passengers were fatally injured. The airplane was operated as a…Aug 26, 2026 · N9485P · Substantial damage NTSB CEN26FA280Accident · 1 fatalClass 3 · FieldPreliminary reportPiper PA-24-250 · Bethany, MOOn August 4, 2026, about 1839 central daylight time, a Piper PA-24-250 airplane, N8422P, was destroyed when it was involved in an accident near Bethany, Missouri. The pilot received fatal injuries. The airplane was operated under Title 14 Code of Federal…Aug 4, 2026 · N8422P · Destroyed NTSB WPR26FA216Accident · 1 fatalClass 3 · FieldPreliminary reportPiper PA-36-300 · Henderson, NEOn June 11, 2026, at 2103 central daylight time, a Piper PA-36-300, N57846, was substantially damaged when it impacted a rotating beacon tower and terrain near Henderson, Nebraska. The pilot was fatally injured. The airplane was operated as a Title 14 Code of…Jun 12, 2026 · N57846 · Substantial damage NTSB WPR26FA189Accident · 2 fatalClass 3 · FieldPreliminary reportPiper PA-32-300 · Empire, NVOn May 17, 2026, about 0738 PDT, a Piper PA-32-300, N8502N, was substantially damaged when it was involved in an accident near Empire, Nevada. The pilot and passenger sustained fatal injuries. The airplane was operated as a Title 14 Code of Federal…May 17, 2026 · N8502N · Substantial damage NTSB CEN26FA140Accident · 1 fatalClass 3 · FieldPreliminary reportAero Commander 500-B · Chesterfield, MOOn March 17, 2026, about 0024 central daylight time, an Aero Commander 500-B airplane, N444CA, was destroyed when it was involved in an accident near Chesterfield, Missouri. The pilot was fatally injured. The airplane was operated as a Title 14 Code of…Mar 17, 2026 · N444CA · Destroyed NTSB CEN25FA184Accident · 2 fatalClass 3 · FieldPreliminary reportRockwell Commander 114A · Hankamer, TXOn May 24, 2025, about 1658 central daylight time (CDT), a Rockwell Commander 114A airplane, N5903N, was destroyed when it was involved in an accident near Hankamer, Texas. The private pilot and passenger were fatally injured. The airplane was operated under…May 24, 2025 · N5903N · Destroyed