NTSB investigations: Sikorsky S-55

8 cases on aircraft the registry lists as Sikorsky S-55. 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

19662026

NTSB investigations: Sikorsky S-55 per year, 1966–2026: 8 cases
1966	2
1971	1
1974	1
1981	1
2002	2
2006	1

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."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('8141602')) 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.\"mKey\" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('8141602'))
  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."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('8141602'))
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 LAX06LA280Accident · No injuriesLimited investigationFinal reportSikorsky S-55 · Paramount, CAthe loss of engine power for undetermined reasons. A factor was the unsuitable terrain for the landing.Aug 26, 2006 · N111VA · Substantial damage NTSB LAX02TA267Accident · No injuriesFinal reportSikorsky S-55T · Lytle Creek, CAFailure of the hydraulic system due to contamination in the hydraulic fluid, which resulted in an in-flight loss of control.Aug 30, 2002 · N747A · Substantial damage NTSB ATL02LA130Accident · No injuriesLimited investigationFinal reportSikorsky S-55-QT · Orlando, FLFailure of the cyclic lateral control rod end bearing, and subsequent dynamic rollover.Jun 25, 2002 · N2300Z · Substantial damage NTSB LAX81FA093Accident · 6 fatalClosedSikorsky S-55 · Beaumont, CAMay 29, 1981 · N874 · Destroyed NTSB FTW75DRD18Accident · No injuriesClosedSikorsky S-55 · Gulf Of Mexico (Gulf of Mexico)Dec 2, 1974 · N750A · Substantial damage NTSB NYC72FNA14Accident · Serious injuriesClosedSikorsky S-55 · Acton, MAOct 15, 1971 · N9009R · Destroyed NTSB ANC67A0021Accident · No injuriesClosedSikorsky S-55 · Galena, AKAug 20, 1966 · N747A · Substantial damage NTSB ANC66A0052Accident · No injuriesClosedSikorsky S55 · Kenai, AKJun 29, 1966 · N874 · Substantial damage