NTSB investigations: Let BLANIK L-13

6 cases on aircraft the registry lists as Let BLANIK L-13, where the first occurrence was “Miscellaneous/other”. 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

19822026

NTSB investigations: Let BLANIK L-13 per year, 1982–2026: 6 cases
1982	1
1984	1
1986	1
1991	1
1995	1
2001	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 ('1360306') AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o.case_mkey = x.case_mkey AND o.aircrafts_position = x.position AND o."occurrenceNumber" = 1 AND o."occurrenceCode" = 430)) 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 ('1360306')
      AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o.case_mkey = x.case_mkey AND o.aircrafts_position = x.position AND o.\"occurrenceNumber\" = 1 AND o.\"occurrenceCode\" = 430))
  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 ('1360306')
    AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o.case_mkey = x.case_mkey AND o.aircrafts_position = x.position AND o."occurrenceNumber" = 1 AND o."occurrenceCode" = 430))
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 SEA01LA153Accident · Serious injuriesLimited investigationFinal reportLet Blanik L-13 · Enumclaw, WAThe premature release of the towline and the pilot's improper selection of a landing area following the release. Factors include improper preflight planning.Aug 19, 2001 · N82AS · Substantial damage NTSB ATL95LA080Accident · No injuriesLimited investigationFinal reportLet Blanik L-13 · Brownsboro, ALThe student pilot's inadvertent use of spoilers during takeoff. Factors related to the accident were: the glider instructor's failure to identify the extended spoilers, and the proximity of trees in the emergency landing area.Apr 8, 1995 · N48039 · Substantial damage NTSB CHI91LA231Accident · No injuriesLimited investigationFinal reportLet L-13 · Gregory, MIA collision with wires after the glider overshot the landing area due to inadvertent lowering of the flaps and no use of spoilers.Jul 26, 1991 · N781BA · Substantial damage NTSB MIA86LA070Accident · No injuriesLimited investigationFinal reportLet L-13 · Brooksville, FLThe pilot stated that he encountered sinking air & was unable to make the arpt. He also stated that he was operating east of the arpt & that a seabreeze wind from the west existed at the time of the accident. The effective glide ratio of a glider is reduced…Feb 2, 1986 · N26TS · Substantial damage NTSB ATL84LA300Accident · No injuriesLimited investigationFinal reportLet L-13 · Warrenton, VAThe plt inadvertantly deployed the flaps on final apch instead of the spoilers. The glider overshot the airstrip touching down in rough terrain off the departure end.Aug 25, 1984 · N14YA · Substantial damage NTSB CHI82DA177Accident · Minor injuriesFinal reportBlanik L-13 · Warren, MNThe pilot was having difficulty controlling the glider during the tow and released prematurely. The destination was 12 to 14 miles away with 10-15 kt headwinds. When the pilot decided the destination could not be made a road was selected for a forced landing…May 20, 1982 · N99805 · Substantial damage