# NTSB investigations, 2011: Glider tow event

NTSB aviation accident and incident investigations since 1962: the probable cause, findings, aircraft, crew, weather and docket of each, linked to the FAA registry and the FAA’s own reports.

## Latest cases

- [NTSB WPR12FA010](https://openairdocs.org/ntsb/WPR12FA010.md): DG Flugzeugbau DG 1000S · Cle Elum, WA · Accident · 1 fatal · Field investigation · Final report · Oct 13, 2011 · N7760A · Substantial damage
  > The pilot’s failure to maintain airspeed and control after takeoff, which resulted in an aerodynamic stall.
- [NTSB CEN11LA585](https://openairdocs.org/ntsb/CEN11LA585.md): Aero Commander Callair A-9B · Marshall, MI · Accident · 1 fatal · Limited investigation · Final report · Aug 21, 2011 · N7638V · Substantial damage
  > The towplane pilot's loss of control during an aerotow operation due to the glider pilot's inability to maintain a proper position behind the towplane while encountering turbulence on initial climb.
- [NTSB ERA11FA413](https://openairdocs.org/ntsb/ERA11FA413.md): Moyes Dragonfly · Ridgely, MD · Accident · 1 fatal · Field investigation · Final report · Jul 23, 2011 · N402HA · Substantial damage
  > An in-flight loss of control for reasons that could not be determined during postaccident examinations.
- [NTSB ERA11FA401](https://openairdocs.org/ntsb/ERA11FA401.md): Slingsby Capstan Type 49B · Hollywood, MD · Accident · 1 fatal · Field investigation · Final report · Jul 15, 2011 · N7475 · Substantial damage
  > The glider pilot’s improper response to the “check spoilers” signal from the tow pilot. Contributing to the accident was the glider pilot’s failure to confirm that the spoilers were closed and locked before takeoff, and the glider copilot’s improper crew…
- [NTSB ERA11LA234](https://openairdocs.org/ntsb/ERA11LA234.md): Let L 33 Solo · New Castle, VA · Accident · 1 fatal · Limited investigation · Final report · Apr 10, 2011 · N286BA · Substantial damage
  > Pilot incapacitation shortly after takeoff for unknown reasons.

## The whole list in SQL

Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS:

```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") = 2011
  AND c."mKey" IN (SELECT s.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' s WHERE s."tier2Number" = '510' AND s.case_mkey IN (SELECT case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' WHERE "isDefiningEvent"))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-events/510/sequence?year=2011

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