# NTSB investigations, MD: 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 ERA18LA211](https://openairdocs.org/ntsb/ERA18LA211.md): Schweizer SGS233 · Churchville, MD · Accident · No injuries · Limited investigation · Final report · Aug 5, 2018 · N2832H · Substantial damage
  > The pilots' decision to take off from a wet, upsloping turf runway with a quartering tailwind and elevated density altitude conditions, which degraded takeoff and climb performance and resulted in the glider flight instructor's decision to discontinue the…
- [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…

## 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 c."eventStateOrRegion" = 'MD' AND c."eventCountry" = 'USA'
  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?state=MD

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