# NTSB investigations: Schweizer SGS 2-33A, CO

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 WPR26LA273](https://openairdocs.org/ntsb/WPR26LA273.md): Schweizer SGS 2-33A · Boulder, CO · Accident · Minor injuries · Class 4 · Limited · Final report · Jul 7, 2026 · N2793H · Substantial damage
  > The pilot’s improper landing flare which resulted in a stall and a hard bounced landing.
- [NTSB CEN24LA133](https://openairdocs.org/ntsb/CEN24LA133.md): Schweizer SGS 2-33A · Falcon, CO · Accident · Minor injuries · Class 4 · Limited · Final report · Mar 12, 2024 · N2905H · Substantial damage
  > The flight instructor’s failure to maintain control during takeoff which resulted in an aerodynamic stall and an impact with terrain.
- [NTSB DEN08CA157](https://openairdocs.org/ntsb/DEN08CA157.md): Schweizer SGS 2-33A · Boulder, CO · Accident · No injuries · Data collection · Final report · Sep 9, 2008 · N17939 · Substantial damage
  > The pilot's failure to use the dive brake during landing resulting in a long landing and collision.
- [NTSB DEN86LA226](https://openairdocs.org/ntsb/DEN86LA226.md): Schweizer SGS 2-33A · Durango, CO · Accident · No injuries · Limited investigation · Final report · Aug 9, 1986 · N7590 · Substantial damage
  > The plt was attempting to land his glider. He said that he was unable to reach the airport and elected to land in a nearby pasture. Prior to touchdown he discovered some cattle in the field but was unable to avoid a collision with one of the animals. The…
- [NTSB DEN84LA009](https://openairdocs.org/ntsb/DEN84LA009.md): Schweizer SGS 2-33A · Falcon, CO · Accident · No injuries · Limited investigation · Final report · Oct 16, 1983 · N1232S · Substantial damage
  > During the descent for landing, the plt observed that the wind was from the south. The plt decided to land downwind in the upsloping direction of the glider strip rather than upwind in the downsloping direction. He made his base leg too close to the strip &…
- [NTSB DEN83LA210](https://openairdocs.org/ntsb/DEN83LA210.md): Schweizer SGS 2-33A · Durango, CO · Accident · No injuries · Limited investigation · Final report · Sep 4, 1983 · N7590 · Substantial damage
  > After releasing from an aerial tow about 2,000 ft AGL, the plt was unable to find lifting thermals. The glider began to descend about 800 fpm so the plt maneuvered to return to the airstrip. The glider collided with several small trees short of the rwy.
- [NTSB DEN82DA064](https://openairdocs.org/ntsb/DEN82DA064.md): Schweizer SGS-2-33A · Colorado Spring, CO · Accident · No injuries · Final report · Apr 17, 1982 · N2045T · Substantial damage
  > The student pilot reported that he came over the airport at about 1200 ft AGL to enter a downwind for landing. He stated that he encountered a moderate to strong sink and strong southerly winds. He estimated that the wind velocity was 45 to 50 mph at 1000 ft…
- [NTSB DEN79DTE85](https://openairdocs.org/ntsb/DEN79DTE85.md): Schweizer SGS233 · Colorado Spgs, CO · Accident · Serious injuries · Closed · Sep 26, 1979 · N65840 · Substantial damage
- [NTSB DEN78FTE92](https://openairdocs.org/ntsb/DEN78FTE92.md): Schweizer 2-33A · Boulder, CO · Accident · No injuries · Closed · Aug 26, 1978 · N2624H · Substantial damage
- [NTSB DEN77FTE42](https://openairdocs.org/ntsb/DEN77FTE42.md): Schwiezer SGS233 · Boulder, CO · Accident · No injuries · Closed · May 13, 1977 · N65829 · Substantial damage
- [NTSB DEN77DTE38](https://openairdocs.org/ntsb/DEN77DTE38.md): Schweizer 2-33A · Wellington, CO · Accident · Serious injuries · Closed · May 4, 1977 · N2624H · Substantial damage

## 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" = 'CO' AND c."eventCountry" = 'USA'
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('8051606'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=8051606&state=CO

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