# NTSB investigations: Schleicher ASK-21

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 WPR26LA299](https://openairdocs.org/ntsb/WPR26LA299.md): Jonker Sailplanes JS3 · Tehachapi, CA · Accident · No injuries · Class 4 · Limited · Investigation open · Aug 8, 2026 · N9172T · 2 aircraft · Substantial damage
- [NTSB ERA25LA009](https://openairdocs.org/ntsb/ERA25LA009.md): Schleicher ASK-21 · Front Royal, VA · Accident · Minor injuries · Class 4 · Limited · Final report · Oct 6, 2024 · N341KS · Substantial damage
  > The pilot’s improper landing flare and subsequent improper recovery from a hard, bounced landing.
- [NTSB ERA14CA453](https://openairdocs.org/ntsb/ERA14CA453.md): Schleicher ASK 21 · Wurtsboro, NY · Accident · Minor injuries · Data collection · Final report · Sep 20, 2014 · N421SL · Substantial damage
  > A loss of lift during the landing approach, which resulted in impact with terrain.
- [NTSB WPR09CA479](https://openairdocs.org/ntsb/WPR09CA479.md): Schleicher ASK-21 · Jean, NV · Accident · Minor injuries · Data collection · Final report · Jun 30, 2009 · N63JJ · Substantial damage
  > The pilot's failure to maintain control of the glider during the initial climb due to an inadvertent encounter with wind.
- [NTSB MIA08CA136](https://openairdocs.org/ntsb/MIA08CA136.md): Schleicher ASK-21 · Elmira, NY · Accident · No injuries · Data collection · Final report · Jul 7, 2008 · N363KS · Substantial damage
  > The glider pilot's misjudged distance/altitude while soaring.
- [NTSB SEA08CA129](https://openairdocs.org/ntsb/SEA08CA129.md): Schleicher ASK-21 · Tehachapi, CA · Accident · No injuries · Data collection · Final report · May 10, 2008 · N361KS · Substantial damage
  > The pilot's inadequate preflight procedures and failure to check the spoiler control position, which resulted in the inadvertent deployment of the spoilers during takeoff. A contributing factor was the pilot's misinterpretation of the tow pilot's instructions.
- [NTSB ANC07LA046](https://openairdocs.org/ntsb/ANC07LA046.md): Schleicher ASK-21 · Clear, AK · Accident · No injuries · Limited investigation · Final report · Jun 9, 2007 · N621CP · Substantial damage
  > The dual student's misjudged distance/altitude during the final approach to land, and the flight instructor's inadequate supervision of the student, which resulted in an undershoot, and substantial damage.
- [NTSB ANC04FA016](https://openairdocs.org/ntsb/ANC04FA016.md): Piper J3C-65 · Peoria, AZ · Accident · 4 fatal · Field investigation · Final report · Dec 28, 2003 · N2094M · 2 aircraft · Destroyed
  > The inadequate visual lookout by the pilots of both aircraft, which resulted in their failure to see-and-avoid each other's aircraft and a subsequent midair collision. A factor associated with the accident was the airplane pilot's failure to determine that…
- [NTSB IAD02LA059](https://openairdocs.org/ntsb/IAD02LA059.md): Schleicher ASK21 · Woodstock, VA · Accident · Minor injuries · Limited investigation · Final report · Jun 16, 2002 · N341KS · Substantial damage
  > The pilot's failure to recognize the loss of orographic lift conditions. A factor was the loss of orographic lift.
- [NTSB ATL01LA098](https://openairdocs.org/ntsb/ATL01LA098.md): Schleicher ASK-21 · Eagleville, TN · Accident · No injuries · Limited investigation · Final report · Aug 26, 2001 · N121FL · Substantial damage
  > The loss of thermals during the glider flight that resulted in the collision with high vegetation while maneuvering for an emergency landing. A factor was high vegetation.
- [NTSB LAX89LA038](https://openairdocs.org/ntsb/LAX89LA038.md): Schleicher ASK-21 · Vacaville, CA · Accident · No injuries · Limited investigation · Final report · Nov 6, 1988 · N129KS · Substantial damage
  > During final approach, the glider collided with a fence. A witness stated that, 'the pilot simply let the glider get too low and too slow and hit a fence.' There were no mechanical problems reported prior to the accident. The pilot did not file an acdt report.
- [NTSB ATL87DLT01](https://openairdocs.org/ntsb/ATL87DLT01.md): Schleicher ASK-21 · Eagleville, TN · Accident · No injuries · Final report · Apr 17, 1987 · N174KS · Substantial damage
  > During a landing attempt, N174KS collided with a treeline on final approach to the airport. The instructor reported that the flight was normal until the student encountered a downdraft on final approach. The instructor took control of the controls, but was…
- [NTSB CHI87DEE06](https://openairdocs.org/ntsb/CHI87DEE06.md): Schleicher ASK-21 · Plainfield, IL · Accident · No injuries · Final report · Mar 7, 1987 · N694KS · Substantial damage
  > The glider plt rprtd that drg takeoff, the tow plt released the tow rope at aprx 15' AGL. Rprtdly, he released the tow rope due to a perceived lack of takeoff & climb performance. After being released, the glider plt made a right turn to avoid unacceptable…

## 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."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('38015GY'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=38015GY

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