# Alexander Schleicher ASK 21

- Type: Aircraft model (FAA registry)
- Registry code: 3801539
- Manufacturer (registry): ALEXANDER SCHLEICHER GMBH & CO
- Model: ASK 21
- Aircraft type: Glider
- Category: Glider
- Engines: None
- Seats: 2
- Weight class: Up to 12,499 lb
- Certification: Not type certificated
- Data sheet: [TCDS G47EU](https://openairdocs.org/tcds/G47EU) (OpenAirDocs)
- Holder: Alexander Schleicher GmbH & Co. Segelflugzeugbau
- Registered aircraft: 26
- Page: https://openairdocs.org/model/alexander-schleicher-ask-21

Model codes come from the FAA registry's reference file. ADs are matched to them by model name and maker.

## ADs that may apply (OpenAirDocs)

Matched to this model by model name and maker. Each AD's applicability may narrow it by serial number, part number or equipment.

- [AD 2017-02-11](https://openairdocs.org/ad/2017-02-11): Flight Controls · Alexander Schleicher ASK 21. Effective Mar 17, 2017
- [AD 2014-06-07](https://openairdocs.org/ad/2014-06-07): Placards and Markings · Alexander Schleicher ASK 21. Effective May 8, 2014
- [AD 95-11-15 R1](https://openairdocs.org/ad/95-11-15-R1): Parallel Rocker · Alexander Schleicher ASK 21. Effective Jul 25, 1999
- [AD 98-12-03](https://openairdocs.org/ad/98-12-03): Rudder Panel, Airbrake Bellcrank, Rear Canopy Hinge · Alexander Schleicher ASK 21, ASW-19 and ASW-19B. Effective Jul 14, 1998
- [AD 98-10-07](https://openairdocs.org/ad/98-10-07): SFM - Weight and Balance · Alexander Schleicher ASK 21. Effective Jun 26, 1998
- [AD 98-09-13](https://openairdocs.org/ad/98-09-13): S-Shaped Rudder Pedal Tube Inspection · Alexander Schleicher ASK 21. Effective Jun 14, 1998
- [AD 98-08-29](https://openairdocs.org/ad/98-08-29): SFM - Stall and Spin Recovery Information · Alexander Schleicher ASK 21. Effective May 18, 1998
- [AD 98-06-38](https://openairdocs.org/ad/98-06-38): Elevator Pushrod · Alexander Schleicher ASK 21. Effective Apr 28, 1998
- [AD 98-06-37](https://openairdocs.org/ad/98-06-37): Tow Release Cable Assembly · Alexander Schleicher ASK 21. Effective Apr 28, 1998
- [AD 97-08-06 R1](https://openairdocs.org/ad/97-08-06-R1): Quick Connectors · Alexander Schleicher AS-K 13, AS 12, ASK 21 and 39 more. Effective Aug 1, 1997
- [AD 87-10-07](https://openairdocs.org/ad/87-10-07): Rudder Pedal · Alexander Schleicher ASK 21. Effective May 13, 1987
- [AD 85-06-07](https://openairdocs.org/ad/85-06-07): Main Wheel Box · Alexander Schleicher ASK 21. Effective Jul 25, 1985
- [AD 84-23-03](https://openairdocs.org/ad/84-23-03): Placard And Afm Changes · Alexander Schleicher ASK 21. Effective Nov 14, 1984

## Registered aircraft (26)

- [N202GG](https://openairdocs.org/aircraft/N202GG): [Hollister Soaring Center LLC](https://openairdocs.org/faa-owner/HOLLISTER%20SOARING%20CENTER%20LLC), [Hollister, CA](https://openairdocs.org/faa-place/CA/Hollister), built 2008, S/N 21832
- [N214BS](https://openairdocs.org/aircraft/N214BS): [Brandywine Soaring Association](https://openairdocs.org/faa-owner/BRANDYWINE%20SOARING%20ASSOCIATION), [Hockessin, DE](https://openairdocs.org/faa-place/DE/Hockessin), built 2018, S/N 21950
- [N215ES](https://openairdocs.org/aircraft/N215ES): [Eagle Sport Aviation Club](https://openairdocs.org/faa-owner/EAGLE%20SPORT%20AVIATION%20CLUB), [De Leon Springs, FL](https://openairdocs.org/faa-place/FL/De%20Leon%20Springs), S/N 21829
- [N221CW](https://openairdocs.org/aircraft/N221CW): [Central Indiana Soaring Society](https://openairdocs.org/faa-owner/CENTRAL%20INDIANA%20SOARING%20SOCIETY), [Yorktown, IN](https://openairdocs.org/faa-place/IN/Yorktown), built 2015, S/N 21931
- [N3211W](https://openairdocs.org/aircraft/N3211W): [Tidewater Soaring Society](https://openairdocs.org/faa-owner/TIDEWATER%20SOARING%20SOCIETY), [Windsor, VA](https://openairdocs.org/faa-place/VA/Windsor), built 2018, S/N 21951
- [N321K](https://openairdocs.org/aircraft/N321K): [Skyline Soaring Club Inc](https://openairdocs.org/faa-owner/SKYLINE%20SOARING%20CLUB%20INC), [Front Royal, VA](https://openairdocs.org/faa-place/VA/Front%20Royal), S/N 21875
- [N421EF](https://openairdocs.org/aircraft/N421EF): [Soaring Society Of Boulder](https://openairdocs.org/faa-owner/SOARING%20SOCIETY%20OF%20BOULDER), [Boulder, CO](https://openairdocs.org/faa-place/CO/Boulder), built 2013, S/N 21905
- [N421GB](https://openairdocs.org/aircraft/N421GB): [Greater Boston Soaring Club Inc](https://openairdocs.org/faa-owner/GREATER%20BOSTON%20SOARING%20CLUB%20INC), [Sterling, MA](https://openairdocs.org/faa-place/MA/Sterling), built 2016, S/N 21937
- [N468SA](https://openairdocs.org/aircraft/N468SA): [Southern California Soaring Academy Inc](https://openairdocs.org/faa-owner/SOUTHERN%20CALIFORNIA%20SOARING%20ACADEMY%20INC), [Valencia, CA](https://openairdocs.org/faa-place/CA/Valencia), built 2014, S/N 21908
- [N484AJ](https://openairdocs.org/aircraft/N484AJ): [Skytow De LLC](https://openairdocs.org/faa-owner/SKYTOW%20DE%20LLC), [Middletown, DE](https://openairdocs.org/faa-place/DE/Middletown), built 2012, S/N 21898
- [N50NC](https://openairdocs.org/aircraft/N50NC): [Blue Ridge Soaring Society](https://openairdocs.org/faa-owner/BLUE%20RIDGE%20SOARING%20SOCIETY), [New Castle, VA](https://openairdocs.org/faa-place/VA/New%20Castle), S/N 21901
- [N621CG](https://openairdocs.org/aircraft/N621CG): [Chicago Glider Club](https://openairdocs.org/faa-owner/CHICAGO%20GLIDER%20CLUB), [Minooka, IL](https://openairdocs.org/faa-place/IL/Minooka), built 2009, S/N 21861
- [N621HH](https://openairdocs.org/aircraft/N621HH): [Harris Hill Soaring Corp](https://openairdocs.org/faa-owner/HARRIS%20HILL%20SOARING%20CORP), [Horseheads, NY](https://openairdocs.org/faa-place/NY/Horseheads), built 2008, S/N 21846
- [N650SA](https://openairdocs.org/aircraft/N650SA): [Southern California Soaring Academy Inc](https://openairdocs.org/faa-owner/SOUTHERN%20CALIFORNIA%20SOARING%20ACADEMY%20INC), [Valencia, CA](https://openairdocs.org/faa-place/CA/Valencia), built 2011, S/N 21888
- [N67PJ](https://openairdocs.org/aircraft/N67PJ): [Tuscon Soaring Club Inc](https://openairdocs.org/faa-owner/TUSCON%20SOARING%20CLUB%20INC), [Sahuarita, AZ](https://openairdocs.org/faa-place/AZ/Sahuarita), built 2000, S/N 21707
- [N700SA](https://openairdocs.org/aircraft/N700SA): [Southern California Soaring Academy Inc](https://openairdocs.org/faa-owner/SOUTHERN%20CALIFORNIA%20SOARING%20ACADEMY%20INC), [Valencia, CA](https://openairdocs.org/faa-place/CA/Valencia), built 2011, S/N 21890
- [N721RC](https://openairdocs.org/aircraft/N721RC): [Greater Boston Soaring Club Inc](https://openairdocs.org/faa-owner/GREATER%20BOSTON%20SOARING%20CLUB%20INC), [Sterling, MA](https://openairdocs.org/faa-place/MA/Sterling), built 2015, S/N 21930
- [N721WC](https://openairdocs.org/aircraft/N721WC): [Windy City Soaring Association](https://openairdocs.org/faa-owner/WINDY%20CITY%20SOARING%20ASSOCIATION), [Hinckley, IL](https://openairdocs.org/faa-place/IL/Hinckley), built 1997, S/N 21650
- [N747SV](https://openairdocs.org/aircraft/N747SV): [Shenandoah Valley Soaring Inc](https://openairdocs.org/faa-owner/SHENANDOAH%20VALLEY%20SOARING%20INC), [Nellysford, VA](https://openairdocs.org/faa-place/VA/Nellysford), S/N 21879
- [N791SC](https://openairdocs.org/aircraft/N791SC): [Soaring Club Of Houston Inc](https://openairdocs.org/faa-owner/SOARING%20CLUB%20OF%20HOUSTON%20INC), [Waller, TX](https://openairdocs.org/faa-place/TX/Waller), built 1982, S/N 21126
- [N792SC](https://openairdocs.org/aircraft/N792SC): [Soaring Club Of Houston Inc](https://openairdocs.org/faa-owner/SOARING%20CLUB%20OF%20HOUSTON%20INC), [Waller, TX](https://openairdocs.org/faa-place/TX/Waller), S/N 21 044
- [N899MA](https://openairdocs.org/aircraft/N899MA): [Mid Atlantic Soaring Association](https://openairdocs.org/faa-owner/MID%20ATLANTIC%20SOARING%20ASSOCIATION), [Frederick, MD](https://openairdocs.org/faa-place/MD/Frederick), built 2017, S/N 21945
- [N899SA](https://openairdocs.org/aircraft/N899SA): [Mid Atlantic Soaring Association (M-Asa)](https://openairdocs.org/faa-owner/MID%20ATLANTIC%20SOARING%20ASSOCIATION%20(M-ASA)), [Frederick, MD](https://openairdocs.org/faa-place/MD/Frederick), built 2017, S/N 21946
- [N940PB](https://openairdocs.org/aircraft/N940PB): [St Louis Soaring Association Inc](https://openairdocs.org/faa-owner/ST%20LOUIS%20SOARING%20ASSOCIATION%20INC), [Saint Louis, MO](https://openairdocs.org/faa-place/MO/Saint%20Louis), built 2018, S/N 21955
- [N966TS](https://openairdocs.org/aircraft/N966TS): [Texas Soaring Association Inc](https://openairdocs.org/faa-owner/TEXAS%20SOARING%20ASSOCIATION%20INC), [Midlothian, TX](https://openairdocs.org/faa-place/TX/Midlothian), S/N 21820
- [N977TS](https://openairdocs.org/aircraft/N977TS): [Texas Soaring Association Inc](https://openairdocs.org/faa-owner/TEXAS%20SOARING%20ASSOCIATION%20INC), [Midlothian, TX](https://openairdocs.org/faa-place/TX/Midlothian), S/N 21821

## NTSB investigations (2)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB WPR22LA150](https://openairdocs.org/ntsb/WPR22LA150), Apr 8, 2022: Alexander Schleicher ASK 21 (N212NM), Valyermo, CA, substantial damage. Probable cause: The gliders encounter with atmospheric conditions where the lift was not sufficient to maintain flight and subsequent impact with mountainous terrain.
- [NTSB CEN20LA427](https://openairdocs.org/ntsb/CEN20LA427), Sep 29, 2020: Schleicher ASK21 (N721WC), Hinckley, IL, substantial damage. Probable cause: The pilot’s improper control input during a bounced landing that resulted in the glider impacting terrain.

## FAA accident and incident reports (3)

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [Accident 20220408005169A](https://openairdocs.org/incident/20220408005169A), Apr 8, 2022: Alexander Schleicher Gmbh & Co ASK 21 (N212NM), Llano, CA, Substantial damage. While flying south along an ascending ridgeline at 8000 MSL at a speed of 55 knots, the aircraft lost lift. The aircraft had sink of 6 knots. The pilot turned…
- [Accident 20200929017129A](https://openairdocs.org/incident/20200929017129A), Sep 29, 2020: Alexander Schleicher Gmbh & Co ASK 21 (N721WC), Hinckley, IL, Substantial damage. Took a pattern tow to 1800 MSL to practice approach and landing. Flared late and bounced on main gear. Rose up about 2 feet. Slight push forward on the stick…
- [Incident 20200129000849I](https://openairdocs.org/incident/20200129000849I), Jan 29, 2020: Alexander Schleicher Gmbh & Co ASK 21 (N202GG), Hollister, CA, Minor damage. -23 Hollister, CA (cvh): N202GG, ask 21 glider, cvh-cvh, crash landed on shoulder of san felipe road, approximately 100 yards West of runway 24.

## Service difficulty reports (2)

As reported by operators and repair stations, by the model named in the report.

- [SDR 2011FA0000187](https://openairdocs.org/sdr/2011FA0000187), Mar 21, 2011: INTERLOCK. GROOVED. CANOPY INTERLOCKS ARE FABRICATED FROM A NYLON OR DELRON SYNTHETIC MATERIAL THAT BECAME WORN IN AN UNSEEN LOCATION. THE WEAR IS FROM THE FORWARD CANOPY METAL LOC
- [SDR 2009FA0000235](https://openairdocs.org/sdr/2009FA0000235), Mar 1, 2009: SLIP JOINT. CORRODED. CORROSION WAS FOUND AT THE JUNCTION OF THE UPPER AND LOWER BODY OF THE FRONT SEAT CONTROL STICK ASSY. THE UPPER STICK HALF SLIDES INTO THE LOWER STICK HALF AND 

## PMA parts (OpenAirDocs) (2)

Current parts manufacturer approvals (PMA): parts the FAA has approved companies to make as replacements or modifications. Each record lists its models as free text; OpenAirDocs matched them to this model on its data sheet, so check the FAA record before relying on it. Newest first.

- [APS66-10600](https://drs.faa.gov/browse/excelExternalWindow/9D01F1C072009E8A8525703C006B15C2.0001): Brake Lining. Aviation Products Systems Inc · Replaces AP66-106, SB66-10600, ES-66-62-FM… · May 7, 2002
- [APS105-0200](https://drs.faa.gov/browse/excelExternalWindow/412BF79D411D4C418525703C006B1579.0001): Rivet. Aviation Products Systems Inc · Replaces AP105-2, SB105-0200, ES-105-2, 0105-0200 · May 7, 2002

## The same model under other registry codes

Amateur-built copies and renamed makers get their own codes.

- [Schleicher ASK-21](https://openairdocs.org/model/schleicher-ask-21): 43 registered aircraft, registry code 38015GY

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