Alexander Schleicher ASK 21
38 on the U.S. register across 3 versions the FAA records separately. Built from 1982 to 2022; half of them date from 2014 or earlier. California has the most (7). 84% are registered to companies, flight schools, clubs and other organisations; the rest to individuals, who are not named here at this time.
About the ASK 21 from the FAA's model table
- Type
- Glider · Gliders
- Power
- None
- Common engines
- None None (21), Ama/Expr Unknown Eng (4), Austro Iae 50R-Aa (3)
- Seats
- 2
- Built of
- composite · A glass- and carbon-fibre glider.
- Maker on the register
- Alexander Schleicher
- Registered
- earliest certificate May 2, 2007; newest December 4, 2025
Where they are owner's state
Who owns them registrant type
By owner type, as a table
| aircraft | share | |
|---|---|---|
| Corporation | 30 | 79% |
| Individual | 4 | 11% |
| LLC | 2 | 5% |
| Co-owned | 2 | 5% |
Versions as the FAA records them · click one to list only those aircraft
When they were built by decade · 9 with no year on file
Airworthiness certificate class
By airworthiness certificate, as a table
| aircraft | share | |
|---|---|---|
| Standard | 29 | 76% |
| None on file | 9 | 24% |
Biggest operators companies, schools and clubs
Southern California Soaring Academy INC3Texas Soaring Association INC2Soaring Club of Houston INC2Greater Boston Soaring Club INC2Windy City Soaring Association1Tuscon Soaring Club INC1Tidewater Soaring Society1St Louis Soaring Association INC1Soaring Society of Dayton INC1Soaring Society of Boulder1Skytow de LLC1Skyline Soaring Club INC1
Largest fleets, as a table
| aircraft | |
|---|---|
| Southern California Soaring Academy INC | 3 |
| Texas Soaring Association INC | 2 |
| Soaring Club of Houston INC | 2 |
| Greater Boston Soaring Club INC | 2 |
| Windy City Soaring Association | 1 |
| Tuscon Soaring Club INC | 1 |
| Tidewater Soaring Society | 1 |
| St Louis Soaring Association INC | 1 |
| Soaring Society of Dayton INC | 1 |
| Soaring Society of Boulder | 1 |
| Skytow de LLC | 1 |
| Skyline Soaring Club INC | 1 |
Fleet pages: Southern California Soaring Academy INC · Texas Soaring Association INC · Soaring Club of Houston INC · Windy City Soaring Association · Tidewater Soaring Society · St Louis Soaring Association INC · Soaring Society of Dayton INC · Skyline Soaring Club INC
Accident history NTSB records · 0 cases since 1982, 0 fatal
No NTSB accident or incident records match this family's versions. Each aircraft's own page also shows its record. How models compare: Accidents by model in Aviation Analytics.
Questions people ask answers refresh every morning
How many Alexander Schleicher ASK 21 aircraft are registered in the U.S.?
38 as of October 30, 2026, counting 3 versions the FAA records separately.
Which state has the most Alexander Schleicher ASK 21s?
California, with 7.
Who owns the Alexander Schleicher ASK 21?
84% are registered to companies, flight schools, clubs and other organisations; the rest to individuals and co-owners, who are not named on this site at this time.
When were the Alexander Schleicher ASK 21s on the register built?
Between 1982 and 2022; half of them in 2014 or earlier.
What is the Alexander Schleicher ASK 21 made of?
The airframe is composite: carbon fibre or glass fibre set in resin, moulded in large pieces with few joints, which gives smooth shapes but needs different inspection and repair methods from metal. A glass- and carbon-fibre glider. The FAA's type certificate data sheet is the authority for any one model.
What the FAA has certified, ordered and been told about the Alexander Schleicher ASK 21 the component layer
The airframe is composite: carbon fibre or glass fibre set in resin, moulded in large pieces with few joints, which gives smooth shapes but needs different inspection and repair methods from metal. A glass- and carbon-fibre glider. The design is held under 1 type certificate (G47EU, held by Alexander Schleicher GMBH & CO. Segelflugzeugbau). The FAA has issued 13 airworthiness directives (orders that owners must comply with) that name this model, most of them about other and general.
FAA orders 13 airworthiness directives · newest first
2017-03-172017-02-11 · Flight Controls · flight controls
2014-05-082014-06-07 · Placards and Markings · other and general
1999-07-2595-11-15 R1 · Parallel Rocker · flight controls
1998-07-1498-12-03 · Rudder Panel, Airbrake Bellcrank, Rear Canopy Hinge · flight controls
1998-06-2698-10-07 · SFM - Weight and Balance · other and general
1998-06-1498-09-13 · S-Shaped Rudder Pedal Tube Inspection · flight controls
All orders naming the Alexander Schleicher ASK 21
By system
Orders by system, as a table
| orders | share | |
|---|---|---|
| Other and general | 6 | 46% |
| Flight controls | 6 | 46% |
| Landing gear | 1 | 8% |
Certificates and bulletins
G47EUType certificate held by Alexander Schleicher GMBH & CO. Segelflugzeugbau · 3 models listed · revised June 12, 2023
Safety bulletins 1 · advice, not orders
1997-11-12ACE-98-07 ·
Sources: the FAA's type certificate data sheets, airworthiness directives, supplemental type certificates, special conditions and special airworthiness information bulletins (Dynamic Regulatory System), and the FAA's service difficulty reports. A failure report is what an operator or repair station chose to file; the counts show reporting as much as reliability, and larger and commercial fleets report more. How the systems are grouped.
Connections how the ASK 21 links to the rest of the register
Design
- Alexander Schleicher 163 aircraft on the register
- Alexander Schleicher ASK 21 26 registered
- Alexander Schleicher ASK 21 B 7 registered
- Alexander Schleicher ASK 21 MI 5 registered
- Type certificate G47EU · held by Alexander Schleicher GMBH & CO
- Built of composite · A glass- and carbon-fibre glider.
Engines
- Austro Engine IAE 50R-AA 3 of these aircraft · 56 hp
- International Aero Engines 50R-AA 1 of these aircraft · 56 hp
- Austro Engine AE330 1 of these aircraft · 171 hp
Where they are
- California 7 of these aircraft
- Virginia 6 of these aircraft
- Texas 5 of these aircraft
- Illinois 3 of these aircraft
- Delaware 3 of these aircraft
Biggest operators
- Southern California Soaring Academy INC 3 of these aircraft
- Texas Soaring Association INC 2 of these aircraft
- Soaring Club Of Houston INC 2 of these aircraft
- Greater Boston Soaring Club INC 2 of these aircraft
- Windy City Soaring Association 1 of these aircraft
Record
- NTSB accidents and incidents involving the ASK 21 0 cases since 1982 · 0 fatal
- FAA filings this year on these aircraft 6 filings · 6 bill of sale
Airworthiness
- FAA orders naming the ASK 21 13 airworthiness directives
The whole map of how records connect · these connections as data: /graph/model/alexander-schleicher/ask-21.json.
Aircraft newest certificates first · 38
| Tail no. | Maker and model | Owner and base | Certificate | Registered | Status |
|---|---|---|---|---|---|
| N648BS | Alexander Schleicher ASK 21 MI |
Co-owned owner Virginia |
Standard | 2025-12-04 | ValidFAA registration status code V: Valid registration. All codes |
| N243DN | Alexander Schleicher ASK 21 B |
Soaring Society of Dayton INC Waynesville, Ohio |
None on file | 2025-06-05 | ValidFAA registration status code V: Valid registration. All codes |
| N218RC | Alexander Schleicher ASK 21 MI |
Overwatch Tools INC Chesapeake, Virginia |
None on file | 2025-05-09 | ValidFAA registration status code V: Valid registration. All codes |
| N721RC | Alexander Schleicher ASK 21 |
Greater Boston Soaring Club INC Sterling, Massachusetts |
Standard | 2024-07-02 | ValidFAA registration status code V: Valid registration. All codes |
| N214AS | Alexander Schleicher ASK 21 MI |
Co-owned owner Tennessee |
Standard | 2024-06-17 | ValidFAA registration status code V: Valid registration. All codes |
| N16TN | Alexander Schleicher ASK 21 MI |
Individual owner Texas |
Standard | 2024-02-14 | ValidFAA registration status code V: Valid registration. All codes |
| N484AJ | Alexander Schleicher ASK 21 |
Skytow de LLC Middletown, Delaware |
Standard | 2023-12-26 | ValidFAA registration status code V: Valid registration. All codes |
| N122MN | Alexander Schleicher ASK 21 B |
Minnesota Soaring Club INC Stanton, Minnesota |
Standard | 2023-02-01 | ValidFAA registration status code V: Valid registration. All codes |
| N215ES | Alexander Schleicher ASK 21 |
Eagle Sport Aviation Club De Leon Springs, Florida |
None on file | 2022-11-08 | ValidFAA registration status code V: Valid registration. All codes |
| N696CT | Alexander Schleicher ASK 21 B |
Saint Louis Soaring Association INC Saint Louis, Missouri |
Standard | 2022-07-08 | ValidFAA registration status code V: Valid registration. All codes |
| N67PJ | Alexander Schleicher ASK 21 |
Tuscon Soaring Club INC Sahuarita, Arizona |
Standard | 2022-03-02 | ValidFAA registration status code V: Valid registration. All codes |
| N214WS | Alexander Schleicher ASK 21 MI |
Individual owner California |
Standard | 2021-12-30 | ValidFAA registration status code V: Valid registration. All codes |
| N792SC | Alexander Schleicher ASK 21 |
Soaring Club of Houston INC Waller, Texas |
None on file | 2021-06-28 | ValidFAA registration status code V: Valid registration. All codes |
| N202GG | Alexander Schleicher ASK 21 |
Hollister Soaring Center LLC Hollister, California |
Standard | 2021-03-30 | ValidFAA registration status code V: Valid registration. All codes |
| N211MS | Alexander Schleicher ASK 21 B |
Friends Aviation Wilmington, Delaware |
Standard | 2020-07-01 | ValidFAA registration status code V: Valid registration. All codes |
| N211RM | Alexander Schleicher ASK 21 B |
Individual owner California |
Standard | 2019-09-26 | ValidFAA registration status code V: Valid registration. All codes |
| N211BM | Alexander Schleicher ASK 21 B |
Individual owner California |
Standard | 2019-07-31 | ValidFAA registration status code V: Valid registration. All codes |
| N521CG | Alexander Schleicher ASK 21 B |
Chicago Glider Club INC Minooka, Illinois |
Standard | 2019-07-31 | ValidFAA registration status code V: Valid registration. All codes |
| N3211W | Alexander Schleicher ASK 21 |
Tidewater Soaring Society Windsor, Virginia |
Standard | 2019-05-02 | ValidFAA registration status code V: Valid registration. All codes |
| N321K | Alexander Schleicher ASK 21 |
Skyline Soaring Club INC Front Royal, Virginia |
None on file | 2019-03-13 | ValidFAA registration status code V: Valid registration. All codes |
| N940PB | Alexander Schleicher ASK 21 |
St Louis Soaring Association INC Saint Louis, Missouri |
Standard | 2018-10-04 | ValidFAA registration status code V: Valid registration. All codes |
| N214BS | Alexander Schleicher ASK 21 |
Brandywine Soaring Association Hockessin, Delaware |
Standard | 2018-06-13 | ValidFAA registration status code V: Valid registration. All codes |
| N899MA | Alexander Schleicher ASK 21 |
Mid Atlantic Soaring Association Frederick, Maryland |
Standard | 2017-11-09 | ValidFAA registration status code V: Valid registration. All codes |
| N899SA | Alexander Schleicher ASK 21 |
Mid Atlantic Soaring Association (M-Asa) Frederick, Maryland |
Standard | 2017-11-09 | ValidFAA registration status code V: Valid registration. All codes |
| N421GB | Alexander Schleicher ASK 21 |
Greater Boston Soaring Club INC Sterling, Massachusetts |
Standard | 2016-08-12 | ValidFAA registration status code V: Valid registration. All codes |
| N221CW | Alexander Schleicher ASK 21 |
Central Indiana Soaring Society Yorktown, Indiana |
Standard | 2016-01-05 | ValidFAA registration status code V: Valid registration. All codes |
| N421EF | Alexander Schleicher ASK 21 |
Soaring Society of Boulder Boulder, Colorado |
Standard | 2014-10-23 | ValidFAA registration status code V: Valid registration. All codes |
| N621HH | Alexander Schleicher ASK 21 |
Harris Hill Soaring CORP Horseheads, New York |
Standard | 2014-09-17 | ValidFAA registration status code V: Valid registration. All codes |
| N50NC | Alexander Schleicher ASK 21 |
Blue Ridge Soaring Society New Castle, Virginia |
None on file | 2014-08-29 | ValidFAA registration status code V: Valid registration. All codes |
| N791SC | Alexander Schleicher ASK 21 |
Soaring Club of Houston INC Waller, Texas |
Standard | 2014-07-08 | ValidFAA registration status code V: Valid registration. All codes |
| N468SA | Alexander Schleicher ASK 21 |
Southern California Soaring Academy INC Valencia, California |
Standard | 2014-03-18 | ValidFAA registration status code V: Valid registration. All codes |
| N650SA | Alexander Schleicher ASK 21 |
Southern California Soaring Academy INC Valencia, California |
Standard | 2012-02-10 | ValidFAA registration status code V: Valid registration. All codes |
| N700SA | Alexander Schleicher ASK 21 |
Southern California Soaring Academy INC Valencia, California |
Standard | 2012-02-10 | ValidFAA registration status code V: Valid registration. All codes |
| N747SV | Alexander Schleicher ASK 21 |
Shenandoah Valley Soaring INC Nellysford, Virginia |
None on file | 2010-10-26 | ValidFAA registration status code V: Valid registration. All codes |
| N621CG | Alexander Schleicher ASK 21 |
Chicago Glider Club Minooka, Illinois |
Standard | 2009-11-13 | ValidFAA registration status code V: Valid registration. All codes |
| N721WC | Alexander Schleicher ASK 21 |
Windy City Soaring Association Hinckley, Illinois |
Standard | 2008-01-17 | ValidFAA registration status code V: Valid registration. All codes |
| N966TS | Alexander Schleicher ASK 21 |
Texas Soaring Association INC Midlothian, Texas |
None on file | 2007-05-02 | ValidFAA registration status code V: Valid registration. All codes |
| N977TS | Alexander Schleicher ASK 21 |
Texas Soaring Association INC Midlothian, Texas |
None on file | 2007-05-02 | ValidFAA registration status code V: Valid registration. All codes |