Type Record · As of May 3, 2026
SCHLEICHER ASK-21
Glider · AMA/EXPR UNKNOWN ENG
Registered
43
Year Range
1982–2006
NTSB Events
10
Airworthiness Directives
22
01 / Distribution
Where the fleet lives and was built
Counts of currently-registered SCHLEICHER ASK-21 aircraft by US state and decade of manufacture, sourced from the FAA Aircraft Registry.
By State (top 10)
- CA 14.0% 6
- AL 11.6% 5
- NY 11.6% 5
- VA 7.0% 3
- GA 7.0% 3
- TN 4.7% 2
- IL 4.7% 2
- OR 4.7% 2
- OH 4.7% 2
- MN 4.7% 2
+11 more states
By Decade of Manufacture
- 1980s 39.5% 17
- 1990s 18.6% 8
- 2000s 20.9% 9
- Unknown 20.9% 9
02 / NTSB Records
Events involving SCHLEICHER ASK-21 aircraft
10 event(s) on file. Showing the most recent 10.
-
Oct 6, 2024
N341KSFront Royal, Virginia Minor
NTSB Docket → -
Sep 20, 2014
N421SLWurtsboro, New York Minor
NTSB Docket → -
Jul 7, 2008
N363KSElmira, New York
NTSB Docket → -
May 10, 2008
N361KSTehachapi, California
NTSB Docket → -
Jun 9, 2007
N621CPClear, Alaska
NTSB Docket → -
Jun 16, 2002
N341KSWoodstock, Virginia Minor
NTSB Docket → -
Aug 26, 2001
N121FLEagleville, Tennessee
NTSB Docket → -
Nov 6, 1988
N129KSVACAVILLE, California
NTSB Docket → -
Mar 7, 1987
N694KSPLAINFIELD, Illinois
NTSB Docket → -
Apr 20, 1970
N2237WMORGAN CITY, Louisiana
NTSB Docket →
03 / Airworthiness Directives
FAA directives applicable to SCHLEICHER ASK-21
22 directive(s) on file. Showing the most recent 22.
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Dec 14, 2017
Airworthiness Directives; Alexander Schleicher GmbH & Co. Segelflugzeugbau Gliders
We are adopting a new airworthiness directive (AD) for all Alexander Schleicher GmbH & Co. Segelflugzeugbau Models ASH 25M and ASH 26E gliders. This AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an…
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Sep 22, 2017
Airworthiness Directives; Alexander Schleicher GmbH & Co. Segelflugzeugbau Gliders
We propose to adopt a new airworthiness directive (AD) for all Alexander Schleicher GmbH & Co. Segelflugzeugbau Models ASH 25M and ASH 26E gliders. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsaf…
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Feb 10, 2017
Airworthiness Directives; Alexander Schleicher GmbH & Co. Gliders
We are adopting a new airworthiness directive (AD) for Alexander Schleicher GmbH & Co. Model ASK 21 gliders. This AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describ…
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Nov 10, 2016
Airworthiness Directives; Alexander Schleicher GmbH & Co. Gliders
We propose to adopt a new airworthiness directive (AD) for Alexander Schleicher GmbH & Co. Model ASK 21 gliders. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product.…
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Apr 3, 2014
Airworthiness Directives; Alexander Schleicher, Segelflugzeugbau Gliders
We are adopting a new airworthiness directive (AD) for all Alexander Schleicher, Segelflugzeugbau Model ASK 21 gliders. This AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The M…
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Jan 15, 2014
Airworthiness Directives; Alexander Schleicher, Segelflugzeugbau Gliders
We propose to adopt a new airworthiness directive (AD) for Alexander Schleicher, Segelflugzeugbau Model ASK 21 gliders. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation p…
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Jun 21, 1999
Airworthiness Directives; Alexander Schleicher Segelflugzeugbau Model ASK 21 Gliders
This action confirms the effective date of Airworthiness Directive (AD) 95-11-15 R1, which applies to Alexander Schleicher Segelflugzeugbau (Alexander Schleicher) Model ASK 21 gliders. AD 95-11- 15 R1 requires replacing the parallel rocker with a part of improved design and incorporating flight manual revisions, but o…
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Apr 26, 1999
Airworthiness Directives; Alexander Schleicher Segelflugzeugbau Model ASK 21 Gliders
This amendment revises Airworthiness Directive (AD) 95-11-15, which currently requires replacing the parallel rocker with a part of improved design and incorporating flight manual revisions on all Alexander Schleicher Segelflugzeugbau (Alexander Schleicher) Model ASK 21 gliders. AD 95-11-15 was the result of two incid…
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Jun 4, 1998
Airworthiness Directives; Alexander Schleicher Segelflugzeugbau Models ASW-19 and ASK 21 Sailplanes
This amendment adopts a new airworthiness directive (AD) that applies to certain Alexander Schleicher Segelflugzeugbau (Alexander Schleicher) Models ASW-19 and ASK 21 sailplanes. This AD requires: modifying the rudder surface panels; replacing the airbrake bellcrank; and modifying the rear canopy hinge structure. This…
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May 13, 1998
Airworthiness Directives; Alexander Schleicher Segelflugzeugbau Model ASK 21 Sailplanes
This amendment adopts a new airworthiness directive (AD) that applies to all Alexander Schleicher Segelflugzeugbau (Alexander Schleicher) Model ASK 21 sailplanes that have certain modifications installed. This AD requires changing the sailplane flight manual's weight and balance information. This AD is the result of m…
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Apr 28, 1998
Airworthiness Directives; Alexander Schleicher Segelflugzeugbau Model ASK 21 Sailplanes
This amendment adopts a new airworthiness directive (AD) that applies to certain Alexander Schleicher Segelflugzeugbau (Alexander Schleicher) Model ASK 21 sailplanes. This AD requires inspecting the S- shaped rudder pedal tube for displacement, and correcting any displacement of the plastic tube. This AD is the result…
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Apr 20, 1998
Airworthiness Directives; Alexander Schleicher Segelflugzeugbau Model ASK 21 Sailplanes
This amendment adopts a new airworthiness directive (AD) that applies to certain Alexander Schleicher Segelflugzeugbau (Alexander Schleicher) Model ASK 21 sailplanes. This AD requires removing certain pages from the sailplane flight manual and replacing these pages with new pages having different information regarding…
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Mar 20, 1998
Airworthiness Directives; Alexander Schleicher Segelflugzeugbau Model ASK-21 Sailplanes
This amendment adopts a new airworthiness directive (AD) that applies to certain Alexander Schleicher Segelflugzeugbau (Alexander Schleicher) Model ASK-21 sailplanes. This AD requires replacing any tow release cable assembly that does not have a swivel-type end with a cable assembly that does have a swivel-type end. T…
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Mar 20, 1998
Airworthiness Directives; Alexander Schleicher Segelflugzeugbau Model ASK-21 Sailplanes
This amendment adopts a new airworthiness directive (AD) that applies to Alexander Schleicher Segelflugzeugbau (Alexander Schleicher) Model ASK-21 sailplanes that do not have a certain automatic elevator connection installed. This AD requires drilling a drainage hole in the elevator pushrod, inspecting the elevator pu…
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Mar 17, 1998
Airworthiness Directives; Alexander Schleicher Segelflugzeugbau Models ASW-19 and ASK-21 Sailplanes
This document proposes to adopt a new airworthiness directive (AD) that would apply to certain Alexander Schleicher Segelflugzeugbau (Schleicher) Models ASW-19 and ASK-21 sailplanes. The proposed AD would require: modifying the rudder surface panels; replacing the airbrake bellcrank; and modifying the rear canopy hing…
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Feb 12, 1998
Airworthiness Directives; Alexander Schleicher Model ASK-21 Sailplanes
This document proposes to adopt a new airworthiness directive (AD) that would apply to Alexander Schleicher (Schleicher) Model ASK-21 sailplanes. The proposed action would require inspecting the S-shaped rudder pedal tube for displacement, and correcting any displacement of the plastic tube. The proposed AD is the res…
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Feb 12, 1998
Airworthiness Directives; Alexander Schleicher Model ASK-21 Sailplanes
This document proposes to adopt a new airworthiness directive (AD) that would apply to Alexander Schleicher Model ASK-21 sailplanes that have certain modifications installed. The proposed action would require changing the sailplane flight manual's weight and balance information. The proposed AD is the result of mandat…
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Feb 5, 1998
Airworthiness Directives; Alexander Schleicher Model ASK-21 Sailplanes
This document proposes to adopt a new airworthiness directive (AD) that would apply to Alexander Schleicher Model ASK-21 sailplanes. The proposed action would require removing certain pages from the sailplane flight manual and replacing these pages with new pages having different information regarding spin and stall r…
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Dec 19, 1997
Airworthiness Directives; Alexander Schleicher Segelflugzeugbau Model ASK-21 Sailplanes
This document proposes to adopt a new airworthiness directive (AD) that would apply to certain Alexander Schleicher Segelflugzeugbau (Alexander Schleicher) Model ASK-21 sailplanes that do not have a certain automatic elevator connection installed. The proposed AD would require drilling a drainage hole in the elevator…
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Dec 19, 1997
Airworthiness Directives; Alexander Schleicher Segelflugzeugbau Model ASK-21 Sailplanes
This document proposes to adopt a new airworthiness directive (AD) that would apply to certain Alexander Schleicher Segelflugzeugbau (Alexander Schleicher) Model ASK-21 sailplanes. The proposed AD would require replacing any tow release cable assembly that does not have a swivel-type end with a cable assembly that doe…
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Jun 7, 1995
Airworthiness Directives; Alexander Schleicher GmbH & Co. Model ASK 21 Gliders
This amendment adopts a new airworthiness directive (AD) that applies to Alexander Schleicher GmbH & Co. (Alexander Schleicher) Model ASK 21 gliders. The required action requires replacing the parallel rocker with a part of improved design, and incorporating flight manual revisions. Two incidents of the parallel rocke…
-
Jan 18, 1995
Airworthiness Directives; Alexander Schleicher GmbH & Co. Model ASK 21 Gliders
This document proposes to adopt a new airworthiness directive (AD) that would apply to Alexander Schleicher GmbH & Co. (Alexander Schleicher) Model ASK 21 gliders. The proposed action would require replacing the parallel rocker with a part of improved design, and incorporating flight manual revisions. Two incidents of…
04 / Regulations watching this type
Advisory Circulars and Federal Register activity for SCHLEICHER ASK-21
Advisory Circulars
No ACs explicitly mention this type. Showing universal operating-rule ACs that apply to all aircraft.
Recent Federal Register activity
Latest rulemakings touching general operating rules (Part 91) and maintenance rules (Part 43).
- 2026-04-17 Settlement Policy for Small Unmanned Aircraft System (UAS) Cases FR ↗
- 2026-02-10 Normalizing Unmanned Aircraft Systems Beyond Visual Line of Sight Operations; Reopening of Comment Period; Denial of Extension FR ↗
- 2026-02-02 25-Hour Cockpit Voice Recorder (CVR) Requirement, New Aircraft Production FR ↗
- 2026-01-28 Normalizing Unmanned Aircraft Systems Beyond Visual Line of Sight Operations; Reopening of Comment Period FR ↗
- 2026-01-07 Requirements for Interference-Tolerant Radio Altimeter Systems FR ↗
05 / Aircraft of this type
All 43 registered N-numbers
Every tail currently on the FAA registry for this make/model. Click an N-number to query the FAA Aircraft Inquiry; rows flagged ● have NTSB events on file. Tails seeded with full TallyAero pages link directly.
| N-number | St | Year | NTSB | FAA |
|---|---|---|---|---|
| N110BL | VA | 1985 | · | Look up ↗ |
| N120DW | AZ | 2002 | · | Look up ↗ |
| N121FL | TN | — | ● | Look up ↗ |
| N121WC | IL | 1990 | · | Look up ↗ |
| N121WT | CA | 1991 | · | Look up ↗ |
| N128KS | NM | — | · | Look up ↗ |
| N129KS | OR | — | ● | Look up ↗ |
| N179KS | CA | — | · | Look up ↗ |
| N21AF | MI | 1983 | · | Look up ↗ |
| N21HN | NJ | — | · | Look up ↗ |
| N21QU | UT | — | · | Look up ↗ |
| N221CC | OH | 2001 | · | Look up ↗ |
| N221CP | AL | 1998 | · | Look up ↗ |
| N221JH | OR | — | · | Look up ↗ |
| N221SB | SC | 1999 | · | Look up ↗ |
| N2237W | TN | 1982 | ● | Look up ↗ |
| N30BR | VA | 2005 | · | Look up ↗ |
| N314KS | CO | — | · | Look up ↗ |
| N315KS | IL | 1986 | · | Look up ↗ |
| N341KS | VA | 2002 | ● | Look up ↗ |
| N361KS | CA | 1984 | ● | Look up ↗ |
| N363KS | VT | 1984 | ● | Look up ↗ |
| N374KS | GA | 1983 | · | Look up ↗ |
| N421SL | CA | 2006 | ● | Look up ↗ |
| N474KS | NY | 1983 | · | Look up ↗ |
| N521CC | OH | 2005 | · | Look up ↗ |
| N521CP | AL | 1999 | · | Look up ↗ |
| N521HH | NY | 1999 | · | Look up ↗ |
| N521SL | NY | 2006 | · | Look up ↗ |
| N574KS | NY | 1984 | · | Look up ↗ |
| N594KS | WA | — | · | Look up ↗ |
| N612MG | GA | 1992 | · | Look up ↗ |
| N621CP | AL | 2000 | ● | Look up ↗ |
| N621MG | GA | 1985 | · | Look up ↗ |
| N674KS | MN | 1984 | · | Look up ↗ |
| N694KS | CA | 1984 | ● | Look up ↗ |
| N794KS | HI | 1984 | · | Look up ↗ |
| N804KL | CA | 1984 | · | Look up ↗ |
| N83MN | MN | 1983 | · | Look up ↗ |
| N91HH | NY | 1990 | · | Look up ↗ |
| N955TS | TX | 2006 | · | Look up ↗ |
| N972AF | AL | 1986 | · | Look up ↗ |
| N975AF | AL | 1984 | · | Look up ↗ |
Source — FAA Aircraft Registry · click "Look up" to query the live registry record (owner, address, last airworthiness)
05 / Sources & Methodology
Every count traces back to a primary US-government source
- FAA Aircraft Registry →
Refreshed Apr 27, 2026
Available
- NTSB CAROL →
Refreshed Apr 27, 2026
Available
- Federal Register (FAA Airworthiness Directives) →
Refreshed Apr 27, 2026
Available
We render counts and lists as the agency publishes them. Read the methodology →