Models / Alexander Schleicher Gmbh & Co / ASK 21 / N721WC Aircraft record N721WC 1997 Alexander Schleicher Gmbh & Co ASK 21 Registration valid Unclaimed Source: FAA, updated Oct 20, 2026Safety record in brief: 1 NTSB accident (substantial damage, Sep 2020) · 2 ADs may apply
Registration Valid expires May 31, 2029 NTSB events 1 substantial, 2020 ADs may apply 2 confirm with A&P Service reports 0 since 1995
Registration FAA Aircraft Registry · Oct 20, 2026
Registered owner Windy City Soaring Association
Owner type Corporation
City, state Hinckley, IL
Certificate issued Jan 17, 2008
Expires May 31, 2029
Airworthiness Standard · Other
Airworthiness date Apr 22, 2008 We never show street addresses, even though they appear in the public FAA file. Individual owners are shown by city and state only.
Airframe & engine FAA Registry + type data Airframe
Manufacturer Alexander Schleicher Gmbh & Co
Model ASK 21
Year 1997
Serial number 21650
Aircraft type Glider
Category Land
Certification Not Type Certificated
Seats 2
Max takeoff weight Up to 12,499 lb
Mode S code A9A93A Engine
Make and model None None
Type None Total time and engine hours aren't public. They appear here once the owner adds logbooks.
Ownership history Ownership history from FAA records 2008 – now Windy City Soaring Association Hinckley, IL · current Individual owners are shown by city and state only.
Safety record NTSB · Oct 15, 2026 · FAA ADs · Oct 20, 2026 · SDRs · Oct 16, 2026 ADs published since 1998 that may apply (2) These match the airframe or engine model. Whether each one applies, and whether it's been complied with, depends on serial numbers, equipment and logbook entries. Applicability must be confirmed by a mechanic against the aircraft's records.
AD Subject Effective Applies to 2017-02-11 Flight Controls Mar 17, 2017 Airframe (ASK 21)Only with: Modified with a rudder hand control system using ASK 21 Technical Note No. 25 (February 16, 1993) or Technical Note No. 30 (January 22, 2007). 95-11-15 Alexander Schleicher GmbH & Co. Model ASK 21 Gliders Jul 14, 1995 Airframe (ASK 21)
AI-extracted — verify against original. Matched from each AD's applicability section; ADs replaced by a later AD are left out.
Service Difficulty Reports (0) No Service Difficulty Reports found for this airframe since 1995.
Sources FAA Aircraft Registry Registration, owner city and state, airframe, engine updated Oct 20, 2026 NTSB accident and incident database Accidents and incidents since 1982 updated Oct 15, 2026 FAA Airworthiness Directives (Federal Register) ADs published since 1998 updated Oct 20, 2026 FAA Service Difficulty Reports Reports since 1995 updated Oct 16, 2026 Request owner name removal Report an error in this record