# N899MA: 2017 Alexander Schleicher ASK 21 - Status: Valid registration - Airframe: [Alexander Schleicher ASK 21](https://openairdocs.org/model/alexander-schleicher-ask-21) (registry code 3801539, 2 seats) - Engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999) - Data sheets: [TCDS G47EU](https://openairdocs.org/tcds/G47EU) (Alexander Schleicher GmbH & Co. Segelflugzeugbau) (OpenAirDocs) - Serial number: 21945 - Year built: 2017 - Type: Glider - Engine type: None - Airworthiness: Standard, other - Airworthiness date: November 25, 2017 - Certificate issued: November 9, 2017 - Expires: November 30, 2027 - Mode S code: AC67D7 - Registered owner: [Mid Atlantic Soaring Association](https://openairdocs.org/faa-owner/MID%20ATLANTIC%20SOARING%20ASSOCIATION) - Location: [Frederick, MD](https://openairdocs.org/faa-place/MD/Frederick) - Owner type: Corporation - Owner's area on the map: 39.3549° N, 77.3759° W: Placed by OpenAirDocs at the center of ZIP code 21704, within about 3 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based - FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=899MA - Page: https://openairdocs.org/aircraft/N899MA From the FAA registry file of October 24, 2026. ADs below are matched by the registry's airframe and engine model codes. They may apply; each AD's applicability can narrow it by serial number, part number or installed equipment. This is not a compliance determination. ## ADs that may apply (OpenAirDocs): 13 in force ### Matched by airframe (Alexander Schleicher ASK 21) - [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 ### Matched by engine (Amateur-built UNKNOWN ENG) None in force. ## Information bulletins (advisory) None matched. ## NTSB investigations None matched to N899MA. ## NTSB investigations on N899MA not matched to an aircraft (1) 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 NYC7LDHA10](https://openairdocs.org/ntsb/NYC7LDHA10), Sep 7, 1975: Piper PA-32 (N899MA), Prospectville, PA, substantial damage ## FAA accident and incident reports None matched to N899MA. ## Reports on N899MA not matched to an aircraft (1) They name N899MA, but no registry record covers the date, the aircraft registered then was built later, or the report describes another aircraft. - [Incident 19790119002809I](https://openairdocs.org/incident/19790119002809I), Jan 19, 1979: Mtsbsi MU2B36A (N899MA), Atlanta, GA, Minor damage. After APU was disconnected and signal to taxi was received, APU was struck by the horizontal stabilizer ## Service difficulty reports None filed for this aircraft. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. ## STCs that may be installed (OpenAirDocs) None matched to this aircraft's models. ## Earlier aircraft with N899MA The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N899MA before. - [Cancelled 1999-09-23](https://openairdocs.org/deregistered/N899MA-1999-09-23): Cessna 208, S/N 20800087. Exported to Australia. Owner: [Maxfly Aviation Inc](https://openairdocs.org/faa-owner/MAXFLY%20AVIATION%20INC), [Fort Lauderdale, FL](https://openairdocs.org/faa-place/FL/Fort%20Lauderdale) - [Cancelled 1999-04-29](https://openairdocs.org/deregistered/N899MA-1999-04-29): Cessna 208, S/N 2080258. Exported to Canada. Owner: [Maxfly Aviation Inc](https://openairdocs.org/faa-owner/MAXFLY%20AVIATION%20INC), [Ft Lauderdale, FL](https://openairdocs.org/faa-place/FL/Ft%20Lauderdale) ## Related - Other Alexander Schleicher ASK 21 aircraft: https://openairdocs.org/model/alexander-schleicher-ask-21/aircraft.md - The Amateur-built UNKNOWN ENG engine: https://openairdocs.org/engine/amateur-built-unknown-eng.md --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.