# N4450N: Schweizer SGS 1-26C - Status: Valid registration - Airframe: [Schweizer SGS 1-26C](https://openairdocs.org/model/schweizer-sgs-1-26c) (registry code 8050120, 1 seats) - Engine: [NONE](https://openairdocs.org/engine/none) (registry code 00000) - Data sheets: [TCDS 1G10](https://openairdocs.org/tcds/1G10) (K & L Soaring LLC) (OpenAirDocs) - Serial number: 365 - Type: Glider - Engine type: None - Airworthiness: Standard, glider - Airworthiness date: September 16, 1983 - Certificate issued: December 31, 2019 - Expires: December 31, 2029 - Mode S code: A55F95 - Registered owner: [Davidson Donna J](https://openairdocs.org/faa-owner/DAVIDSON%20DONNA%20J) - Location: [Aguila, AZ](https://openairdocs.org/faa-place/AZ/Aguila) - Owner type: Individual - Owner's area on the map: 33.8356° N, 113.2322° W: Placed by OpenAirDocs at the center of ZIP code 85320, within about 9 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based - FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=4450N - Page: https://openairdocs.org/aircraft/N4450N 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): 2 in force ### Matched by airframe (Schweizer SGS 1-26C) - [AD 87-17-01](https://openairdocs.org/ad/87-17-01): Tow Release Installation · K & L Soaring SGS 1-23, SGS 1-23D, SGS 1-23F and 25 more. Effective Aug 19, 1988 - [AD 87-02-01](https://openairdocs.org/ad/87-02-01): Tow-Release Installation Inspection · K & L Soaring SGM 2-37, SGS 1-23, SGS 1-23D and 32 more. Effective Jan 21, 1987 ### Matched by engine (NONE) None in force. ## Information bulletins (advisory) None matched. ## NTSB investigations (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 SEA84LA080](https://openairdocs.org/ntsb/SEA84LA080), Apr 8, 1984: Schweizer SGS1-26C (N4450N), Mount Vernon, WA, destroyed ## FAA accident and incident reports (1) 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 19840408028559A](https://openairdocs.org/incident/19840408028559A), Apr 8, 1984: Scwzer SGS126C (N4450N), Mount Vernon, WA, Destroyed. Lost lift. Overshot off airport landing in a field and ran into a ditch. Wires on approach end of field. ## 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) (8) Approved for this aircraft's airframe or engine model, in force first, then newest. The registry doesn't record which STCs an aircraft has; its records do. ### Approved for the airframe (Schweizer SGS 1-26C) - [STC SA01734SE](https://openairdocs.org/stc/SA01734SE): Application of Stewart Systems synthetic fabric covering system to aircraft fuselage, wings, tail surfaces, control surfaces and related parts. Andrew D. Humphrey - [STC SA1008WE](https://openairdocs.org/stc/SA1008WE): Installation of Poly-Fiber covering material. Poly-Fiber Inc - [STC SG01164CH](https://openairdocs.org/stc/SG01164CH): Install Cooper superflite 102 fabric. Aviation Products Systems Inc - [STC SG1265GL](https://openairdocs.org/stc/SG1265GL): Surrendered and incorporated into STC SG01164CH. Cooper Aviation Supply Company, Inc - [STC SA1351WE](https://openairdocs.org/stc/SA1351WE): Replace existing fabric on wings, fuselage, empennage, and/or control surfaces, with Ceconite101 material. (262A Series -12). Ceconite Inc - [STC SG10WE](https://openairdocs.org/stc/SG10WE): Replace existing fabric on wings, fuselage, empennage, and/or control surfaces with Ceconite103 material. Ceconite Inc - [STC SG4-1240](https://openairdocs.org/stc/SG4-1240): Installation of Eonnex cover on aircraft surfaces. Ceconite, Inc - [STC SG4WE](https://openairdocs.org/stc/SG4WE): Ceconite 101 covering of complete aircraft. Cooper Engineering Corporation. Lists SGS 1-26 Series ## Earlier aircraft with N4450N The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N4450N before. - [Cancelled 1956-02-03](https://openairdocs.org/deregistered/N4450N-1956-02-03): Stinson SR-10F, S/N F7-5918. Owner: [Taber Glenn E](https://openairdocs.org/faa-owner/TABER%20GLENN%20E), [Kansas City, MO](https://openairdocs.org/faa-place/MO/Kansas%20City) ## Related - Other Schweizer SGS 1-26C aircraft: https://openairdocs.org/model/schweizer-sgs-1-26c/aircraft.md - The NONE engine: https://openairdocs.org/engine/none.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.