# N17917: 1973 Schweizer SGS 1-26E - Status: Valid registration - Airframe: [Schweizer SGS 1-26E](https://openairdocs.org/model/schweizer-sgs-1-26e) (registry code 8050124, 1 seats) - Engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999) - Data sheets: [TCDS 1G10](https://openairdocs.org/tcds/1G10) (K & L Soaring LLC) (OpenAirDocs) - Serial number: 557 - Year built: 1973 - Type: Glider - Engine type: None - Airworthiness: Standard, glider - Airworthiness date: June 6, 1973 - Certificate issued: December 13, 1984 - Expires: January 31, 2029 - Mode S code: A13D37 - Registered owner: [Long Island Soaring Assn](https://openairdocs.org/faa-owner/LONG%20ISLAND%20SOARING%20ASSN) - Location: [Yaphank, NY](https://openairdocs.org/faa-place/NY/Yaphank) - Owner type: Corporation - Owner's area on the map: 40.8317° N, 72.9248° W: Placed by OpenAirDocs at the center of ZIP code 11980, within about 2 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based - FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=17917 - Page: https://openairdocs.org/aircraft/N17917 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 1-26E) - [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 (Amateur-built UNKNOWN ENG) 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 FTW79DRD46](https://openairdocs.org/ntsb/FTW79DRD46), Jul 1, 1979: Schweizer SGS126 (N17917), Robert, LA, substantial damage ## 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 19790701015679A](https://openairdocs.org/incident/19790701015679A), Jul 1, 1979: Scwzer SGS126E (N17917), Robert, LA, Substantial damage. Student glider pilot became too low in airport traffic pattern. Chose unsuitable landing area. ## 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. ## Service difficulty reports on N17917 not matched to an aircraft (1) They name N17917, but no registry record covers the date, the aircraft registered then was built later, or the report describes another aircraft. - [SDR UIA9311](https://openairdocs.org/sdr/UIA9311), Mar 30, 2004: SPAR. CORRODED. DURING C 05 CHECK OF DATUM A/C: FOUND CORROSION ON UPPER SURFACE OF FRONT SPAR OF RT WING AT STA XRS 531. FOUND CORROSION ON UPPER SURFACES OF LOWER SKIN P/N:59 ## STCs that may be installed (OpenAirDocs) (4) 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 1-26E) - [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 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 SG4WE](https://openairdocs.org/stc/SG4WE): Ceconite 101 covering of complete aircraft. Cooper Engineering Corporation. Lists SGS 1-26 Series ## Earlier aircraft with N17917 The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N17917 before. - [Cancelled 1943-05-07](https://openairdocs.org/deregistered/N17917-1943-05-07): Piper J-2, S/N 1517. Owner: [Eplee Ralph Ballenger](https://openairdocs.org/faa-owner/EPLEE%20RALPH%20BALLENGER) ## Related - Other Schweizer SGS 1-26E aircraft: https://openairdocs.org/model/schweizer-sgs-1-26e/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.