# N2637H: 1976 Schweizer SGS 2-33A - Status: Valid registration - Airframe: [Schweizer SGS 2-33A](https://openairdocs.org/model/schweizer-sgs-2-33a) (registry code 8051606, 2 seats) - Engine: [NONE](https://openairdocs.org/engine/none) (registry code 00000) - Data sheets: [TCDS G2EA](https://openairdocs.org/tcds/G2EA) (K & L Soaring LLC) (OpenAirDocs) - Serial number: 447 - Year built: 1976 - Type: Glider - Engine type: None - Airworthiness: Standard, glider - Airworthiness date: June 3, 1976 - Certificate issued: August 20, 1987 - Expires: March 31, 2028 - Mode S code: A28D77 - Registered owner: [Kutztown Aviation Svc Inc](https://openairdocs.org/faa-owner/KUTZTOWN%20AVIATION%20SVC%20INC) - Location: [Germansville, PA](https://openairdocs.org/faa-place/PA/Germansville) - Owner type: Corporation - Owner's area on the map: 40.7192° N, 75.7041° W: Placed by OpenAirDocs at the center of ZIP code 18053, 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=2637H - Page: https://openairdocs.org/aircraft/N2637H 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): 4 in force ### Matched by airframe (Schweizer SGS 2-33A) - [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 76-13-11 R1](https://openairdocs.org/ad/76-13-11-R1): Aft Fuselage Longerons · K & L Soaring SGS 2-33, SGS 2-33A, SGU 2-22C and 3 more. Effective May 25, 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 - [AD 77-23-10](https://openairdocs.org/ad/77-23-10): Spar Web and Bolts · K & L Soaring SGS 2-33, SGS 2-33A and SGS 2-33AK. Effective Jun 21, 1978 ### 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 NYC90LA046](https://openairdocs.org/ntsb/NYC90LA046), Jan 8, 1990: Schweizer SGS 2-33A (N2637H), Kutztown, PA, substantial damage. Probable cause: IMPROPER DECISION OF THE GLIDER PILOT TO EXIT THE GLIDER WITHOUT POSITIVE ASSURANCE THAT THE TOW PILOT HAD RECEIVED HIS SIGNAL OR THAT THE GLIDER WAS RELEASED FROM THE TOW PLANE. A RELATED FACTOR TO… ## FAA accident and incident reports (2) 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 19900108020139A](https://openairdocs.org/incident/19900108020139A), Jan 8, 1990: Scwzer SGS232 (N2637H), Kutztown, PA, Substantial damage. Tow plane pilot did not see glider pilot cancel tow while he got out to check rudder. Glider towed with passenger. - [Incident 19800817067389I](https://openairdocs.org/incident/19800817067389I), Aug 17, 1980: Scwzer SGS233 (N2637H), Kutztown, PA, Minor damage. During start of tow glider, swerved and struck a parked plane. ## 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) (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 2-33A) - [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 SG1186GL](https://openairdocs.org/stc/SG1186GL): Surrendered and incorporated into STC SG01164CH. Cooper Aviation Supply Company, Inc - [STC SG305GL](https://openairdocs.org/stc/SG305GL): Install full swivel tail wheel, Cronig P/N SK-1, utilizing existing mounting points, bolts and hardware. Cronig Alvin ## Earlier aircraft with N2637H The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N2637H before. - [Cancelled 1965-05-21](https://openairdocs.org/deregistered/N2637H-1965-05-21): Ercoupe 415-C, S/N 3262, built 1946. Owner: [Moore Harry](https://openairdocs.org/faa-owner/MOORE%20HARRY), [Phoenix, AZ](https://openairdocs.org/faa-place/AZ/Phoenix) ## Related - Other Schweizer SGS 2-33A aircraft: https://openairdocs.org/model/schweizer-sgs-2-33a/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.