# N65879: 1974 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: 352
- Year built: 1974
- Type: Glider
- Engine type: None
- Airworthiness: Standard, glider
- Airworthiness date: August 2, 1974
- Certificate issued: April 15, 2014
- Expires: April 30, 2027
- Mode S code: A8ADE1
- Registered owner: [Oklahoma Soaring Association](https://openairdocs.org/faa-owner/OKLAHOMA%20SOARING%20ASSOCIATION)
- Location: [Mustang, OK](https://openairdocs.org/faa-place/OK/Mustang)
- Owner type: Corporation
- Owner's area on the map: 35.3713° N, 97.7530° W: Placed by OpenAirDocs at the center of ZIP code 73064, within about 4 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=65879
- Page: https://openairdocs.org/aircraft/N65879

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 (2)

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 FTW90DPJ09](https://openairdocs.org/ntsb/FTW90DPJ09), Jul 8, 1990: Schweizer SGS 2-33A (N65879), Norman, OK, substantial damage. Probable cause: THE PILOT'S MISJUDGEMENT OF PROPER GLIDEPATH.
- [NTSB CHI77DEM31](https://openairdocs.org/ntsb/CHI77DEM31), Jul 3, 1977: Schweizer SGS2-3 (N65879), Cedar, MI, substantial damage

## 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 19900708024489A](https://openairdocs.org/incident/19900708024489A), Jul 8, 1990: Scwzer SGS233A (N65879), Norman, OK, Substantial damage. Crashed into trees on final for landing. Misjudged gliding distance with gusty crosswind.
- [Accident 19770703017919A](https://openairdocs.org/incident/19770703017919A), Jul 3, 1977: Scwzer SGS233A (N65879), Cedar, MI, Substantial damage

## 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

## 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

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