# N623YB: Schweizer SGS 1-35

- Status: Valid registration
- Airframe: [Schweizer SGS 1-35](https://openairdocs.org/model/schweizer-sgs-1-35) (registry code 8050148, 1 seats)
- Data sheets: [TCDS G4EA](https://openairdocs.org/tcds/G4EA) (K & L Soaring LLC) (OpenAirDocs)
- Serial number: 38
- Type: Glider
- Engine type: None
- Certificate issued: November 12, 2015
- Expires: November 30, 2028
- Mode S code: A8238A
- Registered owner: [Sierra Soaring Club](https://openairdocs.org/faa-owner/SIERRA%20SOARING%20CLUB)
- Location: [Ridgecrest, CA](https://openairdocs.org/faa-place/CA/Ridgecrest)
- Owner type: Corporation
- Owner's area on the map: 35.5824° N, 117.6836° W: Placed by OpenAirDocs at the center of ZIP code 93555, within about 5 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=623YB
- Page: https://openairdocs.org/aircraft/N623YB

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): 1 in force

### Matched by airframe (Schweizer SGS 1-35)

- [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

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N623YB.

## FAA accident and incident reports

None matched to N623YB.

## 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) (2)

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 1-35)

- [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

## Related

- Other Schweizer SGS 1-35 aircraft: https://openairdocs.org/model/schweizer-sgs-1-35/aircraft.md

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