# Schweizer SGS 1-23D

- Type: Aircraft model (FAA registry)
- Registry code: 8050104
- Manufacturer (registry): SCHWEIZER
- Model: SGS 1-23D
- Aircraft type: Glider
- Category: Glider
- Engines: None
- Seats: 1
- Weight class: Up to 12,499 lb
- Cruise speed: 58 mph
- Certification: Type certificated
- Data sheet: [TCDS 1G1](https://openairdocs.org/tcds/1G1) (OpenAirDocs)
- Holder: K & L Soaring LLC
- Registered aircraft: 5
- Page: https://openairdocs.org/model/schweizer-sgs-1-23d

Model codes come from the FAA registry's reference file. ADs are matched to them by model name and maker.

## ADs that may apply (OpenAirDocs)

Matched to this model by model name and maker. Each AD's applicability may narrow it by serial number, part number or equipment.

- [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

## Registered aircraft (5)

- [N27P](https://openairdocs.org/aircraft/N27P): [Fenske Joseph G](https://openairdocs.org/faa-owner/FENSKE%20JOSEPH%20G), [Boonton, NJ](https://openairdocs.org/faa-place/NJ/Boonton), built 1956, S/N 31
- [N91829](https://openairdocs.org/aircraft/N91829): [Harrier Soaring Club Inc](https://openairdocs.org/faa-owner/HARRIER%20SOARING%20CLUB%20INC), [Raleigh, NC](https://openairdocs.org/faa-place/NC/Raleigh), built 1956, S/N 32
- [N91865](https://openairdocs.org/aircraft/N91865): [K & L Soaring LLC](https://openairdocs.org/faa-owner/K%20%26%20L%20SOARING%20LLC), [Cayuta, NY](https://openairdocs.org/faa-place/NY/Cayuta), S/N 33
- [N91887](https://openairdocs.org/aircraft/N91887): [Goodman Jonathan N](https://openairdocs.org/faa-owner/GOODMAN%20JONATHAN%20N), [Williamsburg, MA](https://openairdocs.org/faa-place/MA/Williamsburg), built 1953, S/N 27
- [N91896](https://openairdocs.org/aircraft/N91896): [Lowry Wilson R](https://openairdocs.org/faa-owner/LOWRY%20WILSON%20R), [Leonardtown, MD](https://openairdocs.org/faa-place/MD/Leonardtown), built 1955, S/N 28

## NTSB investigations (3)

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 ERA11CA087](https://openairdocs.org/ntsb/ERA11CA087), Dec 11, 2010: Schweizer SGS 1-23D (N91896), Aberdeen, MD, substantial damage. Probable cause: The pilot's loss of control during an intentional aerobatic maneuver (spin) resulting in a collision with trees.
- [NTSB NYC76FGT10](https://openairdocs.org/ntsb/NYC76FGT10), Nov 14, 1975: Schweizer 1-23D (N7840C), Wingate, PA, substantial damage
- [NTSB NYC71DHM15](https://openairdocs.org/ntsb/NYC71DHM15), Apr 25, 1970: Schweizer 1-23 (N91886), Wurtsboro, NY, substantial damage

## FAA accident and incident reports (3)

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.

- [Incident 20110529019319I](https://openairdocs.org/incident/20110529019319I), May 29, 2011: Schweizer SGS 1-23D (N91829), Lewisburg, NC, Minor damage. During the landing phase the student pilot stated that he may have left the dive breaks out (spoilers) too long which caused the glider to stall 10 feet above…
- [Accident 20101211052949A](https://openairdocs.org/incident/20101211052949A), Dec 11, 2010: Schweizer SGS 1-23D (N91896), Churchville, MD, Substantial damage. Pilot was practicing spins. Did not recover from spin and collided with trees. Aircraft received substantial damage. Pilot was not injured.
- [Accident 19751114037429A](https://openairdocs.org/incident/19751114037429A), Nov 14, 1975: Scwzer SGS123D (N7840C), Wingate, PA, Substantial damage. Snow obscrd plts vis drg lndg apch to open fld in a LCL snow squall.

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