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Type certificate 1G1

Held today by K & L Soaring LLC, earlier by Schweizer Aircraft Corporation, Bohica, AG Cat\Schweizer Aircraft Corporation. It covers 6 models; about 581 aircraft on the U.S. register are built to it. Last revised November 29, 2010 (revision 10). 3 FAA orders name its designs.

Models under this certificate 6

SGS 1-23D, SGS 1-23F, SGS 1-23G, SGS 1-23H, SGS 1-23H-15, SGS 1-23

On this site

The data sheet on the FAA's site: the approved engines and propellers, weights, speeds and limits for each model.

FAA orders on these designs 3 · newest first

1988-08-1987-17-01 · Tow Release Installation · other and general
1987-01-2187-02-01 · Tow-Release Installation Inspection · other and general
1971-08-2671-17-09 · Loose Rudder Fittings · flight controls

Source: FAA type certificate data sheets (Dynamic Regulatory System); register counts from the FAA register of October 7, 2026. Connections as data: /graph/certificate/1G1.json.