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.
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.
