Grumman / Schweizer Ag-Cat Supplemental Type Certificates (STCs)

19 STCs approved for the Grumman / Schweizer Ag-Cat (G-164 Ag-Cat, Ag-Cat B, Ag-Cat C, Ag-Cat D, Super Ag-Cat (ag biplane)) family · FAA quick reference

Quick reference only — not a compliance record. This list is for research convenience and may be incomplete or out of date. It is not an airworthiness compliance determination. Always verify against the official FAA record, and check directly with the FAA before relying on it. ADs are mandatory; STCs indicate approval for the type (not installation on a specific airframe); SAIBs are advisory.

Supplemental Type Certificates (STCs) approved for the Grumman / Schweizer Ag-Cat type — FAA-approved modifications available for this aircraft family. Approval for the TYPE does not mean a given STC is installed on any individual airframe (that lives in the logbooks/337s).

Document	Title / Subject	Date
SA01757WI	To allow the use of UL91 or UL94 (minimum) grade aviation fuel — Swift Fuels LLC	2024-08-21
SA4503NM (PAGE 1)	Remove original cloth covering and install Ceconite covering — Ceconite Division of Poly-Fiber Inc.	2024-05-17
SA1008WE	Installation of Poly-Fiber covering material. — Poly-Fiber Inc	2022-09-09

+ 16 more STCs for the Grumman / Schweizer Ag-Cat family.

The complete, searchable Supplemental Type Certificates list — with in-app PDF viewing and a combined download — is part of AeroTell.

See all 19 STCs in the AeroTell app →