The U.S. aircraft register, updated daily
Approved modifications · supplemental type certificate · current · reissued

SA884GL

Installation of Schweizer G164B A1202-80 vertical stabilizer. (G-164B THRU S/N 708B). Held by Sky-Tractor Supply CO, which holds 2 approved modifications in all. Last revised August 25, 1987. System: airframe structure.

What it applies to

Kind of product
Aircraft
Design holder
Ag Cat Corporation
Models
G-164B
Type certificate
1A16
On this site
Ag-Cat Corporation G-164 5 registered
The FAA's record
On the FAA's site

What an approved modification is

A supplemental type certificate is the FAA's approval of a change to a certified design: a new engine or propeller, avionics, an autopilot, floats, a parachute, a larger fuel tank, an ice-protection kit. The company holding it may sell the kit and the paperwork to owners of the listed models; the modification then becomes part of that aircraft's record. The FAA's list says what was approved and for which models, not how many aircraft carry it.

Source: FAA supplemental type certificates (Dynamic Regulatory System). Register counts from the FAA register of October 19, 2026.