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

SA1472NM

Installation of a wire cutting kit on Pratt & Whitney R-985 and R-1340 powered agricultural airplanes. Held by Smith Gene L. Last revised February 3, 1983. System: electrical power.

What it applies to

Kind of product
Aircraft
Design holder
Air Tractor Inc.; Air Tractor Inc.; Allied Ag Cat Productions Inc.; Allied Ag Cat Productions Inc.; Boeing Airplane Company Wichita Division; Boeing Airplane Company Wichita Division; Boeing Airplane Company Wichita Division; Boeing Airplane Company Wichita Division; Boeing Airplane Company Wichita Division; Boeing Airplane Company Wichita Division; Boeing Airplane Company Wichita Division; Boeing Airplane Company Wichita Division; Boeing Airplane Company Wichita Division; Boeing Airplane Company Wichita Division; Boeing Airplane Company Wichita Division; Boeing Airplane Company Wichita Division
Models
AT-300, AT-301, G-164A, G-164B, 75 (Army PT-13), A75 (Army PT-13A; -13B; -13C), A75J1 (Army PT-18), A75L3, A75L300, A75N1 (Army PT-17; -17A; Navy N2S-1; -4), B75 (Navy N2S-5), B75N1 (Navy N2S-3), D75N1 (Army PT-27), E75 (Army PT-13D; Navy N2S-5; PT-13D/N2S-5), E75N1 (Army PT-13D; Navy N2S-5; PT-13D/N2S-5), IB75A
Type certificates
A9SW, A9SW, 1A16, 1A16, A-743, A-743, A-743, A-743, A-743, A-743, A-743, A-743, A-743, A-743, A-743, A-743
On this site
Ag-Cat Corporation G-164 5 registered
Air Tractor Inc AT-301 84 registered
Boeing 75 18 registered
Boeing A75 Stearman Kaydet 979 registered
Boeing B75 Stearman Kaydet 257 registered
Boeing D75 35 registered
Boeing E75 Stearman Kaydet 343 registered
Boeing IB75 12 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 21, 2026.