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

SA434NW

Installation of EAC-12D40-AG-100S-4S prop on Pratt & Whitney R-1340-AN-1 engine. Held by Pacific Propeller International LLC, which holds 27 approved modifications in all. Last revised March 25, 2004. System: engine.

What it applies to

Kind of product
Aircraft
Design holder
Allied Ag Cat Productions Inc.; Allied Ag Cat Productions Inc.; Allied Ag Cat Productions Inc.
Models
G-164, G-164B, G-164C
Type certificates
1A16, 1A16, 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 7, 2026.