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

SA4116SW

Installation of Lycoming LTP-101-600-A1A engine. Held by Page Industries, INC, which holds 4 approved modifications in all. Last revised April 29, 1980. System: engine.

What it applies to

Kind of product
Aircraft
Design holder
Allied Ag Cat Productions Inc.
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 7, 2026.