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

SA292CH

Pratt & Whitney R-985-AN-1 (450 hp) engine conversion, including modification to the fuel, oil, electrical and braking systems. (A75L300 S/N 75-4456). Held by Batzer Ted. Last revised March 22, 1995. System: engine.

What it applies to

Kind of product
Aircraft
Design holder
Boeing Airplane Company Wichita Division
Models
A75L300
Type certificate
A-743
On this site
Boeing A75 Stearman Kaydet 979 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 20, 2026.