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

SA3132SW-D

Installation of Mitchell Automatic Flight System Model AK451 consisting of Century III Autopilot with Optional Command Automatic Electronic Pitch Trim, Radio Coupler and Glide Slope Coupler. Held by Mitchell Industries, INC., DBA Edo-Aire Mitchell. Last revised April 22, 1976. System: flight controls.

What it applies to

Kind of product
Aircraft
Design holder
Beechcraft Corporation; Beechcraft Corporation
Models
58, 58A
Type certificates
3A16, 3A16
On this site
Beechcraft 58 Baron 1,295 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.