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

SA3353SW

Installation of Mitchell automatic flight system AK841/FD consisting of Century 41/flight director autopilot. Held by Mitchell Industries, INC, which holds 31 approved modifications in all. Last revised January 29, 1980. System: flight controls.

What it applies to

Kind of product
Aircraft
Design holder
Raytheon Aircraft Company
Models
95-B55
Type certificate
3A16
On this site
Beechcraft 95 Travel Air and Baron 55 1,244 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 19, 2026.