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

SA8520SW-D

Installation of Century Flight Systems Automatic Flight System Model AK1043 consisting of Century I Autopilot with Optional Omni Tracker. (A185F 28V). Held by Century Flight Systems INC, which holds 765 approved modifications in all. Last revised September 3, 1997. System: flight controls.

What it applies to

Kind of product
Aircraft
Design holder
The Cessna Aircraft Company
Models
A185F
Type certificate
3A24
On this site
Cessna A185 Skywagon 1,372 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 5, 2026.