SA968SW
Mitchell automatic flight system AK279 consisting of Century III autopilot with optional automatic pitch trim, radio couplers, automatic aileron stabilizer. Held by Century Flight Systems INC, which holds 765 approved modifications in all. Last revised July 9, 1984. System: flight controls.
What it applies to
- Kind of product
- Aircraft
- Design holder
- The Cessna Aircraft Company; The Cessna Aircraft Company
- Models
- 421A, 421
- Type certificates
- A7CE, A7CE
- On this site
- Cessna 421 Golden Eagle 769 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.