SA3177SW-D
Installation of Mitchell Automatic Flight System Model AK470 consisting of a Century IIB Autopilot with Optional Radio Coupler. Held by Century Flight Systems INC, which holds 765 approved modifications in all. Last revised June 18, 1984. System: flight controls.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Textron Aviation Inc.; Textron Aviation Inc.; Textron Aviation Inc.; Textron Aviation Inc.
- Models
- TU206F, TU206G, U206F, U206G
- Type certificates
- A4CE, A4CE, A4CE, A4CE
- On this site
- Cessna TU206 344 registered
Cessna U206 Stationair 798 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.