SA3077SW-D
Mitchell automatic flight system AK553 consisting of Century I autopilot with optional omni tracker. Held by Century Flight Systems INC, which holds 765 approved modifications in all. Last revised June 21, 1984. System: flight controls.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Navion Aircraft Company Ltd.; Navion Aircraft Company Ltd.; Navion Aircraft Company Ltd.
- Models
- Navion (L-17A), Navion A (L-17B), Navion A (L-17C)
- Type certificates
- A-782, A-782, A-782
- 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 22, 2026.