SA4403SW
Installation of S-TEC system 60 two axis flight guidance system Model ST-034 with optional autotrim system. Held by S-Tec Corporation, which holds 1,083 approved modifications in all. Last revised June 30, 1981. System: other and general.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Cessna Aircraft Company; Cessna Aircraft Company
- Models
- 210K, T210K
- Type certificates
- 3A21, 3A21
- On this site
- Cessna 210 Centurion 1,528 registered
Cessna T210 Turbo Centurion 1,283 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.