SA09195AC-D
Installation of S-TEC System 55 Two Axis Automatic flight guidance system, Model ST-658, with Optional Autotrim System. Held by S-Tec Corporation, which holds 1,083 approved modifications in all. Last revised May 23, 2001. System: other and general.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Commander Aircraft Company; Commander Aircraft Company; Commander Aircraft Company; Commander Aircraft Company; Commander Aircraft Company; Commander Aircraft Company
- Models
- 112TC, 112B, 112TCA, 114, 114A, 112
- Type certificates
- A12SO, A12SO, A12SO, A12SO, A12SO, A12SO
- On this site
- Commander Aircraft Co 114 103 registered
Rockwell International 112 207 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.