SA09506AC-D
Installation of S-TEC System 30 Two Axis Automatic Flight Guidance System, Model ST-886-30,. Held by S-Tec Corporation, which holds 1,083 approved modifications in all. Last revised March 15, 2001. System: other and general.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Beechcraft Corporation; Beechcraft Corporation
- Models
- D17S, SD17S
- Type certificates
- A-649, A-649
- On this site
- Beechcraft D17 127 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 22, 2026.