SA09430AC-D
Installation of S-TEC System 550 Flight Director/Autopilot with trim, yaw damper, and altitude selector alerter, Model ST-845. Held by S-Tec Corporation, which holds 1,083 approved modifications in all. Last revised September 27, 2000. System: flight controls.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Piper Aircraft Inc.
- Models
- PA-46-500TP
- Type certificate
- A25SO
- On this site
- Piper PA-46 Malibu, Mirage, Matrix and M-Class 1,693 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.