SA09413AC-D
Installation of S-TEC System 40X/50X Single and Two Axis Automatic Flight Guidance Systems, Model ST-777-40X/50X. Held by S-Tec Corporation, which holds 1,083 approved modifications in all. Last revised September 12, 2000. System: other and general.
What it applies to
- Kind of product
- Aircraft
- Design holder
- The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.
- Models
- PA-24-250, PA-24, PA-24-260, PA-24 Series, PA-24-400
- Type certificates
- 1A15, 1A15, 1A15, 1A15, 1A15
- On this site
- Piper PA-24 Comanche 2,428 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.