SA5143SW-D
Installation of S-TEC System 60 pitch stabilization system, Model ST-035 with optional automatic electric trim system. Held by S-Tec Corporation, which holds 1,083 approved modifications in all. Last revised September 14, 1994. System: flight controls.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.
- Models
- PA-34-200, PA-34-200T, PA-34-220T
- Type certificates
- A7SO, A7SO, A7SO
- On this site
- Piper PA-34 Seneca 996 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.