SA385AL
Installation of rudder centering device in lieu of ventral fin. *This approval includes PA20S models with Lycoming O-320, 150 hp engine installed per an appropriate STC. Held by M R Borer Aircraft Svc, which holds 19 approved modifications in all. Last revised July 21, 1970. System: engine.
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.
- Models
- PA-20S-"135", PA-20S-"115", PA-20S
- Type certificates
- 1A4, 1A4, 1A4
- On this site
- Piper PA-20 Pacer 323 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 8, 2026.