SA979NW
Installation of a Lycoming engine, Hartzell propellers, Woodward propeller synchrophasers and unfeathering accumlators, modified pressuriztion system to 4.25 psi, Aero-Air Corporation air conditioning system, 35 ampere hour batteries, interior sound reduction package, aerodynamic performance package and associated systems (See STC for models). Held by Machen INC, which holds 43 approved modifications in all. Last revised April 10, 1981. System: propeller.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Aerostar Aircraft Corporation
- Models
- PA-60-601 (Aerostar 601)
- Type certificate
- A17WE
- On this site
- Piper PA-60 Aerostar 57 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.