SA4942NM
Install Lycoming IO-540-AA1A5 or IO-540-S1A5(AE) engine as modified by STC SE4941NM with Rotormaster 600846-01/-02 or600803-01/-02 turbochargers. Held by Merlyn Products INC., which holds 35 approved modifications in all. Last revised May 30, 1990. System: engine.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Aerostar Aircraft Corporation
- Models
- PA-60-601P (Aerostar 601P)
- 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.