SA4009NM
Installation of the Merlyn Products induction air intercooler system on the Piper Aerostars equipped with Lycoming IO-540-AA1A5/-PIA5/-S1A5 engines. Held by Merlyn Products INC., which holds 35 approved modifications in all. Last revised August 16, 1989. System: engine.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Aerostar Aircraft Corporation; Aerostar Aircraft Corporation; Aerostar Aircraft Corporation; Aerostar Aircraft Corporation
- Models
- PA-60-600 (Aerostar 600), PA-60-601 (Aerostar 601), PA-60-601P (Aerostar 601P), PA-60-602P (Aerostar 602P)
- Type certificates
- A17WE, A17WE, A17WE, 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 23, 2026.