SA4724NM
Installation of Cleveland brakes. Held by Machen INC, which holds 43 approved modifications in all. Last revised April 20, 1999. System: landing gear.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Aerostar Aircraft Corporation; Aerostar Aircraft Corporation; Aerostar Aircraft Corporation; Aerostar Aircraft Corporation; Aerostar Aircraft Corporation; Arctic Aircraft Company Inc.; Arctic Aircraft Company Inc.; Arctic Aircraft Company Inc.; Arctic Aircraft Company Inc.; Arctic Aircraft Company Inc.; Arctic Aircraft Company Inc.; Arctic Aircraft Company Inc.
- Models
- PA-60-601P (Aerostar 601P), PA-60-700P (Aerostar 700P), PA-60-601 (Aerostar 601), PA-60-600 (Aerostar 600), PA-60-602P (Aerostar 602P), S-1A-65F, S-1A, S-1A-90F, S-1A-85F, S-1B2, S-1B1 (Army XL-6), S-1B1 (Army L-6)
- Type certificates
- A17WE, A17WE, A17WE, A17WE, A17WE, A-737, A-737, A-737, A-737, A-754, A-754, A-754
- On this site
- Arctic Aircraft Co Inc S-1 15 registered
Interstate S-1 104 registered
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.