The U.S. aircraft register, updated daily
Approved modifications · supplemental type certificate · current · reissued

SA1-373

Installation of Lycoming O-290-D(125 hp) or O-290-D2 (135 hp) engine; Sensenich M-74DM propeller; PA-18 engine baffles; Harrison#AP13SJ03-01 oil cooler. Held by Copper River Airmotive LLC, which holds 6 approved modifications in all. Last revised February 10, 2006. System: propeller.

What it applies to

Kind of product
Aircraft
Design holder
The New Piper Aircraft Inc.; The New Piper Aircraft Inc.
Models
PA-12S, PA-12
Type certificates
A-780, A-780
On this site
Piper PA-12 Super Cruiser 1,247 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.