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

SA00957SE

Installation of Salmson Model AD9 engine in accordance with Paul T. Cullman Installation Instructions No. 1, dated July 19, 2001. Approved for serial number 1206 ONLY. Held by Cullman Paul T.. Last revised August 20, 2001. System: engine.

What it applies to

Kind of product
Aircraft
Design holder
Curtiss-Wright Corporation
Models
Jr. CW-1
Type certificate
ATC 397
On this site
Curtiss Wright JR CW1 20 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 8, 2026.