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

SA617NW

Installation of two Rajay Turbochargers on a Lycoming GO-580-G1D6 engine, Hartzell HC-83X20L/L8433-O propeller, cowl outlet screen (part no 1-TI-1-117), turbo inlet scoop (part no 1-TI-1-111 and -112) and associated systems. Held by S.T.C. Bee INC. Last revised June 9, 1978. System: propeller.

What it applies to

Kind of product
Aircraft
Design holder
Sky Enterprises Inc.
Models
RC-3
Type certificate
A-769
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 7, 2026.