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

SA384NW

Installation of a Ranger 6-440C-5 engine, Universal (Flottorp) 86RB61 propeller and associated systems. Held by Boyne, Charles D.. Last revised December 9, 1976. System: propeller.

What it applies to

Kind of product
Aircraft
Design holder
Fairchild Industries Inc.
Models
24K (Army UC-61E)
Type certificate
TC 667
On this site
Fairchild 24 242 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.