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

SA8600SW

Installation of Sundstrand Model T-62T-40C9 auxiliary power units. Held by K C Aviation, INC, which holds 7 approved modifications in all. Last revised January 29, 1993. System: engine.

What it applies to

Kind of product
Aircraft
Design holder
Raytheon Aircraft Company
Models
HS.125 Series 700B
Type certificate
A3EU
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 19, 2026.