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

ST491CH

Installation of an AlliedSignal CAS-66A Traffic Alert and Collision Avoidance System (TCAS I). Held by Electrosonics, which holds 76 approved modifications in all. Last revised July 21, 2000. System: instruments and avionics.

What it applies to

Kind of product
Aircraft
Design holder
Dassault-Aviation; Dassault-Aviation; Dassault-Aviation; Dassault-Aviation; Dassault-Aviation; Dassault-Aviation; Dassault-Aviation; Dassault-Aviation; Dassault-Aviation; Dassault-Aviation; Dassault-Aviation; Dassault-Aviation; Dassault-Aviation
Models
Mystere-Falcon 20-F5, Fan Jet Falcon Series G, Mystere-Falcon 200, Mystere-Falcon 20-C5, Mystere-Falcon 20-E5, Fan Jet Falcon Series D, Mystere-Falcon 20 Series, Mystere-Falcon 20-D5, Fan Jet Falcon Series C, Fan Jet Falcon, Fan Jet Falcon Series, Fan Jet Falcon Series E, Fan Jet Falcon Series F
Type certificates
A7EU, A7EU, A7EU, A7EU, A7EU, A7EU, A7EU, A7EU, A7EU, A7EU, A7EU, A7EU, A7EU
On this site
Dassault/Sud FAN JET FALCON 24 registered
Dassault MYSTERE FALCON 20-F5 12 registered
Dassault MYSTERE FALCON 200 9 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 7, 2026.