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

ST00121WI

Installation of Bendix/King CAS-66A TCAS I system. Held by Textron Aviation INC., which holds 68 approved modifications in all. Last revised March 9, 2018. System: instruments and avionics.

What it applies to

Kind of product
Aircraft
Design holder
The Cessna Aircraft Company
Models
650
Type certificate
A9NM
On this site
Cessna 650 Citation III, VI and VII 201 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 5, 2026.