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

ST01244AT

Installation of the CAS-81 TCAS II. Held by Honeywell International INC, which holds 599 approved modifications in all. Last revised November 19, 2021. System: instruments and avionics.

What it applies to

Kind of product
Aircraft
Design holder
Airbus; Airbus; Airbus
Models
A300 B4-600 Series, A300 B4-600R Series, A300 F4-600R Series
Type certificates
A35EU, A35EU, A35EU
On this site
Airbus A300 120 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.