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

ST01393CH-D

Installation of a Honeywell/L3 Communications Traffic Alert and Collision Avoidance System (TCAS II) with MOPS Change 7. This STC only valid if previously equipped with STC ST09023SC. Held by Electrosonics, which holds 76 approved modifications in all. Last revised October 18, 2002. System: instruments and avionics.

What it applies to

Kind of product
Aircraft
Design holder
Raytheon Aircraft Company
Models
BAe.125 Series 1000A
Type certificate
A3EU
On this site
British Aerospace BAE 125 76 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.