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

ST00024WI

Installatin of a Bendix/King CAS-81 Traffic Alert and Collision Avoidance System. (TCAS II). Held by Midcoast Aviation INC, which holds 227 approved modifications in all. Last revised February 3, 1993. System: instruments and avionics.

What it applies to

Kind of product
Aircraft
Design holder
Hawker Beechcraft Corporation; Hawker Beechcraft Corporation
Models
BAe.125 Series 800A, HS.125 Series 700A
Type certificates
A3EU, A3EU
On this site
British Aerospace BAE 125 76 registered
Hawker Siddeley HS.125 SERIES 700A 7 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.