ST00976WI

Installation of the Honeywell MK-VIII Enhanced Ground Proximity Warning System (EGPWS). Data required: (1) Midcoast Certification Drawing List No. 23-327G001 Revision E, dated February 27, 2002; (2) FAA Approved Midcoast Airplane Flight Manual Supplement, Document No. 23-327M002, Revision A, dated February 27, 2002; or later FAA Approved Revisions to (1) or (2). Held by Midcoast Aviation INC, which holds 227 approved modifications in all. Last revised March 10, 2004. System: other and general.

What it applies to

Kind of product: Aircraft
Design holder: Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company
Models: BH.125 Series 400A, BH.125 Series 600A, DH.125 Series 400A, HS.125 Series 600A, HS.125 Series 700A
Type certificates: A3EU, A3EU, A3EU, A3EU, A3EU
On this site: 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 8, 2026.