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

ST01085WI

Installation of Honeywell MK VIII Enhanced Ground Proximity Warning System (EGPWS) (with/without optional Avidyne Flight Max 800 MFD). Held by Blackhawk Aerospace Technologies INC., which holds 30 approved modifications in all. Last revised May 18, 2021. System: instruments and avionics.

What it applies to

Kind of product
Aircraft
Design holder
Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation; Beechcraft Corporation
Models
BH.125 Series 400A, BH.125 Series 600A, DH.125 Series 400A, HS.125 Series 400B, HS.125 Series 400B/1, HS.125 Series 401B, HS.125 Series 403A(C), HS.125 Series 403B, HS.125 Series 600A, HS.125 Series 600B, HS.125 Series 600B/1, HS.125 Series 600B/2, HS.125 Series 600B/3, HS.125 Series F400B, HS.125 Series F403B, HS.125 Series F600B
Type certificates
A3EU, A3EU, A3EU, A3EU, A3EU, A3EU, A3EU, A3EU, A3EU, A3EU, A3EU, A3EU, A3EU, A3EU, A3EU, A3EU
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.