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

ST04319CH

Certification of Automatic Dependent Surveillance - Broadcast (ADS-B) OUT System utilizing upgraded Aviation Communication & Surveillance Systems (ACSS) NXT-800 Mode-S Transponders paired with the GPS Source listed on AML number ST04319CH,. Held by Airborne Maintenance & Engineering Services (Ames), which holds 20 approved modifications in all. Last revised October 22, 2019. System: instruments and avionics.

What it applies to

Kind of product
Aircraft
Design holder
The Boeing Company; The Boeing Company; The Boeing Company
Models
757-200 Series, 767-200 Series, 767-300 Series
Type certificates
A2NM, A1NM, A1NM
On this site
Boeing 757 440 registered
Boeing 767 584 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 22, 2026.