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

ST02993CH

Installation of Universal Avionics Systems, EFI-890R, UNS1Lw, ASU, SSDTU, and RCU, Cobham Audio Control Panels, L3 Communications ESIS, WSI AV-350 and Astro-Med. Printer in accordance with AMES, Inc. Master Data List, Report No. 46220MDL01, Revision E, dated August 09, 2011, or later FAA approved revision. Held by Airborne Maintenance & Engineering Services (Ames), which holds 20 approved modifications in all. Last revised August 12, 2011. System: instruments and avionics.

What it applies to

Kind of product
Aircraft
Design holder
The Boeing Company
Models
DC-9-15
Type certificate
A6WE
On this site
Douglas DC-9 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 21, 2026.