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

ST00519DE

Installation to upgrade the existing VHF analog data link system to a VHF Digital Data Link (VDL) Mode 2 system. Held by Rockwell Collins INC, which holds 359 approved modifications in all. Last revised December 23, 2003. System: other and general.

What it applies to

Kind of product
Aircraft
Design holder
McDonnell Douglas Corporation; McDonnell Douglas Corporation
Models
MD-11, MD-11F
Type certificates
A22WE, A22WE
On this site
Mcdonnell Douglas MD-11 104 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.