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

ST04138CH

Installation of Datalink Communications System supporting Air Traffic Services (ATS) using Iridium Satcom, and upgrade to Honeywell MK-III Communications Management Unit (CMU) for CPDLC Capabilities and CVR 120A for data link recording. Held by Nextant Aerospace, which holds 29 approved modifications in all. Last revised November 9, 2017. System: other and general.

What it applies to

Kind of product
Aircraft
Design holder
Embraer S.A.; Embraer S.A.
Models
EMB-135BJ (Legacy 600), EMB-135BJ (Legacy 650)
Type certificates
T00011AT, T00011AT
On this site
Embraer EMB-135 ERJ 135 and Legacy 119 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 7, 2026.