Automatic Dependent Surveillance-Broadcast (ADS-B) is a system broadcasting, without the need for action from the pilot or any request from ATC, that provides an enhanced set of aircraft surveillance data to Air Traffic Management (and potentially to other airplanes)

Dual transponder system ADS-B upgrade in Part 25 aircraft

Modication of a Rockwell Collins Weather Radar System installation.

Modification of a Collins GPS-4000 or GPS-4000A

Modification of Collins TCAS II or TCAS-94 (TCAS II) system installation with Collins TTR-920 Change 7.0 Receiver Transmitter to a Collins TCAS II or TCAS-94 OTCAS II) system installation with Collins TTR-921 or Collins TTR-4000 Change 7.0 TCAS Receiver Transmitter.

Installation of a Reinforced Flight Deck Door. FAA STC ST01836WI