https://www.cnbc.com/2019/03/14/iridium-aireon-satellites-gave-faa-key-data-in-737-max-investigation.html

Only a few months after SpaceX launched the last set of Iridium Communications satellites into orbit, the new network is helping deliver critical data to aviation officials.

The Federal Aviation Administration (FAA) grounded Boeing's 737 Max airplanes on Wednesday, after receiving data from air traffic surveillance company Aireon about the deadly crash of Ethiopian Airlines Flight 302.