The federal government has picked two companies to replace 612 radar systems nationwide that date back to the 1980s as part of a multibillion-dollar overhaul of the nation’s air traffic control system.

Transportation Secretary Sean Duffy and the Federal Aviation Administration said Monday that contractors RTX and Spanish firm Indra will replace the radar systems by the summer of 2028. The administration set an ambitious goal of completing the overhaul by the end of 2028 near the conclusion of President Donald Trump’s current term in office.

“Our radar network is outdated and long overdue for replacement. Many of the units have exceeded their intended service life, making them increasingly expensive to maintain and difficult to support,” FAA Administrator Bryan Bedford said.

The FAA has been spending most of its $3 billion equipment budget just maintaining the fragile old system that still relies on floppy discs in places. Some of the equipment is old and isn’t manufactured anymore, so the FAA sometimes has to search for spare parts on eBay.

Technical failures twice knocked out the radar for air traffic controllers managing planes around Newark Liberty International Airport last spring, and those problems led to thousands of cancellations and delays at the major hub airport.