WASHINGTON – Amtrak will resume Acela Express train service to Boston this weekend for the first time since the railroad pulled the high-speed fleet out of operation in April after discovering cracks in many of the trains’ brake discs.

Amtrak is slowly putting its 20-train Acela fleet back into service after the cars are outfitted with new brakes. Amtrak resumed limited Acela service on July 11 from New York to Washington.

An Acela train is slated to arrive in Boston on Saturday afternoon, and will depart the city on Sunday morning. Weekday service will resume on July 25 with one roundtrip from Boston to Washington.

The railroad also plans to increase the number of Acela trains operating during the week between New York and Washington to six starting July 25.