WASHINGTON (AP) — The head of the Federal Aviation Administration will go back to Capitol Hill to explain how his agency approved the Boeing 737 Max, the plane that’s been grounded since two deadly crashes.

The Senate Commerce Committee said Tuesday that FAA Administrator Stephen Dickson will testify before the panel June 17.

Also Tuesday, committee Chairman Roger Wicker of Alabama introduced legislation to make changes in how FAA reviews new planes.

The Boeing 737 Max has been grounded worldwide since March 2019 after 346 people were killed in crashes in Indonesia and Ethiopia.