“However, without an exemption from current safety regulations, the FAA cannot approve the final two MAX models, the MAX 7 and MAX 10, to fly passengers.”
Boeing found an anti-ice defect that can make the engine inlet break off and throw debris into the fuselage. The interim fix is pilots remembering to shut the system off within five minutes. Boeing wants the FAA to waive the safety rule so the MAX 7 can start earning money anyway. This is the same plane family that already crashed twice because Boeing leaned on pilots to cover a design flaw.