It has been reported that there was an issue with the cockpit windshield and that the pilots even suspected a possible fire.

Certification and retrofit problems on two plane types are costing Lufthansa valuable lost revenue from fancy new Allegris ...

United flight 1879 from O'Hare to Los Cabos returned to Chicago shortly after departure due to an "issue with the cockpit windshield," the airline said. Emergency services met the plane before it ...