What was found
(CAN) ON START UP, ENG NR 2 IN HIGH SPEED WITH ALL THE PARAMETERS STABILIZED, WHEN CLEARED TO START NR 1 ENG, A LOUD BANG WAS HEARD FOLLOWED BY ENG FIRE WARNING AND BELLS IN ZONE NR 2. FLAMES COMING OUT OF ENG COWLS, FIRE ON GROUND DRILL EXECUTED, FIRE WENT OUT. AFTER OPENING ENG NR 2 COWLS SEVERAL PIECES OF METAL FOUND ADRIFT AND COMPRESSOR DAMAGES NOTICED FROM MID-SECTION TOWARD TURBINE SECTION. QEC REPLACEMENT CARRIED OUT, THE ACFT RETURNED TO SERVICE, THE US ENG SENT TO MAIN BASE FOR INVESTIGATION.