What was found
(CAN) OUR AC WAS ABOUT TO DEPART WHEN DEFECT WAS SPOTTED. DURING A NORMAL PRE-FLIGHT PILOT WALK AROUND OUR PILOT NOTICED A GAP/ ABNORMAL SPACE BETWEEN THE LOWER ENGINE INLET AND THE UPPER MATING COWL. WE GROUNDED THE A/C TO AOG STATUS AND SENT AME`S TO RESCUE. AME`S DISCOVERED QTY. 3 MISSING MOUNTING HARDWARE BOLTS, NUTS AND WASHERS, WHICH ARE STILL MIA. ALSO QTY. 1 MOUNTING BOLT WAS FOUND STILL IN PLACE BUT WAS SHEARED OFF COMPLETELY AND THE APPARENT STRESS CAUSED THE ENGINE METAL MATING FLANGE TO BREAK A 1 INCH DIA. APPROX SECTION OFF AT THE FWD. OB AREA. AME REPLACED THE LOWER INLET ASSY. WITH SAME P/N AND S/N AND ADDED THE WIDER WASHERS MINOR REPAIR IAW MM 72-20-00-300-801-A01-001. A (SPR) SERVICE PR