What was found
DURING CLIMBING THRU 12,000 FT, A BANG WAS HEARD FROM RT ENG AND THEN EPR DROPPED. IAW QRH, PILOT SHUT DOWN THE ENG AND TURNED BACK. BORESCOPE INSPECTION REVEALED ONE 7TH HPC BLADE UNDER-PLATFORM FRACTURED, THE ADJACENT BLADE CRACKED AND SUBSEQUENT STAGE DAMAGED. TAIL NUMBER B-27013