What was found
PILOT NOTED THE RT ENGINE ITT INCREASING TO RED LINE. NOTED THE RT ENGINE FUEL FLOW INDICATION GOING TO DASHES ACROSS DISPLAY. NO ENGINE FIRE INDICATION NOTED. PERFORMED A PRECAUTIONARY ENGINE SHUTDOWN. MAINTENANCE PERSONNEL NOTED DIFFICULTY IN OPENING THE RT ENGINE LOWER COWLING AND SCORCHED PAINT ON COWLING PANELS. ON OPENING THE RT LOWER COWLING, FOUND THE RT ENGINE OUTBOARD SIDE BLEED AIR DUCT V-BAND COUPLING AT ENGINE CONNECTION BROKEN. LOCATED MISSING PORTION OF COUPLING LAYING IN COWLING. THE COUPLING BAND WAS BROKEN PERPENDICULAR TO COUPLING CIRCUMFERENCE AT SPOT WELD WHERE THE TEE BOLT HOLDER ATTACHED. THE RT POWERPLANT INSTALLATION SHOWED EVIDENCE OF HIGH HEAT DAMAGE.