What was found
SHORTLY AFTER TAKE OFF THE CREW RECEIVED A LEFT ENGINE FIRE WARNING MESSAGE. THE CREW CUT OFF FUEL TO THE ENGINE AND THE FIRE EXTINGUISHED. THE CREW DECLARED AN EMERGENCY AND RETURNED TO DEPARTURE. THE FLIGHT LANDED SAFELY AND TAXIED TO THE GATE WHERE THE PASSENGER DEPLANED NORMALLY. MX INSPECTED AND FOUND 6TH STAGE BLEED DUCT LOWER CLAMP POPPED OFF INSIDE COWLING. INSTALLED NEW CLAMP AND GASKET. PERFORMED OPS AND LEAK CHECKS. OPS AND LEAK CHECKS GOOD.