What was found
AFTER TAKEOFF, NR 3 ENGINE FIRE DET LOOP B ILLUMINATED, SWITCHED TO A LOOP AND FULL FIRE WARNING EXPERIENCED. WHEN PULLING THROTTLE BACK ALL INDICATIONS EXTINGUISHED. FHB EMERGENCY PROCEDURES C/W, ENGINE SHUTDOWN. FOUND NR 3 ENGINE HIGH PRESSURE VALVE CLAMP LOOSE. RESECURED OPS AND LEAK CHECK GOOD IAW L1011 MM 36-11-02. OPS CHECK OF FIRE DET LOOP A AND B, NO DEFECTS NOTED IAW L1011 MM 26-11-00.