What was found
ENG 1 OVERHEAT LIGHT IS ON LEFT ENGINE OVERHEAT REDUCED POWER PER QRH LIGHT EXTINGUISHED. EMERGENCY DECLARED. PERFORMED LEAK CHECK ON ENGINE 1 PNEUMATICS, NO LEAKS FOUND. FOILED BLEED DUCTS AND PERFORMED HIGH POWER RUN. NO FAULTS. REPLACE D 4 ENGINE FIRE LOOPS M1757, M1758, M1759, M1760 PER FIM 26-10-0 0-810-805. FIRE LOOPS OPS CHECKED GOOD. OK TO CONTINUE ROTABLE PARTS CHANGE WAS INDICATED. TT 1430709 SN OFF 4304 DETECTOR, FIRE, OFF 29-2611-9-0002 3151 ON 29-2611-9-0002 4721 DETECTOR, FIRE, OFF 29-2611-9-0003 3116 ON 29-2611-9-0003 2551 DETECTOR, FIRE, OFF 29-2611-9-0004 7709 ON 29-2611-9-0004 1831 DETECTOR, FIRE, OFF 29-2611-9-0001 4304 ON 29-2611-9-0001 2968.