What was found
VHHH-FLT NR 77068: FULL FIRE WARNING ON NR 3 ENGINE. BOTH FIRE BOTTLES DISCHARGED. INSPECTED NR 3 ENGINE. FOUND LOOSE FITTING ON FUEL NOZZLE AND BLOWN SEAL AT PRECOOLER DUCT COUPLING. RETORQUED AND SEALED AT PRECOOLER DUCT COUPLING - EDP FILTER CARTRIDGE MAGNETIC PLUG INSPECTION SATISFACTORY - RE-PROTECTED ADJACENT ELECTRICAL WIRES. LEAK CHECK OK AT FUEL NOZZLE FITTING DURING ENGINE RUN-UP. NR 3 ENGINE OK FOR SERVICE. REMOVED AND REPLACED LT AND RT NR 3 ENGINE FIRE EXTINGUISHING BOTTLE AND SQUIB CARTRIDGE IAW MM 26-21-03, PAGE 401.