What was found
INTERMITTENT FAULT LIGHT ILLUMINATED DURING CLIMB, ON THE FIRE PANEL FOR ABOUT 2 MINUTES, THEN EXTINGUISHED. ACFT GROUNDED. REPLACED THE NR 2 ENGINE FAN FIRE DETECTION HARNESS, IAW AMM 26-11-02-000-801, AND REPLACED THE 2 ENGINE UPPER FAN FIRE DETECTOR IAW AMM 26-11-01-400-802. REMOVED AND REPLACED THE LOWER FAN FIRE DETECTOR ASSEMBLY, RIGHT CORE FIRE DETECTOR ASSEMBLY, AND LEFT CORE FIRE DETECTOR ASSEMBLY IAW AMM 26-11-01. REMOVED AND REPLACED CORE FIRE DETECTION HARNESS IAW AMM 26-11-02. PERFORMED OPS CHECK OF ENGINE FIRE DETECTION SYSTEM, OPS CHECKED GOOD IAW AMM 26-11-00.