What was found
(CAN) THE NR 3 ENGINE START VALVE OPEN LIGHT ILLUMINATED DURING CLIMB OUT. A/C RETURNED TO BASE. A/C INSPECTED AND THE START VALVE REPLACED DUE CRACKED. A/C RETURNED TO SERVICE. FAULT REOCCURRED DURING CLIMB. A/C RETURNED TO BASE. THE FUEL HEAT DUCT WAS FOUND CRACKED CAUSING WIRING DAMAGE (HEAT) AND THE START VALVE INDICATION. DETAILED ENGINE INSPECTION CARRIED OUT. THE FUEL HEAT DUCT WAS REPLACED AND AIRCRAFT WIRING REPAIRED AS REQUIRED. A/C RETURNED TO SERVICE. (TC NR 20060918010)