What was found
DEPARTING PBI, FIRE WARNING INDICATION ON NR 3 ENGINE DURING CLIMB-OUT. FOLLOWED CHECK LIST AND DISCHARGED BOTH FIRE BOTTLES. DUMPED FUEL AND RETURNED TO PBI. REPLACED FIRE LOOP AND BOTTLES. NR 3 ENGINE FIRE WARNING LIGHT ON DURING CLIMB-OUT AGAIN. RETURNED TO PBI. REMOVED AND REPLACED BOTH FIRE BOTTLES LEFT AND RIGHT NR 3 ENGINE FIRE LOOP, PER MM 26-11-00, FIRST TIME. AFTER SECOND ATB, REPLACED 2 PINS ON C/P D1498. OPS CHECK OK PER MM 26-11-01. REPAIRED FIRE WALL DETECTION HARNESS INSIDE NR 3 PYLON AND REPLACED FIRE WALL SENSOR AND OPS CHECK OK AS PER 26-11-01 AND MM 26-11-00. (M)