What was found
INTERMITTENT FIRE WARNING IN FLIGHT AND ON TAXI IN, FIRE TEST AND SHORT CIRCUIT CHECKED NORMAL. INSPECTED FIRE LOOPS AND RELATED WIRING, NO DEFECTS NOTED, OPS CK NORMAL. REMOVED AND REPLACED RT AFT, LT FWD, RT FWD, AND AFT CENTER TOP FIRE LOOPS AS PRECAUTIONARY ACTION, NR 3 ENG FIRE WARNING CKS NORMAL AFTER COMPONENT CHANGES.