What was found
PHX - FLT 1862 - AFTER TAKEOFF, DURING CLIMB-OUT, LT ENG FIRE DETECT LOOP 'B' LIGHT ILLUMINATED FOLLOWED BY FIRE WARNING BELL. ACCOMP ABNORMAL PROCEDURE AND AIRCRAFT RETURNED TO PHX, LANDING OVERWEIGHT WITHOUT INCIDENT. REPLACED LT ENGINE AFT FIRE WARNING LOOP 'B' DETECT AND P1-828 CONNECTOR. SYSTEM GROUND CHECKED NORMAL OPERATION. ACCOMPLISHED O/W LANDING INSPECTION WITH NO DEFECTS FOUND. ACCOMP FUNCTIONAL CHECK FLIGHT PHX/DFW WITH NO DEFECTS FOUND. SYSTEM OP CHECKED NORMAL. (M)