What was found
DURING CLIMB OUT FROM KMEM, ENG 1 LOOP B FAULTED. PER FLT CREW THE ENG 1 B LOOP FAULT LIGHT FLICKERED ON AND OFF MULTIPLE TIMES THEN WOULD FAULT AND GO OUT AGAIN. THEN FAULTED AND STAYED FAULTED. THE LOOP TESTED GOOD ON THE GROUND AND WOULD NOT FAULT. PERFORMED VISUAL CHECK OF ALL NR 1 ENGINE B FIRE LOOPS. SHOOK ALL WIRE HARNESSES FOR FIRE LOOPS CHECKED CONNECTIONS. NO FAULTS NOTED INTERMITTENT OR LATCHED. REMOVED AND REPLACED NR 1 ENGINE FIRE DETECTION CONTROL UNIT. REF AMM 26-12-11-04. PERFORMED 5 FIRE LOOP TESTS ON NR 1 ENGINE. OPS TESTS GOOD AT THIS TIME.