What was found
L JET OVHT FAIL CAUTION MESSAGE INTERMITTENT. RAN QRH AND IT DID NOT RETURN UNTIL WE WERE PULLING INTO THE GATE. ONLY APPEARED FOR A COUPLE SECONDS EACH TIME. (FLIGHT 5253 FILED CLOSED)INSPECTED LH JET PIPE DETECTION SYSTEM IN REFERENCE TO AMM 26-11-04. WHILE INSPECTING LH JET PIPE SENSING ELEMENT CONNECTORS AND WIRING, FOUND A WIRING CONNECTION FROM LOOP B TO BE LOOSE. RESECURED LOOSE SENSING ELEMENT WIRE CONNECTION AND PERFORMED OPERATIONAL TEST OF LH ENGINE JET PIPE FIRE DETECTION SYSTEM IN REFERENCE TO AMM 26-11-00. OPS TEST GOOD AT THIS TIME. AIRCRAFT OK FOR SERVICE.