What was found
LEFT ENGINE FIRE LOOP "A" DOES NOT RESPOND TO OVERHEAT/FIRE TEST. ACFT GROUNDED. VERIFIED DISCREPANCY. ACCOMPLISHED LEFT ENGINE ENGINE/APU FIRE DETECTION CONTROL MODULE BITE PROCEDURE, IAW FIM 26-10 TASK 801. FOUND LEFT ENGINE UPPER FAN DETECTOR FAULT. PERFORMED NR 1 ENGINE LOOP A FAN UPPER DETECTOR FAULT FIM 26-10 TASK 805 . FOUND DETECTOR RESISTANCE OPEN. ENGINE FIRE DETECTOR ELEMENT. REMOVED AND REPLACED IAW AMM TASK 26-11-01-000-801. PERFORMED LEFT ENGINE AMM TASK 26-11-00-710-801 ENGINE FIRE DETECTION, OPERATIONAL TEST. SYSTEM CHECKED NORMAL.