What was found
INFLIGHT WHEN LEVELING AT FLIGHT 330, LOOP A LIGHT ILLUMINATED ON NR 2 ENGINE. FOLLOWED QRH. PERFORMED BITE CHECK OF NR 2 ENGINE FIRE DETECTION CONTROL UNIT IAW MM 26-12-00-05-01, NO FAULTS , OPENED THE NR 2 ENG AND CHECKED RESISTENCE OF A LOOP RESPONDERS 22WD, H1 & H3 , ALL WITHIN LIMITS PER TSM 26-12-00 , ALSO PERFORMED NUMEROUS FIRE LOOP TESTS IAW M/M 26-12-00-05-01 UNABLE TO DUPLICATE FAULT, # 2 ENG "A" LOOP OPS GOOD AT THIS TIME. OPENED AND CLOSED # 2 ENG COWLINGS IAW 71- 13-00-03