What was found
THE ENG 1 LOOP LIGHT ILLUMINATED WITH A SINGLE SOUND CHIME (SSC) AND THE LOOP LT ON THE MWP. AFTER 30 SEC THE LIGHT WENT OUT. A NORMAL TEST OF THE SYSTEM YIELDED A SSC AND THE LOOPS LIGHT ON THE MWP, BUT THE ENGINE 1 LOOP LIGHT WOULD NOT ILLUMINATE. LOOP-B WAS SELECTED AND A SUCCESSFUL TEST WAS PERFORMED. REMOVED AND REPLACED A-LOOP TEST RELAY 31WD. TESTED NR 1 AND NR 2 A-LOOPS AS PER MM 26-12-00. BOTH CHECKED GOOD.