As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE NR 2 LOOP "A" WILL NOT TEST. TRANS TO DMI 12384 PER MEL 26-12-01 CAT "B" PLACARD INSTALLED. CHECKED NR 2 ENGINE "B" LOOP SYSTEM AND CHECKED OK. REF. DMI #12384 - ENGINE #2 LOOP "A" WILL NOT TEST. REMOVED AND REPLACED NR 2 ENGINE FIRE DETECTION CONTROL BOX. OPS CHECKED OK IAW M/M 26-11-12. THIS CLEAR DMI 12384 PLACARD REMOVED.