As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE DETECTION CIRCUIT GROUND NR 3 LIGHT ILLUMINATED ON P6-3. TRANSFERRED NR 3 ENGINE FIRE WARNING GROUND FAULT DETECTOR SYSTEM TO DMI NR 13879, MEL REF 26-9 CAT "C". DMI EXPIRES IN 10 CONSECUTIVE CALENDAR DAYS. PLACARD INSTALLED. REPOSITIONED LOOP, SYSTEM OPS CHECKED GOOD PER M/M 26-11-001. THIS CLEARS DMI. PLACARD REMOVED.