As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE NR 1 FIRE DETECT SYSTEM "B" LIGHT WILL NOT ILLUMINATE. DEFER SYSTEM "B" PER MEL REF 26-6, CONTROL 11013, PLACARD INSTALLED. REF. DMI 11013 RESECURED LOOSE CONNECTOR NUT & CLEANED CONNECTOR ON NR 1 ENGINE FIRE DETECTION SYSTEM "B" AND OPS. CHECKED SATISFACTORY PER DHL B-727 M/M 26-11-001. THIS CLEARS DMI 11013.