As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON PRE-DEPARTURE CHECK LOWER AFT BODY OVERHEAT WOULD NOT TEST. TRANSFERRED TO DMI CONTROL 13029 PER MEL 26-10-2. PLACARD INSTALLED. SPECIAL PROCEDURES 26-10-2 COMPLIED WITH TO VERIFY SYSTEM OPERATION. REF DMI 13029 ON PRE-DEPARTURE CHECK LOWER AFT BODY OVERHEAT WOULD NOT TEST. REPLACED TEST SWITCH ON LOWER AFT BODY OVERHEAT PANEL. OPS CHECKED GOOD IAW B727 M/M 26-14-0. THIS CLEARS DMI 13029.