As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 2 ENGINE OVERHEAT, FIRE DETECTOR B LOOP WILL NOT TEST. A LOOP OPS GOOD. ACFT GROUNDED. REMOVED MW0326 NR 2 CORE FIRE DETECTION HARNESS IAW AMM 26-11-02-000-802. COMPLETED INSTALLATION OF THE NR 2 ENGINE WIRE HARNESS IAW AMM 26-11-02. PLACED NR 2 ENGINE OVERHEAT DETECTOR SWITCH IN THE NORMAL POSITION. NR 2 ENGINE FIRE DETECTION OPS TEST CHECKED NORMAL IAW AMM 26-11-00.