As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#2 ENGINE B FIRE LOOP INOP. GROUNDED - YES. REMOVED AND REPLACED #2 ENGINE FAN FIRE DETECTION HARNESS MW0316 REFERENCE B737-900 AMM 26-11-02-400-801 AND 26-11-02-000-801. NO HELP. FOUND TERMINAL ON MW0326 BROKEN AT RIGHT HAND CORE FIRE DETECTION ELEMENT. REMOVED AND REPLACED MW0326 REF B737-900 AMM 26-11-02-400-802 AND 26-11-02-000-802.