What was found
#2 ENG FIRE DETECTION LOOP B WILL NOT TEST PROPERLY. GROUNDED - YES. REPLACED MW0326 HARNESS & INSTALLATION TEST GOOD B737-900 AMM 26-11-02.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
#2 ENG FIRE DETECTION LOOP B WILL NOT TEST PROPERLY. GROUNDED - YES. REPLACED MW0326 HARNESS & INSTALLATION TEST GOOD B737-900 AMM 26-11-02.