As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE B LOOP DOES NOT TEST NORMALLY. ACFT GROUNDED. FOUND WIRE HARNESS MW326 BROKEN AT TOP OF ENGINE AREA. REPLACED THE WIRE HARNESS ASSY AND RESET THE CIRCUIT BREAKER. OPS NORMAL IAW AMM 26-11-02. VERIFIED ENGINE FIRE TEST SWITCH IN NORMAL POSITION.