As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#1 ENGINE FIRE DETECTION HARNESS MW0315 HAS BROKEN TERMINAL LUG AT FAN UPPER FIRE DETECTOR ASSY. GROUNDED - YES. REPAIRED TERMINAL LUG AT FAN UPPER FIRE DETECTOR ASSY ON MW0315 HARNESS #1 ENGINE OPS CHECK GOOD REF B737 SWPM 20-31-11 AND B737-800 AMM 26-11-00-710-801.