As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FIRE DETECT LEFT FAIL MESSAGE RECEIVED FOUR SEPERATE TIMES DURING TAXI OUT. REMOVED AND REPLACED WIRE # 7324012016W18 AND 7324012017W18 DUE TO WIRES CHAFFING AT T-10321-1 AND T-1032-2 PER AMM 71-50-00. PERFORMED ENG 1 FIRE DETECTION OPS TEST. OPS TEST GOOD. PERFORMED ENGINE RUN NO FIRE DETECT LEFT FAIL MESSAGE.