As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING #2 ENGINE HARNESS GVI PER TC842001 ON W/O 1008768, FOUND FIRE DETECTION HARNESS MW0325 WORN THROUGH BRAIDING BEYOND ACCEPTABLE LIMITS. GROUNDED - YES. REMOVED AND REPLACED FIRE DETECTION HARNESS MW0325 PER B737-900 AMM TASK 26-11-02-400-802. PERFORMED FIRE DETECTION OPERATIONAL TEST PER AMM TASK 26-11-00-710-801. OP CHECKS GOOD.