As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY LIGHT FEEDER CABLE JUST FWD OF LEFT FWD ESCAPE HATCH AND SEA T 20ABC HAS CHAFED AND PINCHED WIRES. REMOVED THE FEEDER CABLE AND FOUND NO DEFECTS. REINSTALLED THE FEEDER CABLE, OPS CHECK FAILED. REMOVED AND REPLACED THE BATTERY PACK IAW AMM 33-51-00. OPS CHECKED GOOD IAW AMM 33-51-00.