As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEVERAL EMERGENCY LIGHTS INOP IN THE AFT CABIN ON THE L/H SIDE. BATTERY PACK WAS FOUND BAD. CORRECTIVE ACTION - REMOVED AND REPLACED BATTERY PACK AT M739 PER B767 AMM 33-51-07. OPS CHECK WAS GOOD. NOTE: AIRCRAFT WAS IN MAINTENANCE CHECK AT THE TIME THE ISSUE WAS FOUND. FAA PMI HAS BEEN NOTIFIED.