As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - DURING SCHEDULED PS-2 CHECK, MAINTENANCE REPORTED THE EMERGENCY LIGHT FAILED THE OPERATIONAL CHECK. MAINTENANCE REMOVED AND REPLACED THE POWER SUPPLY UNIT BATTERY PACKS (S/N'S 1366, 1604) AT POSITIONS 62WL AND 73WL IAW ATR MM 33-51-21. OPS CHECK WAS GOOD AND AIRCRAFT WAS RETURNED TO SERVICE. (M)