As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - FLT 3656 - CREW REPORTED NUMEROUS EMERGENCY LIGHTS ARE INOPERATIVE WHEN AIRCRAFT IS POWERED DOWN. MAINTENANCE REMOVED AND REPLACED THREE EMERGENCY LIGHT POWER SUPPLY UNITS (S/N 1611, 1148, 1721) IAW ATR MM. OPS CHECK WAS GOOD AND AIRCRAFT WAS RETURNED TO SERVICE. (M)