As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - DURING SCHEDULED PS CHECK MAINTENANCE, REPORTED THE AFT FLOOR PROXIMITY LIGHT HAD EVERY OTHER LIGHT INOPERATIVE. MAINTENANCE REMOVED AND REPLACED BATTERY PACK IN POWER SUPPLY UNIT 73WL. OPS CHECK WAS GOOD AND AIRCRAFT WAS RETURNED TO SERVICE. (M)