As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A ROUTINE OVERNIGHT SERVICE CHECK INSPECTION SANFORD MAINTENANCE REPORTED THAT BOTH AFT OVERWING ESCAPE HATCH 'EXIT' SIGNS WOULD NOT TEST. SANFORD MAINTENANCE FURTHER REPORT THE REMOVAL AND REPLACEMENT OF 2 EMERGENCY LIGHT POWER SUPPLY BATTERY PACKS. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED PER AMM 33-53-00. THE AIRPLANE HAS RETURNED TO SERVICE.