As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C5 C-CHECK, INSPECTION NOTED THAT RIGHT OVERWING EXIT ARM LIGHT FAILED OPERATIONAL TEST. MAINTENANCE REMOVED AND REPLACED THE EMERGENCY POWER SUPPLY UNIT AND PERFORMED OPERATIONAL TEST, REFERENCE AMM 33-51-38-000-002 AND AMM 33-51-38-400-001.