As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT NOT GROUNDED.. PASSENGER CABIN, EPSU 11WL FAILED A CHECK OF THE CABIN LIGHTS AND SIGNS ILLUMINATED BY BATTERIES. PASSENGER CABIN, EPSU BATTERY 11WL REPLACED AND TESTED SERVICEABLE IAW AMM 33-51-38-400-002-A AND CHECK OF THE MANUAL OPERATION FROM THE TWO CONTROL PANELS AND OF ALL THE CABIN LIGHTS AND SIGNS ILLUMINATED BY BATTERIES PERFORMED SERVICEABLE IAW AMM 33-51-00-710-004-A.