As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NRC 7000-0008: DURING THE CHECK OF THE MANUAL OPERATION FROM THE TWO CONTROL PANELS AND OF ALL THE EMERGENCIES CABIN LIGHTS AND SIGNS ILLUMINATED BY BATTERIES, FOUND EPSU BATTERY PACK 12WL INOP AT R/H SIDE. / EPSU BATTERY PACK AT 12WL REPLACED IAW AMM 33-51-38-400-002-A. SEE AWS-1 FOR TEST."