As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING EMERGENCY LIGHT CHECK DURING WEEKLY EPSU (12WL) EMER R FAILED / REMOVED AND REPLACED 12WL BATTERY WITH INSPECTED BATTERY IAW AMM 33-51-38-000-002-A, 33-51-38-400-002-A. OPS CHECK GOOD. NO OTHER DEFECTS NOTED AT THIS TIME. BITE TEST GOOD."