As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AAR N/R S/N 9304353.(A3NB-33-6012) L-58-NO DOT, THE EMERGENCY LI GHT TEST FOR THE CIDS FAILS WITH THE MESSAGE"EPSU BATTERY AFT L? ATA33-51-38 REMOVED AND REPLACED EPSU BATTERY AFT L IAW A320 AMM 33-51-38-40 0-002-A. OPS TEST ACCOMPLISHED ON CUST CARD 18-3351-1-7907 SEQ. 464 IDT