As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DISCREPANCY: REFERENCE LP514643 #3 CIDS 1 EPSU TEST 13WL AFT BATTERY FAILED. AC WAS NOT GROUNDED AS A RESULT OF THIS SDR REPORTABLE EVENT, IT WAS A RON SCHEDULED MAINTENANCE VISIT. CORRECTIVE ACTION: REMOVED AND REPLACED EPSU BATTERY IN REF AMM 33-51-38-000-002-A AND AMM 33-51-38-400-002-A. OPS TEST GOOD, AC OK FOR SERVICE. /END/.