As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DISCREPANCY: REFERENCE LP532313#3 EPSU BATTERY (12WL) FAILED EMERGENCY LIGHT TEST. AC WAS NOT GROUNDED AS A RESULT OF THIS SDR REPORTABLE EVENT, IT WAS A RON SCHEDULED HEAVY CHECK. CORRECTIVE ACTION: REMOVED AND REPLACED EPSU BATTERY (12WL) IAW AMM 33-51-38-000/400-002-A. OPS CHECK GOOD. AC OK FOR SERVICE. /END/.