As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6469, JFK-LCQ. DURING HEAVY MAINTENANCE, EPSU BATTERY PACK EMERGENCY R FAULT IS DISPLAYED ON THE PTP EMERGENCY LIGHTS TEST. REMOVED AND REPLACED RT EPSU BATTERY PACK (12WL) IAW AMM 33-51-38-000-002-A AND 33-51-38-400-002-A. OPS CKC GOOD IAW 33-51-38-710-052-B.