As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY MAINTENANCE, INOP EMERGENCY LIGHT POWER UNIT AFT RT AT AFT GALLEY AREA; REPLACED EMERGENCY LIGHT POWER UNIT (ELPU) AFT RT AT AFT GALLEY AREA IAW AMM 33-50-01-400-801-A. REF NR WO 2019-22/1 WCC 2019-43988. SUPPLEMENTAL INFORMATION TO FOLLOW.