As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY MAINTENANCE, INOP EPSU EMERGENCY POWER SUPPLY UNIT EMERGENCY EXIT LT IN PASSENGER CABIN; (REF N/R 2020-172008) R & R EMERGENCY POWER SUPPLY UNIT (EPSU 11WL) ON EMERGENCY LT IN PASSENGER CABIN IAW AMM 33-51-38-400-001-A ITEM 1 THRU 4E AND AMM 33-51-00-710-001-A TEST IS OK.