As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED. DURING EMERGENCY LIGHT TEST, EMERGENCY POWER SUPPLY UNIT (10WL) FORWARD LEFT AND DECODER ENCODER UNIT-B FAULTED. REMOVED AND REPLACED DECODER ENCODER UNIT-B, PER AMM 23-73-47 NO HELP. REMOVED AND REPLACED EMERGENCY POWER SUPPLY UNIT (AALA202101049022) (10WL), PER AMM 33-51-38.