As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING EMERGENCY LIGHT CHECK, FOUND THE LEFT OVERWING EMERENCY POWER SUPPLY UNIT WITH INTERIOR LIGHT FAULT AND EXTERIOR LIGHT FAULT. REMOVED AND REPLACED THE POWER SUPPLY CONTROL UNIT AND BATTERY IAW AMM 33-51-38, PERFORMED EPSU OPS CHECK IAW AMM 33-51-38 AND OPS CHECKED GOOD. SYSTEM CHECKED OK, NO FAULTS NOTED.