As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ROUTINE MAINTENANCE, DURING WEEKLY CHECK FOUND L3 & R3 EMERGENCY LIGHTS EXIT MARKER LIGHTS ON DOORS INOPERATIVE. THE ESPU (12WL) SHOWING UNIT FAULT DURING BITE TEST. REMOVED & REPLACED THE ESPU (12WL) IAW AMM 33-51-38. OPS CHECKED GOOD.