As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PROCEDURE - TEST FAILED WITH MSG "EPSU COMM FWD L" SEE PIC ABOVE SHOULD READ EMERGENCY LIGHTING TEST PROCEDURE- PERFORMED TSM 33-51-00, FOUND EPSU COMM FWD LEFT FAULT. TESTED EPSU 10WL REF STEP 4B-1A NO EPSU LED'S CAME ON. REPLACED EPSU 10WL REF AMM 33-51-38. OPS CHECK GOOD.