As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING EMER LIGHT SYS TEST, EPSU BATTERY AFT L FAULT REPLACED AFT EPSU (13WL) BATTERY REF AMM 33-51-38/401. BATTERY FAULT CLEARED. BITE RETURNED L AFT EPSU INT LOAD FAULT. DURING TEST, EXIT LIGHT 52WL DID NOT FLICKER. EPSU (13WL) AND AFT CENTER AISLE OVERHEAD EMERG EXIT LIGHT(52WL) NIS DEN. M/L UPDATED. RESET POWER TO AFT EPSU 13WL. PERFORMED OPS CHECK PER AMM 33-51-00. OPS CHECK GOOD. BITE TEST PASSED WITH NO FAULTS AND ALL EMERG LIGHTS ILLUMINATE NORMAL.