As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TEST OF THE EMERGENCY LIGHTS FAILS WITH EPSU INT LOAD EMER R, EPSU BATTERY AFT L AND EPSU UNIT EMER L MESSAGES. R&R RIGHT OVER WING EPSU REF AMM 33-51-400-001-A. R&R AFT BATTERY OF EPSU REF AMM 33-51-38-000-002-A. OPS CHECK GOOD. NO FAULTS NOTED AT THIS TIME.