As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING SERVICE CHECK EMERGENCY LIGHTS DID NOT TEST PROPERLY FROM SWITCH AT DOOR 1L. RED LIGHT ON POWER SUPPLY UNIT ILLUMINATED WHEN TEST BUTTON PUSHED. COMPLIED WITH EPSU OPS CHECK IAW MM 33-50-00-00. OPS CHECKED OK. NO FAULTS NOTED. GREEN LIGHT ILLUMINATED AND RED LIGHT STAYED OUT. OK FOR SERVICE.