As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SFO - DURING THE TEST OF THE EMERGENCY LIGHTING SYSTEM, RECEIVED AN 'EPSU ARMED' MESSAGE ON THE CABIN INTERCOMMUNICATION DATA SYSTEM. MAINTENANCE DID A BITE TEST OF THE CABIN INTERCOMMUNICATION DATA SYSTEM AND PERFORMED AN EMERGENCY LIGHTS TEST. NO FAULTS WERE FOUND. OK FOR SERVICE. (M)