What was found
SFO - WHILE PERFORMING TEST OF EMERGENCY LIGHT SYSTEM, EPSU UNIT L SHOWN ON FAULT. MAINTENANCE REPLACED EPSU. SYSTEM TEST OK. (M)
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
SFO - WHILE PERFORMING TEST OF EMERGENCY LIGHT SYSTEM, EPSU UNIT L SHOWN ON FAULT. MAINTENANCE REPLACED EPSU. SYSTEM TEST OK. (M)