What was found
EPSU FAULT LEFT DISPLAYED WHILE DOING INTERIOR EMERGENCY LIGHT TEST. UNIT FAULTING WHILE DOING EPSU SELF TEST. REPLACED POWER SUPPLY UNIT AND BATTERY. OPS CHK GOOD.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
EPSU FAULT LEFT DISPLAYED WHILE DOING INTERIOR EMERGENCY LIGHT TEST. UNIT FAULTING WHILE DOING EPSU SELF TEST. REPLACED POWER SUPPLY UNIT AND BATTERY. OPS CHK GOOD.