As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING OPS CHECK OF THE EMERGENCY POWER SUPPLY UNITS PTP DISPLAYS FAULT MESSAGE EPSU EXT LOAD EMR R. FOUND AFT RT OVERWING LIGHT TO BE BURNED OUT. WHEN INSPECTING THE LIGHT FOUND LIGHT HOUSING SPLIT IN HALF. REPLACED OVERWING LIGHT ASSY IAW AMM 33-51-15-400-001-A. OPS CHKD GOOD.