As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ELECTRIC WARNING LIGHT ILLUMINATED ON THE OVERHEAD PANEL. ACFT GROUNDED. FOUND STANDBY POWER INOPERATIVE ON ELECTRIC TEST. FAULT CLEARED. UNABLE TO DUPLICATE PROBLEM. REPLACED P5-5 MODULE IAW MM 24-21-52-000-801 AND 400-801, NO DISCREPANCIES NOTED. REPLACED STATIC INVERTER IAW MM 24-34-21. OPS NORMAL. REPLACED MAIN AND AUX BATTERIES IAW MM 24-31-11. OPS NORMAL. ALL WIRING CHECKS GOOD AND TB'S, GD'S SECURE AND CLEAN. ALL OPS NORMAL. ELECTRIC LIGHT REMAINS OFF.