As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LIGHTS FLICKERING IN COCKPIT. POSSIBLE LOSS OF ALL INSTRUMENT LIGHTING. DIVERTED TO DEN. FOUND LOOSE WIRE AT TERMINAL BLOCK BEHIND P6 PANEL, SECURED WIRE. PROVIDES POWER TO CAPT FLOODLIGHT STBY POWER RELAY. OVERHEAD LIGHTS FLICKER-REPEAT. REPAIRED WIRING, REPLACED K770-AC STBY TRANSFER RELAY AND K105 AC STBY POWER RELAY IN P6 PANEL.