What was found
ON CLIMBOUT FL 20.0, LOST ALL POWER TO ENGINE FUEL PANEL, WITH NO GAUGE MOVEMENT AND NO GAUGE PRESSURE TO TEST. ON LANDING, AFTER APPROX 4 MINUTES TAXI, ALL POWER CAME BACK AND FUEL QUANTITY GAUGES RAN DOWN TO ACTUAL FUEL. FOUND FAULTY R996 RELAY AND REPLACED RELAY IAW WPM 28-21-01. ALL INDICATIONS CHECKED OK ON ENGINE GROUND RUN AND WITH AIRCRAFT IN FLIGHT MODE.