What was found
JUST AFTER TAKEOFF, ALL FUEL LOW PRESSURE LIGHTS ILLUMINATED WITH MASTER CAUTION LIGHT. EXECUTED AIR TURNBACK. RAN ENGINES TO TAKEOFF POWER, BITE TEST, AND DRIP STICK PER MM 28-22-00 OK FOR FLIGHT AS PRECAUTION IN PHX. REMOVED AND REPLACED FWD AND AFT LOW PRESSURE SWITCHES FOR FUEL TANK NR 2 AND FUEL HEAT MODULE.