What was found
AIRCRAFT WAS NOT GROUNDED: LEFT AFT MAIN FUEL PUMP, LOW PRESSURE LIGHT ILLUMINATED WITH PUMP ON. CYCLE THE SWITCH, LOW PRESSURE LIGHT GOES OUT, BUT COMES BACK ON SHORTLY AFTER. FOUND BACKSHELL OF NUMBER 1 AFT FUEL BOOST PUMP LOW PRESSURE SWITCH VERY LOOSE. CLEANED CONNECTOR PER 20-60-01 OF SWPM WITH CONNECTOR CLEANER AND CORROSION PROTECTION, SECURED BACKSHELL TO CONNECTOR AND RESECURED CONNECTOR. OPERATIONS CHECK GOOD AT THIS TIME.