What was found
(CAN) DURING FLIGHT THE PILOT NOTICE A LOSS OF FUEL INDICATION IN THE LT TANK. THE ACFT RETURNED WITH OUT INCIDENT. DURING THE INSPECTION OF THE SNAG IT WAS FOUND LT IMMERSION TUBE, FUEL TRANSMITTER, HAD COME APART. THE BOTTOM NUT THAT HOLD THE TUBE COVER OVER THE FLOAT HAD BACK OFF, ALLOWING THE TUBE TO SLIDE OFF. THIS BROKE THE WIRE FROM THE FLOAT TO THE TRANSMITTER. ALL PART WERE RECOVERED FROM THE FUEL TANK. A NEW TRANSMITTER WAS INSTALLED.