What was found
EN-ROUTE THE PILOT REPORTED THAT THE LT & RT AIRSPEED INDICATORS WENT TO “0” INDICATION. THE PILOT DECLARED AN EMER WITH ATC. ON DESCENT THE AIRSPEED INDICATORS STARTED INDICATING NORMALLY, THE PILOT CANCELLED THE EMER WITH ATC & LANDED WITHOUT INCIDENT. FOUND THE PITOT HEAT WAS INOPERATIVE ON THE LT & RT PITOT MASTS. FOUND THE ELEC CONNECTOR THAT SUPPLIES POWER TO THE LT & RT PITOT MASTS WAS NOT FULLY SECURED. SECURED ELEC CONNECTOR, LT & RT PITOT HEAT FUNCTIONAL CHECKED NORMAL.