What was found
(CAN) ONE AIRCRAFT IN THE FLIEET CURRENTLY UNDEROING A 300 HR INSPECTION WAS FOUND TO HAVE A PLASTIC CAP FROM AN UNKNOWN SOURCE RESTING IN THE TAIL BELOW THE ELEVATOR BELLCRANK. THE CAP WAS FOUND TO BE FROM THE ANTENNA TUBE IN THE TAIL. AN INSPECTION OF THE FLEET ACFT WAS CARRIED OUT. THE CAP WAS FOUND MISSING FROM THIS ACFT. IN CONSULTATION WITH MFG ACFT IT WAS DEEMED TO BE OK TO CONTINUE UNTIL PARTS COULD BE PROCURED. THERE IS A CHANCE THAT IF THIS CAP RESTS IN A CERTAIN SPOT IT COULD RESTRICT ELEVATOR CONTROL MOVEMENT.