What was found
(CAN) ON JUNE 10, 2003 DURING TAKE-OFF ROLL OF OUR FALCON 20 A/C, PILOT NOTICED A DECREASE IN OIL PRESSURE INDICATION WHILE ADVANCING LT ENGINE THROTTLE. PILOT INITIATED REJECTED TAKE-OFF. FLT CREW ADVISED ATC. RETURNED TO MAINT FACILITY. MAINT CONFIRMED THAT OIL PRESSURE TRANSMITTER WAS DEFECTIVE. REPLACED WITH SERVICEABLE COMPONENT ACCOMPLISHED & ENG RUN COMPLIED WITH, ALL INDICATIONS NORMAL. A/C RELEASED, COMPLETE CHECK FLT WAS COMPLETED SATISFACTORY WITH NO ABNORMALITIES. MAINT HAS ADVISED US OF THE FOLLOWING; AFTER REMOVAL AND VISUAL INSPECTION OF DEFECTIVE OIL PRESSURE TRANSMITTER,RESIDUAL TRACES OF THREAD TAPE USED ON AN TYPE FITTINGS WAS FOUND, WHICH CAUSED THE FALSE INDICATION.