What was found
DURING TAKEOFF ROLL FOR THE FIRST FLIGHT OF THE DAY, WHILE APPROACHING 40 KNOTS THE RIGHT ENGINE OIL PRESSURE BYPASS ANNUNCIATOR AND MASTER CAUTION ILLUMINATED, ABORTED TAKEOFF. INSPECTED RT ENGINE CHIP DETECTOR LIGHT AND VISUALLY CHECKED OIL FILTER ALL FOUND SATISFACTORY, INSTALLED A NEW ENGINE OIL FILTER AND SEALS. RAN ENGINE AT TAKEOFF AND CRUISE POWER FOR 5 MINUTES, FILTER LEAK CHECK SATISFACTORY. ALL WORK PERFORMED IAW PW 545A MM CHAPTER 79-20-01 AND CESSNA 560XL MM CHAPTER 12-11-02.