What was found
RIGHT ENGINE WOULDN'T COME UP TO FULL POWER ON RUN UP ON RUNWAY BEFORE TAKEOFF. PILOT NEVER ATTEMPTED TAKEOFF, NOTIFIED TOWER AND PROCEEDED TO TAXI BACK TO RAMP WITHOUT INCIDENT. MAINTENANCE INSPECTED AND REPLACED LEAKING MANIFOLD GASKETS, COMPLIED WITH FULL POWER ENGINE GROUND RUN, OPERATIONAL CHECK NORMAL. NO FURTHER DEFECTS NOTED.