What was found
DURING CRUISE FLIGHT THE RIGHT SIDE LOW FUEL PRESSURE ANNUNCIATOR BRIEFLY ILLUMINATED THEN WENT OUT AS THE AMBER FUEL XFEED ANNUNCIATOR ILLUMINATED, SIGNIFYING THE LOSS OF THE RIGHT SIDE FUEL BOOST PUMP. CORRECTIVE ACTION: FOUND R/H BOOST PUMP TO BE INTERMITTENTLY FAILING. REMOVED DEFECTIVE R/H BOOST PUMP P/N: 1D2-12 S/N: UNREADABLE AND INSTALLED OVERHAULED R/H BOOST PUMP P/N: 1D2-12 S/N: 12AV249. WORK DONE IAW KING AIR 90 SERIES MAINTENANCE MANUAL CH. 28-20-05. GROUND FUNCTIONAL TEST GOOD. NO FURTHER DEFECTS NOTED.