What was found
FUEL CROSSFEED HARDWARE: CROSSFEEDING LEFT TO RIGHT, BOTH FUEL BOOST L AND R ILLUMINATED ALONG WITH BOTH LO FUEL PRESS L AND R. CAME OUT OF CROSSFEED AND BOTH LO PRESS L AND R LIGHTS EXTINGUISHED. BOTH L AND R FUEL BOOST REMAINED ILLUMINATED. FOLLOWED THE CHECKLIST WHICH CALLS FOR THE FUEL BOOST SWITCH TO GO TO ON AND THEN NORM AND THIS RESOLVED THE ISSUE WITH THE FUEL BOOST LIGHTS. CORRECTIVE ACTION: REMOVED AND REPLACED L/H FUEL BOOST PUMP CARTRIDGE IN REFERENCE TO CESSNA 560XL MM 28-21-01. OPS AND LEAK CHECK GOOD