What was found
WHILE IN CRUISE FLIGHT, THE LT AND RT AMBER FUEL BOOST ON CAS MESSAGES ILLUMINATED. RAN THE APPROPRIATE CHECKLIST WITH NO CHANGE NOTED. PRIOR TO CAS MESSAGES ILLUMINATING, HAD BEEN IN CROSSFEED. CROSSFEED WAS OFF APPROX 1 MINUTE BEFORE CAS MESSAGES ILLUMINATED. OPERATED ACFT ENGINES, OPERATED THE THROTTLES AT ALL SETTINGS, TRANSFERED FUEL LT TO RT AND RT TO LT, CROSSFEED CHECKED GOOD AT ALL THROTTLE SETTINGS. MANUALLY TURNED ON BOOST PUMPS LT AND RT, NO DEFECTS NOTED. DISCREPANCY DID NOT DUPLICATE ON GROUND, SHUT ENGINES AND POWERED DOWN. WORK DONE IAW MM 28-20-10.