What was found
UPON GEAR RETRACTION THE "LOW HYD FLO" ANNUNCIATOR RT SIDE ILLUMINATED AND REMAINED ON UNTIL THE GEAR WAS EXTENDED. RAN RT ENGINE SELECTED FLAPS DOWN, OPERATED SPEED BRAKES. DURING FLAP EXTENSION AND STAB MOVEMENT CYCLEC 2 OR 3 TIMES COULD NOT DUPICATE DISCREPANCIES. SHUTDOWN RT ENG 12-1-10. REMOVED THE RT PRESSURE FILTER, NO CONTAMINTION NOTED, OK TO INSTALL FILTER. INSTALLED NEW FILTER IAW ALL MM 29-11-04, REV 30 12-30-00. R & R RT HYD FLOW CHECK VALVE SWITCH ASSY IN REF TO MM 29-11-04, OPS AND LEAK CHECKED GOOD.