What was found
(CAN) AT 4 MILES FINAL FLAPS SELECTED TO 15 DEGREES NR1 ENGINE HYDRAULIC CAUTION LIGHT ILLUMINATED TOGETHER WITH ROD PRESSURE NR1 AND ROD HYDRAULIC NR1 AND MASTER CAUTION.STANDBY AND MAIN PRESSURES OBSERVED TO BE 1500 PSI FLAPS CONTINUED TO TRAVEL TO 15 DEGREES. STANDBY AND MAIN PRESSURES 3000 PSI. STANDBY AND MAIN PRESSURES OBSERVED NORMAL, HYDRAULIC QUANTITIES NORMAL. FLAPS OBSERVED AT 15 DEGREES. NR1 ENGINE HYDRAULIC PUMP CAUTION LIGHT REMAINED ILLUMINATED. UNEVENTFUL LANDING MADE. NR1 ENGINE DRIVEN PUMP REPLACED. FUNCTIONED SATISFACTORY.