What was found
(CAN) PILOTS REPORT: "NR 2 ENG HYD PUMP CAUTION LIGHT FLASHING. ASSOCIATED WITH CAUTION LIGHT WAS NR 2 SYS PRESSURE FLUCTUATING AND PTU PRESSURE. AFTER NOT MORE THAN 1 MINUTE OF FLASHING CAUTION LIGHT WAS STEADY WITH ASSOCIATED PTU PRESSURE BUT RN 2 SYSTEM PRESSURE STABLE AT 3000 PSI AND NO CHANGE IN NR 2 SYS QTY. QRH REFERENCED AND PARAMETERS MONITORED. AFTER 20 MINUTES CAUTION LIGHT WENT OUT AND NO FURTHER ADVERSE INDICATIONS. NORMAL APPROACH AND LANDING COMPLETED." NR 2 EDP REPLACED.