What was found
WHEN SELECTING GEAR UP ON T/O, MASTER CAUTION #2 ENG HYD PUMP CAME ON FOR ABOUT 1 SECOND. GEAR REMAINED STATIONARY WHILE THE MASTER CAUTION WAS ON. AFTER MASTER CAUTION WENT AWAY, GEAR RETRACTED AS NORMAL. PRESSURE WAS NOT ABLE TO BE OBSERVED WITH CAUTION ON BUT WAS AROUND 3,000 PSI FOR REMAINDER OF FLIGHT. REMOVED FROM SERVICE. PER MTX REQUEST, R&R #2 ENGINE DRIVEN PUMP IAW Q400 AMM 29-11-01-000/400-801. ALSO, DUE TO HISTORY, R&R #2 ENGINE HYD WARNING PRESSURE SWITCH IAW Q400 29-30-16-000/400-801. BLED #2 HYD SYSTEM AND RAN #2 ENGINE. PRESSURE/QUANTITY NORMAL. #2 ENG HYD PUMP CAUTION DID NOT ILLUMINATE. NO OTHER DEFECTS NOTED AT THIS TIME. AIRCRAFT RETURNED TO SERVICE.