What was found
DURING INITIAL TAXI, FLIGHT CREW NOTED NR 2 HYDRAULIC SYSTEM PRESSURE INDICATION INOPERATIVE. FLIGHT CREW ELECTED TO RETURN TO DEPARTURE GATE FOR MAINTENANCE. AIRCRAFT RETURNED TO DEPARTURE GATE WITHOUT FURTHER INCIDENT. MAINTENANCE PERSONNEL FOUND NR 2 HYDRAULIC SYSTEM PRESSURE TRANSMITTER HAD FAILED. REPLACEMENT PART WAS NOT AVAILABLE AT CURRENT LOCATION. SYSTEM DEFERRED PER MEL. AIRCRAFT WAS RETURNED TO SERVICE. (M)