What was found
AIRCRAFT WAS NOT GROUNDED: SHUT DOWN ENGINE NUMBER 2 DURING TAXI IN. CAME TO A STOP PRIOR TO GATE TO WAIT FOR TAMPERS. ONCE IN PLACE, RELEASED PARKING BRAKE ANDAIRCRAFT WOULD NOT MOVE. ADVANCED THRUST TO 50 PERCENT AND NOTHING. STARTED THE NUMBER 1 ENGINE AND AIRCRAFT STILL WOULD NOT MOVE, EVEN WHEN ADVANCING PAST 45 PERCENT. CYCLED PARKING BRAKE 4 TIMES AND STILL WOULD NOT MOVE (RED LIGHT EXTINGUISHED EVERY TIME BRAKE WAS RELEASED). HAD TO BE TOWED IN. TUG DRIVER SAID HE PUSHED THE AIRCRAFT BACK BEFORE PULLING FORWARD INTO GATE. HE SAID WHEN RELEASING TOW BAR, THE NOSE WHEEL DID NOT MOVE BACK INTO A FORWARD POSITION. ALSO AIRCRAFT NOSE WHEEL WAS NOT IN A DIP ON THE RAMP, LEVEL AREA. ACCOMPLISHED GVI OF MLG AND NLG NO DEFECTS NOTED. ACCOMPLISHED TSM 32-42-00 TIRES ROTATED NORMAL NO BINDING BRAKES BRAKE SYS ACTUATED NORMAL. ACCOMPLISHED TAXI OF AIRCRAFT AROUND AIRPORT WITH SEVERAL STOP STARTS ALL WITHIN NORMAL OPERTIONAL LIMITS. SUSPECT HIGH WINDS A/C LOAD AND GATE LOCATION AS REASON FOR LACK OF MOVEMENT.