What was found
RT MLG OUTSIDE WHEEL WAS SMOKING ON TAXI IN.HYD FLUID PUDDLED UNDER WHEEL. ARRIVED ON SITE TO EVALUATE HYD LEAK. INSPECTED & FOUND AFT UPPER BRAKE PUCK ON #4 BRAKE ASSY. LEAKING. WASHED DOWN #4 BRAKE & WHEEL ASSY. TO REMOVE LEAKED HYD FLUID. CLEANING #4 WHEEL ASSY. JACKED RT MLG AND REMOVED #4 MLG WHEEL ASSY. REMOVED RT O/B BRAKE ASSY. VERIFIED RH OB BRAKE ASSY SHUTTLE VALVE & CAPS WERE LOCATED PROPERLY. INSTALLED OVRHLD RH OB BRAKE ASSY. INSTALLED ORIGINAL #4 MLG WHEEL ASSY. POWERED ON ACFT VERIFIED HYD FLUID QTY ACCEPTABLE. BLED RT O/B BRAKE ASSY. VERIFIED NO LEAKS. DOWN JACKED ACFT AND VERIFIED HYD FLUID QTY GOOD. ALL MAINTENANCE DONE IAW AMM 32-40-05 AND 32-42-05.