What was found
LAS - DIVERSION - FLT 0221 - C - EN ROUTE FROM SMF TO PHX DURING CLIMB THE A-SYSTEM HYDRAULIC PRESSURE CYCLED AND WENT TO ZERO ACCOMPANIED BY A FLIGHT CONTROL AND A-SYSTEM PRESSURE LIGHT. AIRCRAFT DIVERTED TO LAS WITHOUT FURTHER INCIDENT. IN LAS MAINTENANCE FOUND A-SYSTEM HYDRAULIC LINE LEAKING AT ACOUSTIC FILTER IN THE LT WHEEL WELL AND REPLACED THE LINE. ALSO REPLACED WAS THE ENGINE DRIVE HYDRAULIC PUMP, ELECTRIC DRIVEN HYDRAULIC PUMP, AND A-SYSTEM HYDRAULIC QUANTITY TRANSMITTER IAW T/C'S R5M29002, R4R29001, R4M29002. A CONTAMINATION CHECK WAS ACCOMPLISHED IAW T/C F4M29002; OPERATIONAL AND LEAK CHECKS WERE GOOD.