What was found
SYSTEM A QTY DECREASED DURING CLIMBOUT AT 10,000 FT. ON LOWER RUDDER POWER UNIT CONTROL, HYD SOLENOID VALVE LEAKING. REPLACED VALVE ASSY AND SEALS IAW MM 27-20-142-4. SYS "A" HYD SYS FILTERS REPLACED IAW MM 29-11-062-3, NO METAL FOUND IN SYS. R & R SYS A HYD PUMP CASE DRAIN FILTERS IAW MM 29-11-041-2, NO METAL FOUND. OPS CHECK OF RUDDER SYS AND LEAK CHECKED HYD VALVE AND FILTERS, OK. RAN ENGS 1 & 2, EXCERCISED ALL FLIGHT CONTROL SYS & FLAPS AND RESERVICED HYD SYS AFTER ENG RUNS. ACFT DOWNGRADED TO CHECK CAT II.