What was found
INFLIGHT HYD PRESSURE DROPPED TO ZERO. RUDDER AND AILERON MAN CONTROL LIGHTS ILLUMINATED, BUT HYD QUANITY IND WAS STUCK ON FULL. ON CLOSE EXAMINATION, FOUND HYD QUANITY INDICATOR NEEDLE STUCK ON RT SIDE OF FULL PEG. DETERMINED THAT ALL HYD FLUID LOST AND EXECUTED APPROPRIATE CHECK LIST. FOUND NR 2 PUMP SHAFT SEAL LEAKING. REPLACED ENGINE DRIVEN PUMPS, HYD RESERVOIR, CASE DRAIN FILTERS, RETURN FILTERS AND BOTH PRESSURE FILTERS PER M/M CHAP 29-10. BLEED AND LEAK CHECKED UNITS. REMOVED AND REPLACED HYD QUANTITIY INDICATOR PER MM 29-30-0.