What was found
AFTER TAKEOFF THE HYD A VOLUME BEGAN TO DECREASE APPROX 1PERCENT EVERY 6 MINS. VOLUME WENT FROM 53 PERCENT TO 33 PERCENT ON TAXI IN. ACCESSED PTO PUMP AREA. RAN A SYS, B SYS AND PTU AND AUX PUMP. FOUND AUX PUMP HYD MANIFOLD FITTING LEAKING, REMOVED MANIFOLD. REPLACED ALL O-RINGS ON MANIFOLD. NOTED EXACT LEAK SOURCE TO BE ERODED O-RING AND LOOSE MANIFOLD PLUG. REINSTALLED MANIFOLD. LEAK CHECK GOOD. WORK DONE IAW MM 20-10-10 R22.