What was found
VALVE WAS REMOVED FROM AIRCRAFT DUE TO INTERNAL BYPASSING CAUSING HYDRAULIC PUMP TO CYCLE CONTINUOUSLY. UNIT TIME IN SERVICE SINCE REPAIR: 37.3 HRS. SUBMITTER STATED LOW-TIME FAILURES OF THESE UNITS HAS BEEN COMMON IN FLEET OF 17 AIRCRAFT. INTERNAL BYPASSING CONDITIONS ARE COMMON IN BOTH OVERHAULED AND REPAIRED UNITS. AIRCRAFT TOTAL TIME: 10,697.7 HRS. TOTAL LANDINGS: 7,306.