This SAE Aerospace Standard (AS) establishes the general requirements for the design, construction, acceptance and qualification test offlat cut-off pressure compensated, variable delivery hydraulic pumps, used in civil aircraft hydraulic systems. It also provides parameters for a Procurement Specification to be used in conjuction with this AS for each pump.NOTE: Hydraulic pumps may incorporate features such as a clutch in the input dirve, which will not be covered ty this standard.