MIL-T-5522D, MILITARY SPECIFICATION: TEST REQUIREMENTS AND METHODS FOR AIRCRAFT HYDRAULIC AND EMERGENCY PNEUMATIC SYSTEMS (25 MAR 1966) [S/S BY MIL-STD-5522]., This specification establishes requirements for tests and methods for the testing of aircraft hydraulic systems designed in accordance with requirements of MIL-H-5440, MIL-H-8891, and of aircraft pneumatic systems designed in accordance with requirements of MIL-P-5518.