TM 55-4920-432-13&P PITOT AND STATIC SYSTEMS TESTER NSN:  4920-01-244-2146 GROUP COMPONENT MAINTENANCE MAINTENANCE TOOLS NUMBER ASSEMBLY FUNCTION AVUM AVIM & EQUIPMENT REMARKS 0305   Pressure Inspect .1 A Relief Replace .5 2,4 C Valve Calibrate _._* 1,2 C 0306 Hoses and Inspect .1 A Fittings Replace .5 2,4 A,C 0307 Filter/Oil Inspect .1 A Sump Replace .5 2,4 A,C 0308 Oil Reservoir Inspect .1 A Replace .5 2,4 A,C 0309 Check Valves   Inspect .1 A Replace .5 4 C 04 Motor and Inspect .3 A Pump Replace .5 4 C Assembly 05 Electrical system 0501 Capacitor Inspect .1 A,B Replace .5 2 C 0502 Transformer   Inspect .1 A,B Replace .5 2 C 0503   EMI Filter Inspect .1 4 A,B Replace .5 4 C B-5