![]() OUTFLOW VALVE:- 1/2ø FROM CLOSE FWD VALVE CLOSED. SWITCH CLOSES CONTACTS WHEN VALVE GATE IS 1/2ø FROM CLOSE. OUTFLOW VALVE ACTUATOR BRAKE:- 20 TO 29 VDC.ĪC ACTUATOR CLUTCH:- NORMALLY ENGAGED, DISENGAGED WITH 28VDC. SYBY MODE:- CABIN PREPRESSURIZED TO 200 FT BELOW RUNWAY ELEVATION.ĬABIN ALT :- > 14,625 FT,OUTFLOW VALVE CLOSES. ![]() WHEN A/C CABIN PRESSURE IS 0.25 PSI FROM AMBIENT PRESSURE.Ģ.>1 PSI/MIN RATE OF PRESSURE CHANGE. MAIN DISTRIBUTION MANIFOLD RELIEF VALVE OPENS:-ġ7" WATER LIMITS TILL 27" WATER.ĬABIN PREPRESSURIZED TO 189 FT BELOW RUNWAY ELEVATION FOR T/O AND 300 FT BELOW RUNWAY ELEVATION FOR LANDING.ĬHANGE FROM ASCENT TO ISOBARIC SCHEDULE:. S4:- INLET MODULATION PANEL AND EXHAUST LOUVERS ALMOST CLOSED. S3:- AFTER S3 CONTROLLER RELEASED,FLAPS UP,230øF SENSOR TAKES OVER. S2:- FLAPS DOWN,A/C IN AIR,DEFLECTOR DOOR CLOSED.
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