BEFORE STARTING ENGINES (CONT)
*3. Parking brake - Check. Confirm that brakes are set by applying additional toe pressure.
*4. Oxygen system - Check as follows:
Oxygen supply pressure gages -Check.
b. Supply control lever (green) -ON.
Diluter control lever - 100% OXYGEN.
Emergency control lever (red) - Set to TEST MASK position while holding mask directly away from
face, then return to NORMAL.
Oxygen masks - Put on and adjust.
Emergency pressure control lever - Set to TEST MASK position and check mask for leaks, then return
lever to NORMAL.
Flow indicator - Check (during inhalation blinker appears, during exhalation blinker disappears).
Repeat a minimum of 3 times.
Circuit breakers - Check in.
Overhead panel - Check.
Light dimming controls - As required.
Cabin temperature mode selector switch - OFF.