Oxygen Panel

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Usage

MASK MAN ON:

• AUTO:
  • This is the normal position for this switch. The cabin oxygen mask doors will open automatically when the cabin altitude exceeds 14,000 feet.
• ON:
  • The cabin oxygen mask doors open regardless of cabin altitude when the Oxygen Mask Manual on switch is selected to on.

PASSENGER SYS ON:

• This illuminates in white when the oxygen mask doors are actuated. It remains on until the OXYGEN TIMER RESET switch is pushed on the overhead maintenance panel.

CREW SUPPLY:

• OFF:
  • When the OXYGEN CREW SUPPLY switch is selected OFF, the OFF light illuminates white, and the oxygen supply valve is closed.
• ON:
  • When the OXYGEN CREW SUPPLY switch is selected ON, the OFF light extinguishes, and the cockpit oxygen supply valve is open. Low-pressure oxygen is supplied to the masks.

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