You don't typically 'open' the oxygen mask compartment manually; the masks are released automatically during an emergency. Once released, you pull a mask towards you to start the flow of oxygen.
Understanding Oxygen Mask Release
Passenger oxygen masks on an aircraft are a critical safety feature designed to provide breathing air in the event of a sudden loss of cabin pressure.
Based on standard safety procedures and information like the provided reference:
- Passenger oxygen masks release whenever there's a drop in cabin pressure.
- Sometimes the flight crew might initiate the release.
- However, it usually triggers automatically when the cabin altitude gets to 14,000 feet.
The masks themselves are stowed in an overhead chamber above passenger seats. When the system is triggered, the compartment doors open automatically, and the masks drop down on elastic cords.
What to Do When Masks Drop
When the oxygen masks release from the overhead panel, follow these steps immediately:
- Pull the Mask: Pull the mask down towards your face. This action is crucial because it often starts the flow of oxygen. There might be a cord you need to tug on to activate the system.
- Place Over Nose and Mouth: Firmly place the mask over your nose and mouth. The elastic band goes around your head.
- Tighten: Pull the elastic strap to ensure a secure fit.
- Breathe Normally: Oxygen will be flowing. Breathe normally.
- Assist Others: If you are traveling with children or others who need assistance, put on your mask first before helping them.
Key Points:
- The initial 'opening' or release of the masks from the overhead compartment is automated or initiated by the crew.
- Your action is to pull the mask to activate the oxygen flow and then place it on correctly.
- The bags on the masks may not inflate, but oxygen is still flowing.
Here's a quick summary:
| Event Trigger | Passenger Action After Release |
|---|---|
| Drop in cabin pressure | Pull mask to start oxygen flow |
| Cabin altitude reaches 14,000ft | Pull mask to start oxygen flow |
| Crew initiates release | Pull mask to start oxygen flow |
Understanding this procedure is vital for your safety and the safety of those around you during an inflight emergency. Always pay attention to the pre-flight safety briefing.
