On which sides of the aircraft are the oxygen overboard discharge indicator and the oxygen servicing panel located?

• A. Left side only
• B. Right side only
• C. Both Left and Right sides
• D. Front nose section

Answer: (C)

The system is designed for maintenance access and clear monitoring from either side of the aircraft. The oxygen overboard discharge indicator shows when oxygen is vented overboard, and the oxygen servicing panel is where technicians connect equipment to check pressure, replenish, or service the system. Having these components on both the left and right sides ensures ground crews can service and observe the system from whichever side is most accessible during operations, door layouts, or galley arrangements. Placing them only on one side would hinder access and compliance with typical maintenance procedures, and placing them in the front nose section isn’t how these systems are arranged.