The green disk indicates which event?

The green disk indicates which event?

• A. Oxygen disk blowout
• B. Normal operation
• C. Low oxygen pressure
• D. High-volume cylinder

Answer: (A)

The oxygen system uses a rupture disk that serves as a one-time indicator of deployment. The green disk sits on the high‑pressure oxygen cylinder and stays in place during normal operation. When the system deploys—such as after a loss of cabin pressure—the rupture disk is designed to rupture and eject the green disk, which visually confirms that the oxygen flow has started. So a green disk being blown out indicates the oxygen disk blowout event. In contrast, normal operation would not involve a disk expelling, and low oxygen pressure or a high‑volume cylinder would be indicated by other warnings or gauges rather than a blown disk.

The oxygen system uses a rupture disk that serves as a one-time indicator of deployment. The green disk sits on the high‑pressure oxygen cylinder and stays in place during normal operation. When the system deploys—such as after a loss of cabin pressure—the rupture disk is designed to rupture and eject the green disk, which visually confirms that the oxygen flow has started. So a green disk being blown out indicates the oxygen disk blowout event. In contrast, normal operation would not involve a disk expelling, and low oxygen pressure or a high‑volume cylinder would be indicated by other warnings or gauges rather than a blown disk.