Which bottle pressure triggers the CKPT OXY label to display amber?

Which bottle pressure triggers the CKPT OXY label to display amber?

• A. 500
• B. 100
• C. 200
• D. 300

Answer: (C)

The moment you see the CKPT OXY amber display is the moment the cockpit oxygen bottle pressure has fallen to the low threshold set by the system. This amber warning is there to alert you that the crew’s oxygen supply is getting short and you need to take action (check the bottle, prepare to use reserve or portable O2, etc.). In this scenario, the threshold for triggering that amber indication is 200 psi, so when the cockpit O2 bottle pressure reaches 200 psi, the amber warning lights up. Pressure values that are still higher than this (like 500 or 300 psi) mean there’s still sufficient oxygen, so the amber warning wouldn’t be displayed. A much lower pressure (for example around 100 psi) would typically be more urgent and could trigger a different, more critical warning rather than amber.

The moment you see the CKPT OXY amber display is the moment the cockpit oxygen bottle pressure has fallen to the low threshold set by the system. This amber warning is there to alert you that the crew’s oxygen supply is getting short and you need to take action (check the bottle, prepare to use reserve or portable O2, etc.). In this scenario, the threshold for triggering that amber indication is 200 psi, so when the cockpit O2 bottle pressure reaches 200 psi, the amber warning lights up.

Pressure values that are still higher than this (like 500 or 300 psi) mean there’s still sufficient oxygen, so the amber warning wouldn’t be displayed. A much lower pressure (for example around 100 psi) would typically be more urgent and could trigger a different, more critical warning rather than amber.