How will you know if you need to refer to the oxygen tables for minimum oxygen pressure?

How will you know if you need to refer to the oxygen tables for minimum oxygen pressure?

• A. Half amber box on SD page
• B. Full amber box on SD page
• C. Green box on SD page
• D. Red box on SD page

Answer: (A)

The key idea is that the system display uses color cues to tell you when to consult the oxygen minimum pressure tables. A half amber box on the SD page signals that you should reference those tables to determine the required minimum oxygen pressure. This cue keeps you from guessing and ensures you base the oxygen pressure on altitude and crew/passenger needs. Putting it together, the half amber box indicates a caution level that warrants checking the tables. A full amber box would imply a more urgent or degraded condition that requires following a different procedure. A green box means normal operation, so no table lookup is needed. A red box points to an actual fault or emergency where you act per the immediate memory items rather than referencing the minimum oxygen pressure tables.

The key idea is that the system display uses color cues to tell you when to consult the oxygen minimum pressure tables. A half amber box on the SD page signals that you should reference those tables to determine the required minimum oxygen pressure. This cue keeps you from guessing and ensures you base the oxygen pressure on altitude and crew/passenger needs.

Putting it together, the half amber box indicates a caution level that warrants checking the tables. A full amber box would imply a more urgent or degraded condition that requires following a different procedure. A green box means normal operation, so no table lookup is needed. A red box points to an actual fault or emergency where you act per the immediate memory items rather than referencing the minimum oxygen pressure tables.