Which of the following is part of the decompression PA?

• A. Gather belongings
• B. Put on lifejacket
• C. Leave your mask on. (FLUN)
• D. Open the window

Answer: (C)

During decompression, the priority is to ensure a reliable oxygen supply for everyone in the cabin. The PA to passengers will focus on getting masks on quickly and keeping them on until further instructions. Saying to leave the mask on matches that goal: it reinforces that once the oxygen mask is in place, you should keep it secured and continue breathing normally, because removing it too soon would risk losing oxygen and impairing alertness.

Other actions don’t fit the situation: gathering belongings could delay getting oxygen and securing attention on the critical task at hand; a lifejacket is not relevant to a cabin decompression (it's for water landings); and opening a window is unsafe and not possible to manage during a pressurized event.