Which of the following indicates rapid decompression?

Which of the following indicates rapid decompression?

• A. Loud bang/rumble
• B. Rushing air/hissing sound
• C. Debris drawn in/forced out
• D. Haze in cabin

Answer: (A)

When cabin pressure is lost quickly, the most telling cue is an abrupt loud bang or rumble from the airframe as the fuselage ruptures or vents and air rushes out to the outside atmosphere. This sharp sound marks the sudden release of the high-pressure inside air and is typically the first and most recognizable sign of rapid decompression. You might also notice a strong rush of air past you, but sounds like a hissing can occur with slower decompression or through normal venting, so it’s not as definitive. Debris moving inside the cabin can happen due to the sudden pressure change, but it depends on what’s loose and where it is, so it’s less reliable as a universal sign. Haze in the cabin isn’t a direct indicator of rapid decompression and points more to smoke or mist sources rather than the pressure loss itself.

When cabin pressure is lost quickly, the most telling cue is an abrupt loud bang or rumble from the airframe as the fuselage ruptures or vents and air rushes out to the outside atmosphere. This sharp sound marks the sudden release of the high-pressure inside air and is typically the first and most recognizable sign of rapid decompression. You might also notice a strong rush of air past you, but sounds like a hissing can occur with slower decompression or through normal venting, so it’s not as definitive. Debris moving inside the cabin can happen due to the sudden pressure change, but it depends on what’s loose and where it is, so it’s less reliable as a universal sign. Haze in the cabin isn’t a direct indicator of rapid decompression and points more to smoke or mist sources rather than the pressure loss itself.