Which statement is true regarding the sterile flight deck during descent?

Which statement is true regarding the sterile flight deck during descent?

• A. It begins at 5,000 feet
• B. It begins at 10,000 feet
• C. It begins at 15,000 feet
• D. It never begins

Answer: (B)

The key idea is that during descent, crews must minimize distractions to focus on critical tasks as you approach the runway. Sterile flight deck procedures kick in as you descend through 10,000 feet and continue through the approach and landing phases, so nonessential conversations and activities should be avoided to maintain situational awareness, properly configure the aircraft, monitor instruments, and coordinate with ATC. This is why beginning at 10,000 feet is the correct statement. Starting at 5,000 feet would ignore the defined threshold for the sterile period, starting at 15,000 feet would miss the descent/approach phase where discipline is required, and it does not never begin—the sterile period does begin during descent and toward landing.

The key idea is that during descent, crews must minimize distractions to focus on critical tasks as you approach the runway. Sterile flight deck procedures kick in as you descend through 10,000 feet and continue through the approach and landing phases, so nonessential conversations and activities should be avoided to maintain situational awareness, properly configure the aircraft, monitor instruments, and coordinate with ATC. This is why beginning at 10,000 feet is the correct statement. Starting at 5,000 feet would ignore the defined threshold for the sterile period, starting at 15,000 feet would miss the descent/approach phase where discipline is required, and it does not never begin—the sterile period does begin during descent and toward landing.