When does sterile flight deck end after takeoff?

• A. At or above 10,000 feet
• B. At 5,000 feet
• C. Immediately after takeoff
• D. After reaching cruise altitude, not specified

Answer: (A)

The idea behind a sterile flight deck is to minimize nonessential conversation and activities during high-workload, high-risk phases of flight. From taxi through takeoff and the initial climb, only essential, work-related communication is allowed. It ends when the aircraft is at or above 10,000 feet, at which point normal conversation and nonessential duties can resume per procedure. This altitude threshold is chosen because the immediate dangers of departure and early climb have passed, making it safer to lift the restriction. So, the end point is at or above 10,000 feet, not earlier and not tied to cruise altitude.