Which of the following statements correctly describes Critical Phases of Flight?

• A. It occurs only during ascent
• B. It is limited to cruise at level altitude
• C. It involves all operations below 10,000 feet including taxi, takeoff, and landing
• D. It occurs only during emergencies

Answer: (C)

Critical Phases of Flight are the parts of the flight where pilot workload and risk are highest, typically when the aircraft is operating in and around the ground and during early flight, so tasks like taxi, takeoff, and landing demand the most attention. The description that includes all operations below 10,000 feet, including taxi, takeoff, and landing, matches this idea, since these phases involve complex configuration changes, frequent communications, and close coordination with air traffic and other traffic. Above 10,000 feet, the workload generally relaxes as the aircraft is more stable and cruise is primarily automated, so it isn’t considered part of these critical phases. Emergencies can occur during any phase, but defining critical phases by emergencies would misrepresent when heightened attention is needed across standard operations.