Critical Phase of Flight includes which operations?

• A. All ground operations involving taxi, takeoff, landing and all other flight operations conducted below 10,000 feet.
• B. In-flight meal service time.
• C. The flight planning phase.
• D. The de-icing procedure.

Answer: (A)

The main idea here is what periods are considered the Critical Phase of Flight. This phase covers all ground operations such as taxi, takeoff, and landing, and also any flight operations conducted below 10,000 feet above the surface. That window is when the crew faces the highest workload and risk, so procedures and attention are at their peak. The option that matches this scope exactly is the one describing all ground operations plus anything below 10,000 feet, which aligns with how the critical phase is defined. In-flight meal service happens during cruise, well above this phase. Flight planning happens before the aircraft starts moving, outside the critical phase window. De-icing is a ground procedure performed before takeoff, but the definition here centers on taxi, takeoff, landing, and operations below 10,000 feet, which is why the other activities aren’t described as part of the critical phase in this context.