At what altitude does TAKEOFF mode switch to CLIMB mode when climbing with autothrottles engaged?

The transition from TAKEOFF mode to CLIMB mode in aircraft equipped with autothrottles is a critical part of the flight operation. In many aircraft systems, this switch occurs at an altitude of 1000 feet above ground level (AGL).

At this point in the flight, the aircraft has typically achieved a stable ascent following takeoff, and the systems are ready to optimize climb performance. The rationale for the change in modes reflects the need to shift from maximum thrust, which is crucial during the initial phases of flight to overcome drag and ensure a safe climb, to a more efficient climb setting. This allows for a smoother and more economical ascent to cruising altitude.

Understanding this transition is vital for pilots and those involved in flight operations to manage engine power effectively and facilitate a safe climb profile. The specified altitude also conforms to standard operational practices and guidelines established in aviation procedures.