During which phase does an aircraft typically climb?

The phase during which an aircraft typically climbs is during take-off until leveling off. This is the crucial part of a flight where, after the aircraft has gained enough speed and lifted off from the runway, the pilots execute a climb to reach cruising altitude.

During take-off, the engines produce necessary thrust, and the aircraft ascends at a specific angle to ensure a safe and efficient rise into the sky. Once the aircraft approaches its designated cruising altitude, leveling off occurs to establish stable flight before continuing on the flight path.

Other phases mentioned do not involve climbing. For instance, before landing, the aircraft is usually descending to prepare for approach and landing. When descending towards the runway, the altitude is being reduced, and in a holding pattern, the aircraft maintains a specific altitude rather than climbing. Hence, the focus on take-off and the transition into level flight solidifies the answer, highlighting the critical sequence of maneuvers in an aircraft's operation.