What is the primary concern when adjusting to an unexpected altitude gain?

When adjusting to an unexpected altitude gain, the primary concern is regaining level flight attitude. This focus is essential for maintaining control of the aircraft and ensuring that it is in a stable state of flight. An unexpected altitude gain can potentially lead to flight instabilities, and regaining level flight allows the pilot to assess the situation properly and make informed decisions going forward.

By returning the aircraft to a level flight attitude, pilots can ensure that they are not inadvertently climbing further or entering a situation that could lead to stalls or other flight issues. In this context, regaining control and stabilizing the aircraft is of utmost priority, allowing the pilot to address any other necessary actions, such as communicating with air traffic control or assessing external conditions, once stability is restored.