When is it appropriate to manually select CLB 1 during flight?

Manually selecting CLB 1 during flight is appropriate when it is specifically directed by departure procedures. Departure procedures are established protocols designed to optimize aircraft performance, enhance safety, and ensure compliance with air traffic control requirements. These procedures often dictate the correct thrust settings to be used for climb based on various factors, including aircraft weight and environmental conditions. Selecting CLB 1 as instructed helps the aircraft achieve the necessary climb profile while adhering to operational guidelines.

Other contexts, such as passenger comfort or night operations, do not constitute standard practice for selecting CLB 1. Similarly, if an aircraft is in a stall situation, the focus would generally be on recovering from the stall instead of adjusting climb settings. Understanding these operational requirements and procedures is crucial for safe and effective flight management.