When can movement of aircraft occur in relation to chocks?

Movement of aircraft can occur when chocks are removed because chocks are vital safety devices used to prevent aircraft from rolling or moving unintentionally. Removing the chocks signifies that the aircraft is clear for movement, ensuring that all safety protocols have been observed.

The sequence of operations around an aircraft is critical for safety. Once the chocks are removed, the aircraft is considered ready for taxiing, takeoff, or towing under the proper circumstances. It is essential that personnel ensure all safety checks are complete before allowing movement to avoid any accidents or mishaps.

Other choices focus on specific scenarios, such as after landing or during maintenance, where the aircraft may not necessarily be ready for movement or may still require chocks to be in place for safety. Prior to towing personnel arriving does not address the safety protocols regarding aircraft movement either. Thus, the action of removing chocks directly correlates to the readiness of the aircraft to be moved safely.