When should you lower the flaps and perform the before landing checklist?

The appropriate moment to lower the flaps and complete the before landing checklist is when you are established on the downwind leg of the traffic pattern. At this point, the aircraft is positioned to prepare for landing, allowing the pilot to manage the descent and configure the aircraft properly for the approach.

Establishing on the downwind leg provides the pilot with a clear view of the runway and traffic, allowing for an assessment of conditions and any necessary adjustments. Lowering the flaps at this moment helps in reducing airspeed and ensuring the aircraft is set up for a stable approach. Completing the checklist while on the downwind allows time to address any items that need attention before entering the critical phases of landing. Following this procedure promotes safety and increases the likelihood of a successful landing.