During a takeoff flap landing, what is the required approach speed when arriving at the final?

In a takeoff flap landing, the required approach speed upon arriving at the final approach stage should be set at 105 KIAS (Knots Indicated Airspeed). This speed provides a balance between maintaining a safe margin above stall speed while also allowing for adequate control and responsiveness of the aircraft during landing maneuvers.

Using 105 KIAS allows the pilot to account for factors such as weight, wind conditions, and any necessary adjustments for glide slope correction, ensuring a stable approach. This speed is part of the T-6B training standards which equip pilots with a consistent approach speed that can be reliably replicated in various flight scenarios.

In contrast, the other options reflect speeds that do not align with the T-6B's standard approach speeds for takeoff flap landings. Using either too high or too low of an approach speed can result in challenges such as excessive float during landing or difficulty in controlling the aircraft, leading to undesired landing conditions. Therefore, 105 KIAS is the most appropriate and safest choice for approach speed in this scenario.