What is the maximum flap extended speed specified for the aircraft?

The maximum flap extended speed, often referred to as Vfe, is a critical airspeed for pilots to understand as it dictates the highest speed at which flaps may be safely deployed. This speed is important for maintaining control of the aircraft during landing approaches and other maneuvers where flaps are used to increase lift.

In the context of the given choices, selecting 139 knots indicates that this speed is within the safe operational limits for extending the flaps. Extending flaps beyond this speed could lead to aerodynamic issues such as flap vibration, potential structural damage, or reduced overall effectiveness of the flap system. Thus, the choice reflects a safe operational practice, providing assurance that the aircraft can maintain stable handling characteristics while the flaps are deployed.

The other choices exceed this maximum flap extended speed, which means they are not advisable for flap operation. Knowing the correct Vfe is crucial for pilots to ensure the aircraft operates safely and efficiently during critical phases of flight.