During a power-on-stall, what indicates that control effectiveness is lost?

During a power-on-stall, what indicates that control effectiveness is lost?

• A. Stick shakers (only)
• B. Stick shakers or airframe buffeting
• C. Uncommanded pitch up motion
• D. Uncommanded nose drop on rolling motion

Answer: (B)

During a power-on-stall, the indication that control effectiveness is lost is marked by the presence of stick shakers or airframe buffeting. Stick shakers are designed to provide a warning to the pilot that the aircraft is approaching a stall condition by creating a vibration at the control yoke. This feedback alerts the pilot to the impending loss of control effectiveness due to a stall. Airframe buffeting, which can occur due to airflow separation over the wings, further reinforces the understanding that the aircraft is not responding to control inputs as expected. The presence of either of these indicators signals to the pilot that the ability to maintain controlled flight is compromised, which is essential knowledge during stall recovery procedures. In contrast, other options focus on singular events or specific motions, which may not fully encompass the range of indications that denote a loss of control effectiveness during the critical phase of a stall. Thus, the combination of both stick shakers and airframe buffeting provides a more comprehensive warning about the loss of control during a power-on-stall.

During a power-on-stall, the indication that control effectiveness is lost is marked by the presence of stick shakers or airframe buffeting. Stick shakers are designed to provide a warning to the pilot that the aircraft is approaching a stall condition by creating a vibration at the control yoke. This feedback alerts the pilot to the impending loss of control effectiveness due to a stall.

Airframe buffeting, which can occur due to airflow separation over the wings, further reinforces the understanding that the aircraft is not responding to control inputs as expected. The presence of either of these indicators signals to the pilot that the ability to maintain controlled flight is compromised, which is essential knowledge during stall recovery procedures.

In contrast, other options focus on singular events or specific motions, which may not fully encompass the range of indications that denote a loss of control effectiveness during the critical phase of a stall. Thus, the combination of both stick shakers and airframe buffeting provides a more comprehensive warning about the loss of control during a power-on-stall.