Commercial Pilot ACS Study Guide: Power-On Stalls

Power-on stalls place the airplane in a demanding combination of high power, increasing pitch attitude, decreasing airspeed, and increasing angle of attack. They are designed to represent conditions that could develop during takeoff, initial climb, or a go-around if the pilot allows the airplane’s energy and attitude to deteriorate.

For the commercial pilot, the lesson extends beyond demonstrating a stall and recovery. Power-on stalls develop an understanding of departure stall recognition, directional control, coordination, and the aerodynamic consequences of allowing the airplane to reach its critical angle of attack during a high-power phase of flight.

The Departure Stall Scenario

A departure stall can develop when the pilot commands more from the airplane than its available energy can support.

Possible scenarios include:

  • Excessive pitch after takeoff
  • Allowing airspeed to decay during climb
  • Overrotation
  • Attempting to clear an obstacle by continuing to increase pitch
  • Improper pitch control during a go-around
  • Distraction during a high-workload departure
  • Improper trim or configuration

Unlike a training maneuver performed at altitude, an actual departure stall may occur close to the ground, where recovery options are limited.

The commercial-level objective is therefore recognition and prevention, not simply recovery.

Angle of Attack Is the Key

A wing stalls when it exceeds its critical angle of attack.

Published stall speeds are useful references, but they do not define the exact airspeed at which every stall will occur. Weight, load factor, configuration, center of gravity, turbulence, and maneuvering can all affect the airspeed at which the critical angle of attack is reached.

This is especially important during departure. An airplane can stall even when the airspeed indicator shows a value above its published wings-level stall speed.

The better question is not simply:

“What is my airspeed?”

It is:

“What is happening to my angle of attack and energy state?”

Why Power-On Stalls Feel Different

High power changes the handling characteristics of the airplane.

As airspeed decreases, the aerodynamic forces acting on the airplane change while propeller-related forces remain significant. The result is a maneuver that requires increasing attention to rudder and directional control.

In a single-engine airplane, the pilot must manage:

  • Torque
  • P-factor
  • Spiraling slipstream
  • Gyroscopic precession

These left-turning tendencies can become especially noticeable at high power, high angle of attack, and low airspeed.

This is why rudder discipline is such an important part of the maneuver.

Coordination Matters

As the airplane approaches the stall, allowing excessive yaw can significantly change how the stall develops.

If one wing reaches its critical angle of attack before the other, the airplane may experience a pronounced wing drop. If sufficient yaw is present when the stall occurs, the conditions for spin development may exist.

Maintain coordinated flight throughout the maneuver and avoid attempting to control yaw with aileron.

At low airspeeds, the pilot should be thinking:

Pitch. Power. Rudder. Coordination.

Recognize What the Airplane Is Telling You

Power-on stall awareness should come from several cues rather than waiting for the stall warning horn.

Look and feel for:

  • Increasing pitch attitude
  • Decreasing airspeed
  • Increasing control pressure
  • Reduced control effectiveness
  • Stall warning activation
  • Aerodynamic buffeting
  • Increasing rudder requirements
  • Difficulty maintaining directional control

These cues tell a story. The commercial pilot should recognize where that story is heading before the airplane reaches the stall.

Maneuver Setup and Entry

After completing appropriate clearing procedures and establishing a safe altitude, configure the airplane according to the ACS and the aircraft’s POH/AFM.

A power-on stall generally involves slowing the airplane, establishing the appropriate takeoff or departure configuration, applying the required power, and smoothly increasing pitch until the specified stall condition is reached.

Throughout the entry:

  • Maintain directional control
  • Remain coordinated
  • Use outside visual references
  • Avoid abrupt pitch changes
  • Continue scanning for traffic
  • Recognize changes in control feel

The maneuver should develop progressively. Rushing the entry reduces the training value and makes it more difficult to recognize the aerodynamic cues leading to the stall.

Recovery: Fix the Aerodynamic Problem First

When the stall occurs, the wing has exceeded its critical angle of attack.

The first priority is therefore to reduce the angle of attack.

From there, maintain appropriate power, correct any excessive yaw or bank, manage configuration as recommended by the manufacturer, and allow the airplane to accelerate before establishing the desired climb.

A common misconception is that adding power alone will recover the airplane. In a power-on stall, substantial power may already be applied.

Power cannot substitute for reducing angle of attack.

That is one of the most important concepts to understand for the checkride.

Don’t Trade One Stall for Another

A rushed recovery can lead directly into a secondary stall.

After the initial recovery, avoid immediately pulling the airplane back into an excessive pitch attitude. Allow airspeed to increase and rebuild the aerodynamic margin necessary for a safe climb.

The objective is to minimize unnecessary altitude loss while still respecting the airplane’s energy state.

A smooth recovery demonstrates better aircraft control than an aggressive one.

Bank Angle Changes the Picture

Departure stalls become particularly hazardous when combined with a turn.

Banking while maintaining altitude increases load factor, and increased load factor raises stall speed. If the pilot is already operating at low airspeed and then adds bank and back pressure, the remaining stall margin can disappear quickly.

This becomes especially important during:

  • Departure turns
  • Obstacle avoidance
  • Go-arounds
  • Missed approaches
  • Low-altitude maneuvering

A pilot should never assume that being above the published stall speed guarantees adequate stall margin.

The Real Lesson: Loss-of-Control Prevention

Power-on stalls demonstrate why precise aircraft control immediately after takeoff matters.

Imagine an airplane climbing at low airspeed while the pilot becomes distracted. Pitch gradually increases, coordination deteriorates, and the airplane begins turning. If the pilot responds by pulling harder instead of correcting the energy state, the situation can escalate rapidly.

At altitude, there is room to demonstrate and recover.

Immediately after takeoff, there may not be.

That is why the real lesson behind the maneuver is preventing the airplane from reaching that condition in the first place.

Common Errors

Watch for:

  • Inadequate clearing
  • Excessive pitch during entry
  • Poor rudder coordination
  • Failure to compensate for left-turning tendencies
  • Fixation on the airspeed indicator
  • Excessive bank
  • Delayed stall recognition
  • Incorrect recovery sequence
  • Excessive altitude loss
  • Aggressive pitch during recovery
  • Secondary stall
  • Loss of directional control

Commercial-level performance should appear deliberate and controlled from setup through recovery.

What the DPE Is Looking For

During the Commercial Pilot practical test, expect the examiner to evaluate your ability to:

  • Explain power-on stall aerodynamics
  • Establish the proper configuration
  • Maintain coordinated flight
  • Manage left-turning tendencies
  • Recognize an approaching stall
  • Maintain directional control
  • Reduce angle of attack promptly during recovery
  • Manage power and configuration appropriately
  • Avoid a secondary stall
  • Maintain positive aircraft control throughout the maneuver

Just as important, be prepared to explain why each action is necessary.

Checkride Knowledge

Before the checkride, make sure you can explain:

  • Critical angle of attack
  • Why power-on stalls represent departure conditions
  • How load factor changes stall speed
  • Why stall speed is not a single fixed number
  • The four left-turning tendencies
  • Why high power and low airspeed increase coordination demands
  • The relationship between stalls, yaw, and spins
  • Why reducing angle of attack is the first recovery priority
  • How secondary stalls occur
  • Why departure stalls are especially dangerous close to the ground

Understanding these relationships will prepare you for more than the maneuver itself—it will help you answer the scenario-based questions a DPE may use during the oral portion.

Final Takeaway

Power-on stall training is ultimately about maintaining control when the airplane is operating with high power and a decreasing aerodynamic margin.

The maneuver reinforces the importance of pitch discipline, rudder coordination, stall recognition, and understanding the airplane’s energy state during departure.

A commercial pilot should not simply know how to recover from a power-on stall. The greater skill is recognizing the developing conditions early enough that an unintended departure stall never occurs.

Manage the pitch, stay coordinated, and protect your stall margin.

FAA References

  • Commercial Pilot for Airplane Category Airman Certification Standards, FAA-S-ACS-7B
  • Airplane Flying Handbook, FAA-H-8083-3C
  • Pilot’s Handbook of Aeronautical Knowledge, FAA-H-8083-25C
  • Aeronautical Information Manual (AIM)
  • Aircraft-specific POH/AFM