The current Private Pilot Airman Certification Standards define maneuvering during slow flight as controlled flight in cruise configuration at an airspeed where any further increase in angle of attack, increase in load factor, or reduction in power would produce a stall warning. The pilot must perform coordinated straight-and-level flight, turns, climbs, and descents without a sustained stall warning.

‍

Important source distinction: FAA-S-ACS-6C specifies cruise configuration for the current private-pilot task. The Airplane Flying Handbook also recommends practicing slow flight in configurations relevant to takeoff, climb, approach, landing, and go-around. Training can be broader than the exact practical-test task. Follow the current ACS, POH/AFM, and instructor direction.

‍

What slow flight teaches

The FAA handbook describes slow flight as low-speed, high-angle-of-attack flight with reduced control effectiveness. As speed decreases, larger control movements may be required, power demand can increase on the back side of the power curve, and yaw tendencies may become more noticeable in propeller-driven airplanes.

The goal is not to fly with the stall warning continuously active. It is to develop precise, coordinated control close enough to the warning boundary to recognize the airplane's cues and respond promptly if a warning occurs.

‍

Why pilots really learn slow flight

Takeoff, departure, approach, landing, and go-around all place the airplane at relatively low airspeed and, in some conditions, closer to the stall-warning boundary. Slow-flight training develops recognition of reduced control effectiveness, changing power requirements, yaw tendencies, and the need to coordinate pitch, power, bank, and rudder without losing situational awareness.

Operational example: During a go-around or a tightening base-to-final turn, a pilot who allows airspeed to decay while increasing load factor can move closer to the stall boundary at low altitude. Slow-flight training helps the pilot recognize those cues early and correct before the situation develops into a stall.

‍

Current FAA Private-Pilot Slow-Flight Standards

Configuration
Maneuver in cruise configuration for the current private-pilot task.

Minimum Completion Altitude
Complete the maneuver no lower than 1,500 feet AGL in a single-engine airplane or 3,000 feet AGL in a multiengine airplane.

Target Condition
Establish an airspeed at which any further increase in angle of attack, increase in load factor, or reduction in power would produce a stall warning.

Maneuvering
Perform coordinated straight-and-level flight, turns, climbs, and descents without a stall warning.

Altitude
Maintain the specified altitude within ±100 feet.

Heading
Maintain the specified heading within ±10 degrees.

Airspeed
Maintain the selected airspeed within +10/-0 knots.

Bank
Maintain the selected bank angle within ±10 degrees.

‍

The ACS appendix adds an important qualification: a momentary stall-warning activation caused by an environmental factor such as turbulence does not automatically make the performance unsatisfactory if the applicant recognizes it and corrects promptly. Continued deviation, failure to recognize it, or failure to correct it is different.

‍

Key deviations to check

The FAA handbook identifies slow-flight errors involving area clearing, altitude control during power reduction, excessive pitch, yaw correction, instrument fixation, configuration changes, power management, trim, division of attention, and failure to respond to a stall warning. These can be grouped into the following debrief questions.

‍

1. Did the airplane arrive at the target condition under control?

A smooth deceleration should preserve altitude and heading. A climb followed by rapid speed loss or an altitude drop during power reduction points to poor coordination of pitch and power.

2. Was the pilot using coordinated control?

High power and high angle of attack can increase left-turning tendencies in propeller-driven airplanes. Heading control alone does not prove coordination.

3. Was the selected speed stable without a sustained warning?

The handbook says five to ten knots above the 1 G stall speed can be a useful training target, but the current ACS defines the condition by proximity to the stall warning rather than one universal number. Aircraft cues, configuration, weight, bank, turbulence, and manufacturer information matter.

4. Were power and pitch changes matched to climbs and descents?

In slow flight, a small pitch change can produce a meaningful speed change, and power can have a strong effect on flight path. The controls remain coupled; no single control acts in isolation.

5. Did configuration changes cause an unplanned AOA change?

If training includes gear or flap changes, the pilot should anticipate the resulting trim, pitch, lift, and drag changes. The current private-pilot checkride task itself is in cruise configuration.

6. Did attention remain outside as well as inside?

The pilot still has to clear the area, maintain orientation, and avoid traffic. A perfect instrument trace does not establish an adequate visual scan.

‍

What flight data can help show

Useful fields may include:

• altitude and vertical-speed stability;

• heading or course stability;

• bank and pitch changes;

• groundspeed trend and FlytWERX eIAS when the active wind correction and atmospheric inputs are current;

• the timing of turns, climbs, descents, and recoveries;

• the relationship among eIAS, pitch, power-related flight-path response, and vertical speed;

• whether a warning-related correction produced an immediate change in AOA-related attitude or flight path.

‍

What the data may not show

A portable telemetry record may not include:

• angle of attack;

• stall horn, buffet, or control feel;

• slip/skid or yaw coordination;

• power, trim, flap, or gear position;

• the outside scan;

• why a correction was made.

A GPS groundspeed-only record cannot establish checkride airspeed compliance. FlytWERX eIAS is a separate calculated training estimate and can support maneuver review when the active wind correction and atmospheric inputs are current.

‍

A slow-flight debrief sequence

1. Entry: Was the area clear, altitude appropriate, and deceleration smooth?

2. Target condition: How was the target speed selected, and what stall-warning cues were available?

3. Control: Did altitude, heading, bank, and speed remain within the selected standard?

4. Coordination: What did the instructor or onboard indications show about yaw and rudder use?

5. Maneuver changes: What happened when turns, climbs, and descents were introduced?

6. Warning response: If a warning occurred, was it recognized and corrected promptly?

7. Recovery: Was the return to normal flight smooth and consistent with the POH/AFM?

8. Next focus: Select one correction tied to a specific phase.

‍

How FlytWERX can support the review

FlytWERX records available altitude, heading, groundspeed, vertical speed, pitch, bank, course, position, and flight-path data and organizes maneuvers for post-flight review. For supported live-flight sessions, it calculates eIAS using GPS-derived speed, current winds aloft, temperature, and the active wind correction. Those fields can reveal stability and timing. FlytWERX cannot independently identify an unrecorded stall warning, angle of attack, or coordination state, and eIAS remains an estimate rather than a direct aircraft airspeed measurement.

Frequently asked questions

Is slow flight flown with the stall horn on?

The current private-pilot ACS requires maneuvering without a stall warning. A brief warning caused by turbulence may not be unsatisfactory if it is recognized and corrected promptly, but a continuous warning is outside the task standard.

What configuration does the current private-pilot ACS require?

Cruise configuration. Training may also include other configurations to prepare for takeoff, approach, landing, and go-around situations.

What is the minimum completion altitude?

The task must be completed no lower than 1,500 feet AGL in single-engine airplanes or 3,000 feet AGL in multiengine airplanes.

What are the tolerances?

Altitude +/-100 feet, heading +/-10 degrees, airspeed +10/-0 knots, and bank +/-10 degrees.

Can GPS groundspeed or FlytWERX eIAS be used in a slow-flight review?

GPS groundspeed alone cannot establish the ACS airspeed tolerance because wind affects movement over the ground. FlytWERX eIAS can support maneuver grading and debriefing when its wind and temperature inputs are current, but the airplane's approved airspeed indication remains controlling in flight.

‍

Editorial and safety boundary

This article is educational. It does not replace instruction from a qualified flight instructor, the current Pilot's Operating Handbook or Airplane Flight Manual, approved school procedures, or the pilot in command's responsibility for safe operation. FAA practical-test tolerances are evaluation standards for the applicable certificate or rating; they are not a substitute for aircraft-specific procedures or sound judgment.

‍