Slow Flight, the Maneuver the FAA Quietly Rewrote in Twenty Sixteen, and Why the Stall Horn Should Stay Quiet This Time

SUMMARY: FAA slow flight was rewritten in 2016 to keep the stall horn quiet - here’s how to fly and pass the current standard.

Slow flight is flying the airplane just above the speed where the stall warning activates - so the horn stays silent while the wing keeps flying. The FAA rewrote the maneuver in 2016, moving away from the old habit of demonstrating flight with the stall horn blaring continuously. Under today’s Airman Certification Standards (ACS), a continuous stall warning during slow flight is a disqualifying error on many examiners’ checkrides, because the goal is to teach respect for that lower edge - not comfort with it.

What Is Slow Flight, Really?

Slow flight is not a stall, and it is not the setup for a stall. It is its own skill: flying the airplane on the ragged front edge of its performance, where the wing is still doing its job but just barely, and you keep it there with your feet, your hands, and your eyes.

That ragged edge is exactly where you operate in the real world. Short final. Soft-field takeoff. A go-around with the flaps still hanging out. A steep, slow turn back toward the runway on a hot day from a high-altitude airport. Those are all slow flight. The maneuver is simply the classroom version of the most demanding moments of every flight you’ll make.

What Changed in 2016?

The old method - the one a first instructor might still teach - was to fly the airplane right down into the stall warning. You’d pull the power, raise the nose, keep coming back on the yoke until the horn blared, and then fly around with the horn screaming while holding altitude and making turns. The idea was to prove you could hang the airplane on the very edge of the stall.

The FAA recognized a problem: this trained a generation of pilots to hear the stall warning and treat it as normal - as a target. Then those same pilots would fly a real approach, hear the horn, and their brains would say, that’s fine, that’s just where we operate. That is exactly backward. The horn is supposed to make the hair on your neck stand up.

So the ACS was changed. The current slow flight is flown at an airspeed just above the speed where the stall warning activates. The horn should stay silent, or at most give an intermittent chirp. If the horn is blaring continuously on a checkride today, you’re not demonstrating the maneuver - you’re demonstrating that you can ignore a warning. The wing keeps flying. The horn stays quiet. That is the target.

How Do I Set Up Slow Flight, Step by Step?

1. Clear the area. Do two clearing turns, or at least a thorough look around. You’re about to get slow and nose-high, and your visibility over the cowling will shrink. Pick an altitude that gives you at least 1,500 feet above ground level for the recovery - though 3,000 feet AGL gives you room to make a mistake and learn from it.

2. Reduce power. Apply carburetor heat if your airplane calls for it. Bring the throttle back toward idle and hold altitude with pitch. Here’s the first common trap: as the airplane slows, the nose wants to drop, and students chase airspeed with the yoke instead of holding altitude. Be patient - raise the nose to hold altitude and let the airspeed bleed off.

3. Trim, trim, trim. Trim continuously as you slow. If you’re muscling the yoke through the whole maneuver, you skipped the trim, and your arm will let you know.

4. Configure and add power. As you approach target speed, add flaps if the maneuver calls for a configuration change, and start feeding in power. To fly level and slow, you need a lot of power and a lot of nose-up attitude at the same time. You’re on the back side of the power curve, where flying slower actually requires more power, not less. That feels wrong the first ten times. It isn’t. It’s physics.

What Should My Feet and Hands Be Doing?

Once established - nose high, power up, airspeed just above the stall warning - the airplane feels like a different machine. The controls are sloppy and mushy: you move the yoke, nothing happens, then a second later too much happens.

Your feet: right rudder, and lots of it. High power and low airspeed are the exact recipe for left-turning tendencies to gang up on you. If you’re not holding right rudder, the airplane is yawing left - and a yawing airplane near the stall is how a skid becomes a spin. Keep the ball centered with your feet, not the yoke.

Your hands: gentle and smart on the ailerons. Down low and slow, if a wing drops and you slam in aileron to pick it up, you can make it worse - the down aileron increases that wing’s angle of attack right when it’s already near its limit. Pick the wing up with a touch of aileron, but lead with rudder to stay coordinated. That coordination is what keeps you out of an incipient spin.

What Are the Checkride Tolerances for Slow Flight?

The examiner will have you fly straight and level, hold altitude within a band, make level turns to a heading, and possibly climbs and descents. Know your tolerances cold:

Private pilot standard:

• Altitude: within ±100 feet
• Heading: within ±10 degrees
• Airspeed: +10 knots and −0 knots

Read that airspeed tolerance again. Plus ten and minus zero. You can be a little fast. You cannot be slow - because slower means the stall warning, and the stall warning means you missed the point of the maneuver.

Commercial pilot standard: the bands tighten to ±50 feet of altitude, ±10 degrees of heading, and the same +10/−0 knots on airspeed. The examiner wants a pilot who can park the airplane on that edge and hold it like it’s on rails - while talking, turning, and staying coordinated.

What Are the Most Common Slow Flight Mistakes?

Mistake 1: Fixating on the airspeed indicator. You get slow, stare at the needle, and start chasing it - and while your eyes are locked inside, your altitude walks off 150 feet and your heading swings 20 degrees. Fly the attitude, confirm with the instruments, not the other way around. Set pitch against the horizon, set power, trim, then verify with a glance.

Mistake 2: Forgetting the rudder in turns. You roll into a left turn and forget you already needed right rudder just to fly straight. The turn, the power, and the low speed conspire, the ball slides out, and you’ve built a skidding turn at exactly the airspeed where a skid will bite. Watch the ball. Your feet are never still in slow flight.

Mistake 3: Ballooning or sinking with power changes. Power is altitude in this regime. Every throttle movement makes the nose want to move - be right there with pitch and trim to catch it. Small power changes, small corrections. Big shovel-loads of throttle mean you’re behind the airplane.

Mistake 4: Letting the recovery get sloppy. When the examiner says “recover,” that’s still a graded maneuver. Add full power smoothly, pitch for the right attitude, retract flaps on your airplane’s schedule (usually in stages), and don’t lose altitude or let the nose yaw left as the power comes in. A clean, coordinated recovery to cruise is part of the picture.

Why Does Slow Flight Matter in the Real World?

Picture yourself on final approach: slow, configured, flaps out, power back, nose coming up as you round out. That is slow flight. Every landing is a slow flight demonstration that ends with the wheels touching. If you can hold coordination, altitude, and airspeed on the edge in the practice area, you can grease it onto the numbers on a gusty day.

Now picture the go-around: too fast or too high, you firewall the throttle with the flaps still hanging down. Full power, low speed, nose coming up - that’s slow flight, and it’s the exact moment left-turning tendencies try to yaw you off centerline. The pilot who practiced coordinated slow flight applies right rudder without thinking. The one who never did stares at the airspeed and drifts toward the hangars.

Here’s the safety point worth repeating: the accident that kills the most pilots is the stall-spin at low altitude in the pattern, usually in a turn. Slow flight, done right, is the single best inoculation against it, because it trains your feet to keep the airplane coordinated when the wing is near the edge. That muscle memory comes from climbing to a safe altitude and living on that edge until the sloppy controls feel like home.

The current standard comes straight from the FAA’s Airman Certification Standards and the Airplane Flying Handbook. Go practice slow flight - not the old way with the horn screaming, but the new way: quiet horn, wing flying, feet dancing, eyes outside. Fly the edge on purpose, so you never find it by accident.

Key Takeaways

• Slow flight is flown just above the stall-warning speed - the horn should stay silent, not blare continuously as in the pre-2016 method.
• The 2016 ACS rewrite made a continuous stall warning a disqualifying error on many checkrides, because the horn should trigger alarm, not comfort.
• Private tolerances: ±100 ft altitude, ±10° heading, +10/−0 knots airspeed. Commercial tightens altitude to ±50 ft.
• Right rudder is essential - high power plus low airspeed maximizes left-turning tendencies, and an uncoordinated wing near the stall can spin.
• Fly attitude first and confirm with instruments; slow flight is direct practice for landings, go-arounds, and stall-spin avoidance in the pattern.