The Turn to Final
Base-to-final stall in a C172S over Tampa North Aero Park — recognizing and preventing the most common pattern accident
The scenario
Departing Tampa North Aero Park (X39), Tampa, FL — Runway 14, a 3,541-foot asphalt strip at 68 ft MSL. Elevation is negligible; the field sits in the flat Tampa Bay basin. You are conducting a local training flight: two full-stop landings to practice short-field technique and crosswind handling.
Conditions are VFR: OAT 24°C, dew point 18°C, altimeter 30.01, winds 160° at 8 knots gusting to 12 knots. That is a 20° crosswind from the right on Runway 14 (heading 141°). Visibility 10 SM, scattered clouds at 3,500 ft. A typical Florida afternoon — warm, stable, and benign. The field is non-towered (CTAF 122.8); you self-announce on the common frequency.
You have completed your first full-stop landing on Runway 14 without incident. You taxied back, performed a normal run-up, and are now on the downwind leg of your second approach. You are at 800 ft AGL, airspeed 90 KIAS, flaps up, heading roughly 321° (reciprocal of the runway). The crosswind is noticeable but manageable. You have announced your position on CTAF.
Aircraft: Cessna 172S, solo, within weight and balance, fuel adequate. Glass panel (G1000), fuel-injected Lycoming IO-360-L2A, fixed gear, fixed-pitch prop. Best glide 68 KIAS. Stall speed clean 48 KIAS; stall speed landing (full flaps) 40 KIAS. Vref (approach speed, short final) 65 KIAS.
Pilot: you — a Private pilot, current, roughly 180 hours total. You have 12 hours in the C172S; the rest of your time is in a C172N (carbureted, steam panel). The glass panel and fuel-injected engine are still relatively new to you. You are comfortable with the airplane but not yet automatic with it. This is your second landing of the day.
- {'label': 'Field', 'value': 'X39 · Tampa North Aero Park'}
- {'label': 'Runways', 'value': '14/32'}
- {'label': 'Elevation', 'value': '68 ft'}
- {'label': 'Aircraft', 'value': 'C172S'}
- {'label': 'Dominant phase', 'value': 'Takeoff / Landing'}
The decision
Before the decision tree — what do you know about base-to-final stalls in the C172S? (Pick all that apply.)
What the record shows
What the NTSB files show
NTSB CEN17FA111 (2017, fatal): A Cessna 172S conducting spin training maneuvers collided with a reservoir after the pilots failed to apply prompt and/or correct flight control inputs to recover from an intentional aerodynamic spin. The probable cause was the failure of the pilots to apply prompt and/or correct flight control inputs to adequately recover from the intentional aerodynamic spin. The accident occurred at altitude during training, but the recovery principle is identical: forward pressure on the yoke to reduce angle of attack, opposite rudder, and level the wings. Delay or incorrect inputs are fatal.
NTSB ERA14FA283 (2014, fatal): A Cessna 172S on an instructional night flight experienced a partial loss of engine power during initial climb after a touch-and-go landing. The pilots decided to turn back to the airport, which led to the aircraft exceeding its critical angle of attack and experiencing an aerodynamic stall. The probable cause was the partial loss of engine power, with a contributing factor being the pilots' decision to turn back — a low-altitude turn back after an engine anomaly is a classic stall/spin trap. The airplane stalled and impacted the ground.
NTSB WPR12FA230 (2012, fatal): A Cessna 172S stalled during an aggressive pitch-up maneuver shortly after takeoff and impacted terrain. The probable cause was the pilot's failure to maintain adequate airspeed during the maneuver. Contributing factors included alcohol impairment and an over-gross-weight aircraft. The lesson: maintain flying airspeed at all times, especially during turns and climbs.
NTSB LAX08LA191 (2008, fatal): A Cessna 172S impacted the ocean after a newly certificated pilot (72 hours total) intentionally performed a second stall/spin maneuver at low altitude with passengers aboard and failed to recover. The probable cause was the failure of the pilot to regain airplane control during an intentional stall/spin maneuver. The lesson: spin recovery requires immediate, correct inputs. Delay is fatal.
Regional precedents (FTW91DRG06, SEA07CA125, ERA12CA019, ERA10CA300) all show the same pattern: a base-to-final turn in which airspeed decays, the stall warning sounds, and the pilot either fails to recognize the warning or applies incorrect recovery inputs (pulling back instead of pushing forward). At 300–400 ft AGL, there is no altitude for a recovery attempt. The accident is inevitable.
Tampa North Aero Park (X39) has its own accident history dominated by loss-of-control inflight (27.3%) and loss-of-control ground (18.2%). The field's non-towered status and the off-field environment (medium development, low-density development, wooded wetland on both runway ends) make a base-to-final stall particularly unforgiving. There is no open field to land in; there is only the runway or the developed/wooded area adjacent to it.
The real accidents cited above occurred at other airports and in other aircraft — NOT at X39. The scenario is localized to X39 to make the off-field environment and the pattern geometry real for you as a student here.
Key lesson — A base-to-final stall in the C172S is the result of airspeed decay during the turn and flap extension. The stall warning horn sounds at roughly 5 knots above the stall speed — if you hear it, you are already in the danger zone. The recovery is immediate and correct: reduce angle of attack (forward pressure on the yoke), apply opposite rudder, level the wings, and apply power. At 350 ft AGL over Tampa North Aero Park, there is no altitude for a slow recovery. Prevention is everything: maintain 65 KIAS Vref on final, add flaps gradually, and go around if the approach becomes unstable.
Debrief — teaching points
Airspeed decay during the base-to-final turn is the #1 cause of pattern stalls.
The turn to final increases load factor (the wings must support more than the airplane's weight) and increases drag. Both effects reduce airspeed. Many pilots do not compensate with forward pressure on the yoke to maintain altitude, or they add flaps during the turn without adding power. The result is a rapid decay from 90 KIAS on downwind to 70 KIAS on final — dangerously close to the stall speed (40 KIAS landing). Recognize the decay early. Add power if needed. Reduce flaps if airspeed is dropping. Never allow airspeed to decay below 65 KIAS Vref on final.
A crosswind from the right on base means the turn to final is a LEFT turn INTO the wind.
On Runway 14 at X39, a wind from 160° is a 20° crosswind from the right. The turn to final (from base heading 321° to final heading 141°) is a left turn. A left turn into the wind requires more back-pressure to maintain altitude — the turn is tighter, the load factor is higher, and stall risk increases. Be aware of the wind direction relative to the turn. A turn into the wind is more demanding than a turn downwind.
The C172S stall warning horn is your last warning — if you hear it, you are already at or very near the stall speed.
The stall warning horn activates at roughly 5 knots above the stall speed. In a C172S with full flaps (30°), the stall speed is 40 KIAS — so the horn sounds at roughly 45 KIAS. If you hear the horn on final approach, you are at 45 KIAS or below. You have almost no margin. The correct response is immediate: reduce angle of attack (push forward on the yoke), add power, and reduce flaps if necessary. Do NOT pull back — pulling back increases angle of attack and deepens the stall.
Stall recovery is forward pressure on the yoke — not back pressure.
The instinct to pull back when the airplane feels like it is sinking is strong and wrong. In a stall, pulling back increases angle of attack and makes the stall worse. The correct recovery is to push forward on the yoke to reduce angle of attack below the critical angle. The nose will drop; airspeed will increase. Once airspeed is recovered, you can level off. In a spin, the recovery is the same: forward pressure to reduce angle of attack, opposite rudder to stop the rotation, level the wings, and apply power. Practicing stall recovery in a safe altitude (3,000 ft AGL or higher) is essential.
Vref (approach speed) for the C172S is 65 KIAS — maintain it on final.
Vref is the target approach speed on short final. For the C172S, Vref is 65 KIAS. This speed is chosen to be well above the stall speed (40 KIAS landing) and to provide a stable descent to the runway. Maintaining 65 KIAS on final is the primary defense against a stall. If airspeed is dropping below 65 KIAS, add power or reduce flaps. If the approach becomes unstable, go around.
Flap extension increases drag and reduces lift — add power when you add flaps.
When you extend flaps, drag increases and lift decreases. Both effects reduce airspeed and increase descent rate. If you add flaps without adding power, airspeed will decay rapidly. On final approach, add flaps gradually (10° at a time) and add power as needed to maintain 65 KIAS and a stable descent. Do not add full flaps (30°) all at once; the airspeed decay will be too rapid.
Go around if the approach becomes unstable.
An unstable approach is one in which airspeed is not stable, descent rate is not stable, or you are not aligned with the runway. If any of these conditions exist, go around. Advance the throttle to full power, reduce flaps to 10°, and climb back to pattern altitude. A go-around is not a failure; it is airmanship. The NTSB data shows that pilots who go around when the approach is unstable have better safety records than those who try to salvage a bad approach.
Built from the real accident record
Scenario built from NTSB CEN17FA111 (2017 C172S spin-recovery failure), ERA14FA283 (2014 C172S stall on turn-back after partial power loss), WPR12FA230 (2012 C172S low-altitude stall), LAX08LA191 (2008 C172S spin-recovery failure), and regional base-to-final stall precedents FTW91DRG06, SEA07CA125, ERA12CA019, ERA10CA300. Localized to Tampa North Aero Park (X39).
NTSB reports: CEN17FA111 · ERA14FA283 · WPR12FA230 · LAX08LA191 · FTW91DRG06 · SEA07CA125 · ERA12CA019 · ERA10CA300
ACS tasks: PA.VII.A — Approach and Landing · PA.VII.B — Go-Around / Rejected Landing · PA.VIII.A — Stall Prevention · PA.VIII.B — Stall Recovery · PA.I.H — Human Factors
Relevant FARs: §91.3 · §91.13 · §91.303
Step through the full decision tree, make the calls, and see where each choice leads — then debrief it with your CFI.
Open the interactive scenario →All sample scenarios · More Cessna 172S scenarios · More scenarios at X39