The Turn to Final
Base-to-final stall/spin in the pattern — recognizing the trap and executing the go-around
The scenario
Departing Albert Whitted Airport (KSPG), St. Petersburg, FL — Runway 25, landing pattern for Runway 25 (heading 242°). Elevation 7 ft MSL. You are a Private pilot with roughly 180 hours total, current and proficient. This is your home field.
It is a warm, humid Florida afternoon in late July: OAT 32°C, dew point 26°C, altimeter 29.89 inHg. Density altitude is approximately 2,800 ft — the airplane will perform as if it is at 2,800 ft elevation, not 7 ft. Scattered clouds at 3,500 ft, visibility 10 SM. Wind is from 240° at 12 knots, gusting to 18 knots — a direct crosswind on Runway 25.
You have completed a local flight and are now in the landing pattern for Runway 25. You are on downwind at 800 ft AGL, airspeed 90 KIAS, flaps 10°, descent rate stable. The runway is in sight. You are cleared to land by tower. You begin the turn to base.
Aircraft: Cessna 172R, solo, fuel 35 gallons (within limits), weight and balance within limits. The airplane is airworthy; nothing was written up. Fuel-injected Lycoming IO-360-L2A, fixed-pitch prop, fixed gear, steam panel.
The turn to base is routine. You are at 650 ft AGL, 85 KIAS, flaps 10°. The turn to final is ahead. The runway is aligned with your track. A gust hits from the left (from the west, off the bay) and the airplane rolls right slightly. You correct with left aileron and begin the turn to final.
- {'label': 'Field', 'value': 'KSPG · Albert Whitted'}
- {'label': 'Runways', 'value': '7/25 · 18/36'}
- {'label': 'Elevation', 'value': '7 ft'}
- {'label': 'Aircraft', 'value': 'C172R'}
- {'label': 'Dominant phase', 'value': 'Landing / Takeoff'}
The decision
Before we get into the decision tree — what do you know about stall/spin accidents in the pattern? (Pick all that apply; this records your baseline.)
What the record shows
What the NTSB files show
NTSB WPR21FA258 (2021): A Cessna 172R on a personal flight departed overweight at high density altitude, entered a box canyon, and stalled at low altitude. The probable cause was the pilot's failure to maintain airspeed and exceedance of the airplane's critical angle of attack. Contributing factors included the aircraft's weight exceedance and high density altitude, which degraded climb performance. The pilot did not recognize the stall warning or execute a recovery.
NTSB CEN14FA453 (2014): A Cessna 172R on a personal sightseeing flight failed to climb after takeoff and impacted terrain during an attempted return to the airport. The probable cause was the pilot's failure to maintain control during the return turn, which resulted in the airplane exceeding its critical angle of attack and entering an aerodynamic stall during the turn. Contributing factors included inadequate preflight planning that resulted in the airplane exceeding maximum gross weight.
NTSB WPR11FA242 (2011): A Cessna 172R stalled during a downwind turn while executing a go-around from a landing attempt at Wendover Airport and entered an unrecoverable spin. The probable cause was the pilot's failure to maintain adequate airspeed during the downwind turn. Contributing factors included inadequate preflight planning and exceedance of the approved weight and balance envelope.
NTSB LAX89LA222 (1989, fatal): A Grumman AA-1C aborted an approach and entered a low unstable pattern in gusting crosswind conditions. The airplane stalled on final approach and impacted the ocean short of the runway. The probable cause was the pilot's failure to maintain sufficient airspeed to prevent a stall at an altitude too low for recovery.
NTSB ERA10CA300 (2010): A Piper PA-18-135 stalled and entered a spin during a climbing right turn on final approach when the pilot attempted to perform a 360-degree turn per ATC spacing request. The probable cause was the pilot's failure to maintain adequate airspeed during the climbing turn. The pilot did not recognize that the maneuver exceeded the airplane's capability.
The real accidents cited above occurred at other airports and in other aircraft — NOT at Albert Whitted Airport (KSPG). KSPG's own accident history shows a dominant pattern of LOSS_OF_CONTROL_INFLIGHT (20%), FORCED_LANDING (16.4%), and STALL_SPIN (12.7%) — the same mechanisms as these NTSB cases. The scenario is localized to KSPG to make the pattern real and consequential for you as a student here.
The consistent thread across all these events: the base-to-final turn is the most dangerous turn in the pattern. The airplane is slow, the altitude is low, and the pilot is often distracted by wind gusts or trying to salvage an unstable approach. The stall warning — a buffet in the yoke or a horn — is the last chance to recover. Ignoring it or pulling harder on the yoke is fatal. The correct response is to release back pressure, add power, and execute a go-around if the approach is unstable.
Key lesson — At KSPG, the base-to-final turn in gusty crosswind conditions is a stall/spin trap. The demonstrated crosswind capability of the C172R is 10 knots; gusts beyond that require a go-around or a different runway. Maintain airspeed above the stall margin (at least 1.3 × Vs0 = 43 KIAS in landing configuration, higher in a turn due to load factor). Keep the bank angle shallow (15–20° maximum) during the turn to final. If the approach becomes unstable (low altitude, high descent rate, airspeed decaying, gusts), execute a go-around — do not try to salvage it. The stall warning is your last chance; if you hear it, release back pressure and add power immediately. A go-around is not failure; it is airmanship.
Debrief — teaching points
Stall speed increases in a turn due to load factor.
In level flight, the C172R stalls at 33 KIAS (Vs0, landing configuration). In a 20° bank turn, the load factor is 1.06 G, and stall speed rises to approximately 34 KIAS. In a 30° bank turn, load factor is 1.15 G, and stall speed rises to approximately 36 KIAS. At 45° bank, load factor is 1.41 G, and stall speed rises to approximately 39 KIAS. During the base-to-final turn, if you are at 85 KIAS in a 25° bank, you are only 50 KIAS above stall — a small margin. If you pull back on the yoke to maintain altitude, the airspeed decays and the margin shrinks. Recognize the load factor and maintain a speed buffer.
Wind gusts in the pattern demand immediate, decisive action.
A wind gust that rolls the airplane requires immediate correction with aileron. However, over-correcting with aileron while pulling back on the yoke in a slow turn can induce a stall. The correct response to a gust is to correct the roll with aileron, add power to maintain airspeed, and reduce the bank angle if necessary. If the approach becomes unstable (multiple gusts, high descent rate, airspeed decaying), execute a go-around. Do not try to salvage an unstable approach with aggressive control inputs.
The demonstrated crosswind capability of the C172R is 10 knots.
The C172R's POH specifies a demonstrated crosswind capability of 10 knots. At KSPG, the wind was from 240° at 12 knots, gusting to 18 knots. Runway 25 (heading 242°) is a direct crosswind. The gusts exceed the demonstrated capability. The correct decision is to request a different runway (Runway 07, heading 062°, would have a headwind component) or to divert to a field with lighter winds. Attempting to land in a crosswind that exceeds the demonstrated capability is exceeding your personal minimums.
The base-to-final turn is the most dangerous turn in the pattern.
The base-to-final turn combines low altitude, low airspeed, and a steep bank angle (relative to the other turns in the pattern). If a stall occurs during this turn, there is insufficient altitude for recovery. The NTSB data shows that stall/spin accidents in the pattern are concentrated on the base-to-final turn. Recognize this as the critical turn: maintain shallow bank angles (15–20° maximum), keep airspeed above 1.3 × Vs0 (at least 43 KIAS in landing configuration, higher in a turn), and be prepared to execute a go-around if the approach becomes unstable.
The stall warning is your last chance — respond immediately.
The C172R's stall warning is a buffet in the yoke. If you hear or feel the stall warning during the approach, the airplane is at or near its critical angle of attack. The correct response is immediate: release back pressure on the yoke, add power, and lower the nose to reduce the angle of attack. The airspeed will increase and the stall warning will stop. If the approach is unstable, execute a go-around. Pulling harder on the yoke when the stall warning sounds is the trap that leads to a stall/spin.
High density altitude degrades climb performance and reduces safety margins.
At KSPG on a warm, humid Florida afternoon (OAT 32°C, dew point 26°C), the density altitude is approximately 2,800 ft. The C172R performs as if it is at 2,800 ft elevation, not 7 ft. Climb performance is degraded, and the airplane is slower to gain altitude. If an engine failure or stall occurs on departure, the reduced climb performance means less altitude for recovery. Be aware of density altitude and its effect on your airplane's performance.
Built from the real accident record
Scenario built from NTSB WPR21FA258 (2021 C172R stall/spin, overweight/high DA), CEN14FA453 (2014 C172R loss of control on return turn), WPR11FA242 (2011 C172R stall on downwind turn during go-around), and local-environment precedents LAX89LA222 (1989 AA-1C stall on final in gusting winds), ERA10CA300 (2010 PA-18 stall during climbing turn on final), ATL92LA146 (1992 C172 stall on short final), ERA15LA257 (2015 PA-28 stall during final turn). Anonymized and localized to KSPG.
NTSB reports: WPR21FA258 · CEN14FA453 · WPR11FA242 · LAX89LA222 · ERA10CA300 · ATL92LA146 · ERA15LA257
ACS tasks: PA.I.F — Weather Information · PA.I.H — Human Factors · PA.III.A — Steep Turns · PA.III.B — Stalls · PA.III.C — Spins · PA.IV.A — Slow Flight and Stalls · PA.IV.B — Go-Around / Rejected Landing
Relevant FARs: §91.3 · §91.9 · §91.13
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 172R scenarios · More scenarios at KSPG