The Impossible Turn
Engine failure on initial climb, low altitude, and the temptation to turn back — a decision that kills pilots
The scenario
Departing Tampa Executive Airport (KVDF), Tampa, FL — Runway 05, climbing out on a 042° heading. Elevation 22 ft MSL. It is a clear, calm morning: OAT 22°C, light and variable winds, altimeter 30.01. Visibility 10+ SM. A textbook VFR day.
You are climbing through 300 ft AGL at 73 KIAS (Vy, best rate of climb) when the engine suddenly loses significant power. The tachometer drops 400–500 RPM. The airplane is no longer climbing — it is barely maintaining altitude. You are over a mix of low-density development, wooded wetland, and open developed areas (parks and large lots) — the off-field environment off Runway 18's climb-out. Runway 05 is behind you, roughly 0.6 nm away.
The airport is non-towered (CTAF). You are in Class G airspace below 3,000 ft MSL; above 3,000 ft you would be in the overlying Tampa Class B airspace. You are alone in the airplane, within limits, and the engine was running normally at takeoff.
Aircraft: Cessna 172N, solo, full fuel, within limits. Lycoming O-320, fixed-pitch prop, steam panel. The airplane had a recent annual inspection; nothing was written up.
Pilot: you — a Private pilot, current, roughly 180 hours total. You are familiar with KVDF. You have never experienced an engine failure in flight. Your instinct, right now, is to turn back to the runway.
- {'label': 'Field', 'value': 'KVDF · Tampa Executive'}
- {'label': 'Runways', 'value': '5/23 · 18/36'}
- {'label': 'Elevation', 'value': '22 ft'}
- {'label': 'Aircraft', 'value': 'C172N'}
- {'label': 'Dominant phase', 'value': 'Landing / Takeoff'}
The decision
Before we get into the decision tree — what do you already know about engine failure on initial climb and the 'impossible turn'? (Pick all that apply; this records your baseline.)
What the record shows
What the NTSB files show
NTSB CEN14FA435 (2014): A Cessna 172N experienced partial engine power loss during initial climb from Natchitoches Regional Airport due to an exhaust valve rocker retaining stud backing out. The pilot attempted a forced landing in a soybean field but overflew it and struck trees. The probable cause was partial loss of engine power combined with the pilot's failure to configure and fly the aircraft to land in the available field. The pilot did not survive.
NTSB WPR17FA152 (2017): An experimental Jansen Pazmany PL-2 lost engine power shortly after takeoff from El Monte, California. The pilot attempted to return to the runway but stalled and spun at approximately 200 feet AGL, impacting terrain in a near-vertical attitude. The probable cause was fuel starvation and the pilot's decision to return to the runway at low altitude, which led to an aerodynamic stall and spin.
NTSB LAX93LA048 (1992): A Rans S-10 Sakota experienced engine power loss shortly after takeoff. The pilot stalled and spun while maneuvering to land at 150–200 feet AGL. The probable cause was loss of engine power and the pilot's failure to maintain airspeed above stall speed, with insufficient altitude for recovery.
NTSB ERA14FA123 (2014): A Sonex experimental aircraft experienced partial engine power loss due to an improperly seated spark plug during initial climb. The pilot made a steep 180-degree turn back toward the airport at low altitude, resulting in a stall and spiral descent into a canal. The probable cause was the pilot's failure to maintain adequate airspeed during the emergency return.
NTSB SEA90LA162 (1990): A Vaden SA102 Cavalier experienced engine power loss during initial climb. The pilot entered a spin when failing to maintain airspeed during the left turn. The probable cause was the pilot's failure to maintain airspeed following engine power loss.
The consistent thread: pilots who attempt a steep 180-degree turn back to the runway at low altitude after engine failure stall and spin. The 'impossible turn' is not a myth — it is a documented, repeatable mechanism of fatal accidents. The alternative — maintaining wings level, flying the airplane to the best available field ahead, and landing straight ahead — is survivable.
These real accidents occurred at other airports and in other aircraft types — NOT at Tampa Executive Airport (KVDF). KVDF's own dominant accident pattern includes LOSS_OF_CONTROL_GROUND (18.4%), HARD_LANDING (18.4%), and FORCED_LANDING (15.8%) — consistent with a busy, non-towered field with mixed pilot experience. The scenario is localized to KVDF to make the off-field environment real and consequential for you as a student here.
Key lesson — After engine failure at low altitude, the instinct to turn back to the runway is lethal. At 300 ft AGL, a 180-degree turn in a steep bank costs 300–500 ft of altitude. Stall speed in a steep turn is significantly higher than in level flight. The combination — low altitude, steep bank, reduced power, and the need to pull back to climb — creates a stall/spin trap that is unrecoverable below 500 ft AGL. The correct response is to maintain wings level, establish 65 KIAS best glide, and land straight ahead in the best available field. The runway behind you is not worth your life.
Debrief — teaching points
The 'impossible turn' is a documented stall/spin mechanism, not a myth.
At 300 ft AGL after engine failure, a 180-degree turn in a steep bank (25–30°) requires 60–90 seconds and costs 300–500 ft of altitude. You will be at or below ground level before the turn is complete. Stall speed in a 25° bank is roughly 50 KIAS; in a 30° bank, roughly 52 KIAS. If you are flying at 73 KIAS and pull back to climb, the airspeed drops. At 150–200 ft AGL, the stall develops. The left wing drops. You enter a spin. There is no altitude to recover. This is not a theoretical risk — it is the mechanism in NTSB WPR17FA152, LAX93LA048, ERA14FA123, and SEA90LA162.
Stall speed increases significantly in a turn.
In level flight, the C172N stalls at 48 KIAS (clean). In a 15° bank, stall speed is roughly 49 KIAS. In a 20° bank, roughly 50 KIAS. In a 25° bank, roughly 51 KIAS. In a 30° bank, roughly 52 KIAS. In a 45° bank, roughly 68 KIAS. The steeper the bank, the higher the stall speed. After engine failure at low altitude, a steep turn to return to the runway forces you to fly closer to stall speed. Any pull-back on the yoke to climb will stall the airplane.
After engine failure at low altitude, maintain wings level and accept a forward landing.
The correct response to engine failure at 300 ft AGL is: (1) lower the nose to 65 KIAS best glide immediately, (2) maintain wings level, (3) identify the best available field ahead, and (4) land straight ahead. This preserves altitude, maintains airspeed margin above stall, and gives you the best chance of survival. The runway behind you is not worth your life.
Off Runway 05's climb-out at KVDF, the off-field environment is generally good for a forced landing.
Off Runway 05 (heading 042°), the off-field environment is mostly wooded wetland, medium development, and pasture/hay. There are open fields and developed areas suitable for a forced landing. This is the runway to depart from if you are concerned about engine reliability. Off Runway 18 (heading 180°), the environment is mostly low-density development, wooded wetland, and open developed areas (parks and large lots) — marginal but workable. Off Runway 36 (heading 360°), the environment is mostly medium development, wooded wetland, and open water — ditching is a possibility.
Carburetor ice can cause partial power loss at low altitude.
In warm, moist conditions, the C172N's carbureted Lycoming O-320 can accumulate carburetor ice even in clear air. The first symptom is engine roughness and a dropping tachometer — not a dramatic power cut. If you experience unexplained power loss on initial climb, apply full carburetor heat immediately. The RPM will drop briefly (expected), then recover as the ice clears. This is the lesson from NTSB CEN24LA362.
Built from the real accident record
Scenario built from NTSB CEN14FA435 (2014 C172N partial power loss on climb, attempted forced landing), WPR17FA152 (2017 experimental aircraft stall/spin on attempted return to runway at low altitude), LAX93LA048 (1992 stall/spin after engine failure at 150–200 ft), ERA14FA123 (2014 Sonex stall/spin during 180° turn back at low altitude), and SEA90LA162 (1990 stall/spin after engine failure in climb). Localized to Tampa Executive Airport (KVDF).
NTSB reports: CEN14FA435 · WPR17FA152 · LAX93LA048 · ERA14FA123 · SEA90LA162 · CEN24LA362
ACS tasks: PA.I.F — Weather Information · PA.I.G — Cross-Country Flight Planning · PA.IX.C — Emergency Approach and Landing · PA.I.H — Human Factors · PA.II.B — Engine Starting / Systems Preflight
Relevant FARs: §91.3 · §91.13 · §91.185
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 172N scenarios · More scenarios at KVDF