The Impossible Turn
Partial engine failure at 400 ft AGL, a tempting turnback, and the stall/spin trap that kills low-altitude pilots
The scenario
Departing Lakeland Linder International Airport (KLAL), Lakeland, FL — Runway 10, climbing out on a 090° heading. Field elevation 142 ft MSL. It is a hot, humid Florida summer afternoon: OAT 32°C, dew point 24°C, altimeter 29.92. Scattered clouds at 3,000 ft, visibility 10 SM. The runway environment off Runway 10's climb-out (heading 090°) is marginal: low-density development, open developed areas (parks/large lots), and patches of dense development to the east. Not ideal for an engine-out landing, but workable.
You are 400 ft AGL, climbing through 68 KIAS (Vy, best rate of climb), heading 090°, when the engine begins to sputter. Power is noticeably down — the tachometer is dropping. The airplane is still climbing, but barely. KLAL's tower is open 24 hours and is aware of your departure. You are in Class D airspace (ceiling 2,600 ft MSL).
Aircraft: Cessna 150M, solo, full fuel (18 gal usable), within limits. Continental O-200-A, 100 hp, carbureted, fixed-pitch prop, fixed gear. The airplane was airworthy at departure; nothing was written up. Density altitude is approximately 2,000 ft — high for a C150, but not extreme.
Pilot: you — a Private pilot, current, roughly 250 hours total. You did not apply carburetor heat during the run-up because the engine ran smoothly. You did not apply it after takeoff because you were focused on the climb and the engine sounded fine until it didn't.
The runway behind you (Runway 10 heading 090°) is 8,500 ft long — plenty of runway. But it is now 400 ft below you and receding. The question is not whether you can land on the runway; the question is whether you can get back to it without stalling the airplane in the turn.
- {'label': 'Field', 'value': 'KLAL · Lakeland Linder'}
- {'label': 'Runways', 'value': '5/23 · 10/28'}
- {'label': 'Elevation', 'value': '142 ft'}
- {'label': 'Aircraft', 'value': 'C150'}
- {'label': 'Dominant phase', 'value': 'Landing / Takeoff'}
The decision
Before we get into the decision tree — what do you already know about engine failure at low altitude in a C150? (Pick all that apply; this records your baseline.)
What the record shows
What the NTSB files show
NTSB CEN23FA401 (2023, FATAL): A Cessna 150K on an instructional flight experienced partial engine power loss due to fuel system blockage. The flight instructor failed to maintain adequate airspeed after the power loss, and the airplane stalled during a descending left turn at low altitude. The probable cause was fuel starvation and the instructor's failure to maintain airspeed.
NTSB CEN23FA077 (2023, FATAL): A Cessna 150H on an instructional flight lost engine power due to carburetor icing. The flight instructor failed to apply carburetor heat and subsequently failed to maintain control while maneuvering for a forced landing in dark night conditions. The airplane descended below safe altitude and impacted a farm field 1.2 miles short of the runway.
NTSB WPR09FA326 (2009, FATAL): A Cessna 150 on a personal flight from Lake Tahoe Airport entered a spin seconds after takeoff at approximately 100 ft AGL. The probable cause was partial loss of engine power due to a malfunctioning carburetor, combined with the pilot's failure to maintain adequate airspeed while maneuvering to return to the runway. High density altitude was a contributing factor.
NTSB WPR17FA152 (2017, FATAL): An experimental Jansen Pazmany PL-2 lost engine power shortly after takeoff. The pilot attempted to return to the runway but stalled and spun at approximately 200 ft 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, FATAL): A Rans S-10 Sakota experienced engine power loss shortly after takeoff and stalled/spun while maneuvering to land at 150–200 ft AGL. The probable cause was loss of engine power and pilot failure to maintain airspeed above stall speed.
NTSB ERA14FA123 (2014, FATAL): 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.
The consistent thread across all these events: after engine failure at low altitude, the pilot attempts a steep 180° turn back to the runway. The C150 (and comparable light aircraft) cannot sustain a steep turn at low altitude without stalling. The airplane demands more airspeed to maintain altitude in the bank than the engine can provide. The stall is inevitable. The spin follows. At 100–400 ft AGL, there is no altitude to recover.
The real accidents cited above occurred at other airports and in other aircraft — NOT at KLAL. KLAL has its own accident history (see field dominant patterns: loss of control in-flight 23.7%, loss of control on ground 19.4%, forced landing 17.2%). The scenario is localized to KLAL to make the off-field environment real and consequential for you as a student here.
The lesson is not 'try harder to make the runway.' The lesson is: after engine failure at low altitude, establish best glide (60 KIAS in the C150), accept a forward landing in the off-field environment, and do not attempt a steep turn back to the runway. The 'impossible turn' is impossible because the airplane does not have the performance. The pilot who tries it dies.
Key lesson — In a C150 at 400 ft AGL with partial engine power, a steep 180° turn back to the runway will stall the airplane before it completes the turn. The airplane cannot sustain the bank angle and maintain airspeed above stall. Establish best glide (60 KIAS), commit to a forward landing in the off-field environment, and accept the outcome. The alternative — a steep turn back to the runway — is fatal. Every NTSB accident in this scenario's seed list cites the same failure: the pilot attempted to return to the runway at low altitude instead of committing to a forward landing.
Debrief — teaching points
The C150 cannot sustain a steep turn at low altitude after engine failure.
The C150M has a stall speed of 47 KIAS clean and 42 KIAS in landing configuration. Best glide is 60 KIAS. In a 25–30° bank at low altitude with partial or no engine power, the airplane demands more airspeed to maintain altitude than it can generate. The stall is inevitable. Every NTSB accident in this scenario's seed list cites the same failure: the pilot attempted a steep turn back to the runway at low altitude and the airplane stalled. The 'impossible turn' is impossible because the airplane does not have the performance. Do not attempt it.
After engine failure at low altitude, establish best glide and commit to a forward landing.
Best glide in the C150M is 60 KIAS. When the engine fails at low altitude, lower the nose to 60 KIAS immediately, advise the tower, and commit to a forward landing in the off-field environment ahead. Scan for the best available surface — an open field, park, or large open lot. Do not try to stretch the glide or make the airport. The alternative — a steep turn back to the runway — will stall the airplane. A forward landing at 60 KIAS in an open field is survivable. A stall/spin at 200 ft AGL is not.
Carburetor ice in the C150 is insidious and forms in warm, moist air.
The C150's Continental O-200-A is carbureted. Carburetor ice can form at OATs well above freezing — even at 32°C — when humidity is high and the engine is at reduced power. The first symptom is engine roughness and a dropping tachometer, not a dramatic power cut. Apply full carburetor heat at the first sign of engine roughness in conducive conditions. Expect an initial RPM drop as heat melts ice; hold full carb heat on. The RPM will recover as the ice clears.
Fuel starvation in the C150 is usually caused by fuel selector left in OFF or a fuel system blockage.
The C150 fuel selector is BOTH / OFF — there is no left/right tank management. Fuel starvation is caused by the selector left in OFF (rare but fatal if unnoticed) or a fuel system blockage (contamination, debris, ice). Check the fuel selector during the run-up and confirm it is on BOTH. If the engine sputters and carb heat does not fix it, check the fuel selector. If the selector is on BOTH and the engine is still rough, the blockage is mechanical — declare an emergency and prepare for a forced landing.
At KLAL, the off-field environment off Runway 10 is marginal but workable.
The off-field environment off Runway 10's climb-out (heading 090°) is marginal: low-density development, open developed areas (parks/large lots), and patches of dense development. If the engine fails on the Runway 10 departure and altitude is insufficient to return to the airport, a forward landing in the open developed areas (parks/large lots) is survivable. Avoid dense development — houses, trees, power lines. The runway behind you is 8,500 ft long; if you can make it back, do so. But if the engine is failing and altitude is low, commit to a forward landing in the open areas ahead.
Density altitude affects the C150's climb performance significantly.
The C150M has a service ceiling of 12,900 ft and a rate of climb of 715 fpm at sea level (gross weight). At KLAL (142 ft MSL) with OAT 32°C, the density altitude is approximately 2,000 ft — high for a C150. The climb performance is reduced. After takeoff, the airplane is climbing at Vy (68 KIAS) but the rate of climb is marginal. An engine failure at 400 ft AGL on this departure leaves little margin. Recognize the C150's marginal climb performance in high density altitude and plan accordingly.
Built from the real accident record
Scenario built from NTSB CEN23FA401 (2023 C150K fuel starvation / stall on turnback), CEN23FA077 (2023 C150H carburetor ice / stall), CEN17FA281 (2017 C150F engine roughness / loss of control), WPR09FA326 (2009 C150 carb malfunction / stall on turnback at high DA), and regional precedents WPR17FA152, LAX93LA048, ERA14FA123, SEA90LA162 (all low-altitude engine-loss stall/spin events). Real accidents occurred at other airports — NOT at KLAL.
NTSB reports: CEN23FA401 · CEN23FA077 · CEN17FA281 · WPR09FA326 · WPR17FA152 · LAX93LA048 · ERA14FA123 · SEA90LA162
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 150M scenarios · More scenarios at KLAL