Uncoordinated Turn on the Climb
Carburetor ice, partial power loss, and an uncoordinated recovery attempt — stall/spin risk at low altitude in the Piper Warrior
The scenario
Departing Brooksville–Tampa Bay Regional Airport (KBKV), Runway 09, climbing out on a 090° heading. Elevation 76 ft MSL. It is a warm, humid Florida morning in late spring: OAT 26°C, dew point 21°C, altimeter 29.94. Scattered clouds at 2,800 ft, light rain shower three miles to the northeast. Visibility 9 SM. Classic Gulf Coast conditions — warm, moist air, exactly the environment the FAA icing probability chart marks as 'serious icing at glide power, moderate icing at cruise power.'
You are 350 ft AGL, climbing through 79 KIAS (Vy, best rate of climb), heading 090°, when the engine begins to run rough. Power is noticeably down — the tachometer is unwinding. The off-field environment ahead (heading 090°) is open developed land, pasture, and hay fields — good forced-landing terrain. KBKV's tower is part-time (0700–2200) and is open; you are in Class D airspace.
Aircraft: Piper PA-28-161 Warrior, solo, full fuel (48 gal total, 24 gal per tank), within limits. Carbureted Lycoming O-320-D, fixed-pitch prop, steam panel, fuel selector on LEFT tank. Nothing was written up; the airplane was airworthy at departure.
Pilot: you — a Private pilot, current, roughly 180 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 tower frequency.
- {'label': 'Field', 'value': 'KBKV · Brooksville–Tampa Bay'}
- {'label': 'Runways', 'value': '3/21 · 9/27'}
- {'label': 'Elevation', 'value': '76 ft'}
- {'label': 'Aircraft', 'value': 'PA-28-161'}
- {'label': 'Dominant phase', 'value': 'Landing / Cruise'}
The decision
Before we get into the decision tree — what do you already know about carburetor ice and stall/spin risk in the PA-28-161 Warrior? (Pick all that apply; this records your baseline.)
What the record shows
What the NTSB files show
NTSB LAX03LA238 (2003): A Piper PA-28-161 encountered carburetor ice during initial climb from Torrance, California. The engine lost power. During a go-around attempt (a recovery maneuver), the pilot failed to maintain adequate airspeed, resulting in a stall and collision with power lines and terrain. The probable cause was carburetor icing and the pilot's failure to use carburetor heat and maintain airspeed.
NTSB CHI05LA226 (2005, fatal): A Piper PA-28-161 on an instructional flight from Culver, Indiana, lost engine power due to left magneto failure during initial climb after takeoff. The flight instructor failed to maintain airspeed and follow emergency procedures. The airplane stalled. The probable cause was partial magneto failure (a maintenance issue) and the instructor's failure to maintain sufficient airspeed to avoid a stall. This accident is fatal.
NTSB CEN12FA188 (2012, fatal): A Piper PA-28-161 stalled during takeoff from a soft grass airstrip with a quartering tailwind and struck trees at the departure end of the runway. The probable cause was the pilot's failure to maintain airplane control during takeoff, which resulted in an aerodynamic stall. Contributing factors were inadequate preflight planning for the soft field conditions and failure to obtain a weather briefing. This accident is fatal.
The consistent thread across all these events: the PA-28-161 Warrior, despite its forgiving semi-tapered wing, is vulnerable to stall/spin accidents when airspeed is not maintained during low-altitude maneuvering — especially during a turn in an emergency or non-standard condition. Carburetor ice in warm, moist air is insidious; it builds gradually, the first symptom is roughness and a dropping tachometer, and by the time it is obvious, the pilot may be in a low-altitude turn trying to return to the airport. The fix — full carburetor heat, immediately, at the first sign of roughness in conducive conditions — is simple. The failure is always a delay, followed by an uncoordinated turn and a stall.
The real accidents cited above occurred at other airports and in other conditions — NOT at Brooksville–Tampa Bay Regional Airport. KBKV has its own accident history (see field dominant patterns), but these specific events happened elsewhere. The scenario is localized to KBKV to make the off-field environment real and consequential for you as a student here.
The off-field environment off Runway 09 (heading 090°) at KBKV is open developed land, pasture, and hay fields — good forced-landing terrain. An engine failure on the Runway 09 climb-out is survivable if you maintain airspeed, avoid an uncoordinated turn, and execute a controlled forced landing. The stall/spin is the killer — not the engine failure itself.
Key lesson — In warm, moist Gulf Coast air, the PA-28-161's carbureted O-320 can accumulate serious carburetor ice even at cruise power and above-freezing temperatures. Apply full carburetor heat at the first sign of engine roughness or unexplained RPM loss. At low altitude, an uncoordinated turn is a stall/spin setup — level the wings, lower the nose, regain airspeed. Do not try to tighten the turn or pull back to climb. Off Runway 09 at KBKV, the off-field environment is good — open land and pasture. A controlled forced landing is survivable. A stall/spin at 350 ft AGL is not.
Debrief — teaching points
Carburetor ice forms in conditions you would not expect.
The FAA icing probability chart shows 'serious icing at glide power' at temperatures between roughly 20°C and 30°C when relative humidity is high — exactly the Gulf Coast morning conditions at KBKV. You do not need visible ice, freezing temperatures, or IMC. Warm, moist air at reduced power is the classic carb-ice environment. The PA-28-161's Lycoming O-320 is carbureted; it has no fuel injection or alternate air system. Carburetor heat is the only tool.
The first symptom is subtle — a dropping tachometer and engine roughness.
In a fixed-pitch airplane like the PA-28-161, carburetor ice first shows as engine roughness and an unexplained RPM decrease. There is no dramatic power cut. Pilots who are not actively monitoring the tachometer miss the early warning. By the time the roughness is obvious, significant ice has accumulated. Scan the tachometer as part of your regular instrument scan, especially in conducive conditions.
Apply full carburetor heat — not partial — and expect an initial RPM drop.
When you apply carb heat to an iced carburetor, the RPM will drop further before it rises. This is expected and normal: the heat is melting ice and the resulting water is briefly disrupting combustion. Do not remove carb heat when the RPM drops — that is the heat working. Hold it full on. The RPM will recover as the ice clears, typically within 15–30 seconds depending on ice accumulation. Partial carb heat can worsen the situation by partially melting ice into water ingestion without fully clearing the restriction.
An uncoordinated turn at low altitude with reduced power is a stall/spin setup.
The Warrior's semi-tapered wing is forgiving in normal flight, but in an uncoordinated turn at low altitude with reduced power, it is unforgiving. The airplane can stall in a bank even at above-stall airspeed if the turn is uncoordinated (ball out of center, slip or skid). If you find yourself in a low-altitude turn with a rough engine, level the wings immediately, lower the nose to regain airspeed, and center the ball. Do not try to tighten the turn or pull back to climb. The stall/spin is the killer.
Best glide is 73 KIAS in the PA-28-161 — use it immediately.
Best glide speed for the PA-28-161 is 73 KIAS. This speed maximizes glide distance and gives the most time and distance to manage the emergency. At 350 ft AGL with a rough engine, establishing 73 KIAS immediately maximizes your options — whether that means reaching the airport or setting up the best possible forced landing. Do not try to climb or maintain altitude; descend at best glide speed.
The off-field environment off Runway 09 at KBKV is good — open land and pasture.
The off-field environment off Runway 09's departure end (heading 090°) is open developed land, pasture, and hay fields — good forced-landing terrain. An engine failure on the Runway 09 climb-out is survivable if you maintain airspeed, avoid an uncoordinated turn, and execute a controlled forced landing. Doors should be unlatched before touchdown, master off just before impact, and flaps used for the slowest possible touchdown speed (impact energy rises with the square of speed). A controlled forced landing is survivable; a stall/spin is not.
Proactive carb heat use in conducive conditions is not optional.
The PA-28-161 POH and the FAA Pilot's Handbook of Aeronautical Knowledge both recommend applying carburetor heat when conditions are conducive to icing — before the symptom appears. In a Gulf Coast summer departure, with OAT near 26°C and dew point near 21°C, that means applying carb heat during the run-up check (and confirming the expected RPM drop, then recovery) and considering its use during climb in visible moisture or high humidity. Waiting for the roughness to appear at 350 ft AGL is waiting too long.
Built from the real accident record
Scenario built from NTSB LAX03LA238 (2003 PA-28-161 carburetor ice / stall on go-around), CHI05LA226 (2005 PA-28-161 magneto failure / stall during climb, fatal), and CEN12FA188 (2012 PA-28-161 stall during takeoff, fatal). Localized to Brooksville–Tampa Bay Regional Airport (KBKV).
NTSB reports: LAX03LA238 · CHI05LA226 · CEN12FA188
ACS tasks: PA.I.F — Weather Information · PA.I.G — Cross-Country Flight Planning · PA.II.A — Preflight Inspection · PA.II.B — Engine Starting / Systems Preflight · PA.III.A — Normal Takeoff and Climb · PA.III.C — Soft-Field Takeoff and Climb · PA.IX.C — Emergency Approach and Landing · PA.I.H — Human Factors
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.
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