Power Loss on Climb-Out
Partial engine failure in a Piper Cherokee 180 — carburetor ice, fuel starvation, or maintenance trap? The decision window is seconds.
The scenario
Departing St. Petersburg Clearwater International Airport (KPIE), Pinellas Park, FL — Runway 04, climbing out on a 040° heading. Elevation 11 ft MSL; the runway is essentially at sea level. You are a Private pilot with 180 hours total time, current and proficient in the Piper Cherokee 180. This is a familiar home field.
It is a hazy Florida morning in late spring: OAT 26°C, dew point 21°C, altimeter 29.94. Scattered clouds at 2,800 ft, light rain shower two miles to the northeast. Visibility 7 SM. Classic Gulf Coast conditions — warm, moist, and exactly the environment the FAA icing probability chart marks as 'serious icing at glide power, moderate icing at cruise power.' The Lycoming O-360 carbureted engine is susceptible to ice formation in these conditions.
You are 350 ft AGL, climbing through 72 KIAS (near Vy of 74 KIAS), heading 040°, when the engine begins to run rough. Power is noticeably down — the tachometer is dropping. The water of Tampa Bay and open developed areas fill the windscreen ahead. KPIE's tower is open (0600–2300 local); you are in Class D airspace.
Aircraft: Piper Cherokee 180, solo, full fuel in both tanks, within limits. Carbureted Lycoming O-360, fixed-pitch prop, steam panel, fuel selector on LEFT tank (the tank you selected for takeoff). The airplane was airworthy at departure; the last 100-hour inspection was 8 hours ago.
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 heads-down on the climb and the engine sounded normal. You are now at 350 ft AGL with a rough engine and dropping power.
- {'label': 'Field', 'value': 'KPIE · St. Petersburg Clearwater'}
- {'label': 'Runways', 'value': '4/22 · 18/36'}
- {'label': 'Elevation', 'value': '11 ft'}
- {'label': 'Aircraft', 'value': 'PA-28-180'}
- {'label': 'Dominant phase', 'value': 'Takeoff / Landing'}
The decision
Before we get into the decision tree — what do you already know about engine failure and carburetor ice in the Piper Cherokee 180? (Pick all that apply; this records your baseline.)
What the record shows
What the NTSB files show
NTSB ATL03LA148 (2003): A Piper PA-28-180 on a personal flight experienced engine power loss during takeoff climb after extended ground operation in conditions favorable for carburetor icing. The probable cause was the pilot's failure to apply carburetor heat prior to takeoff, allowing ice to form in the induction system. The pilot had not applied carb heat during the run-up because the engine ran smoothly — a false signal of safety.
NTSB DEN07CA035 (2006): A Piper PA-28-180 on a personal flight lost engine power on base leg due to carburetor icing and made a forced landing attempt on a road. The pilot swerved to avoid car lights and struck a tree, resulting in substantial damage. The probable cause was loss of power due to carburetor icing in conditions conducive to serious icing. The unsuitable terrain (a road with obstacles) and the pilot's attempt to avoid obstacles rather than commit to a controlled landing were contributing factors.
NTSB NYC03LA096 (2003): A Piper PA-28-180 on an instructional flight experienced partial engine power loss on initial climb after takeoff and made a forced landing in a field. The probable cause was an inadequate 100-hour inspection by maintenance personnel, which resulted in a loose fuel line and loss of power. Night conditions were a contributing factor. This accident illustrates the signature Piper Cherokee starvation trap — but in this case, the cause was maintenance failure, not pilot fuel mismanagement.
NTSB ANC25LA094 (2025): A Piper PA-28-180 experienced partial engine power loss with vibration during climb-out following a low-altitude runway inspection pass and made a forced landing in terrain. The probable cause was engine malfunction that prevented continued climb. The low-altitude pass prior to departure may have contributed by introducing stress or debris into the engine system.
The local environment at KPIE makes the Runway 04 departure particularly unforgiving: the off-field environment off Runway 04's departure end (heading 040°) is open water — Tampa Bay — with open developed areas (parks, large lots). An engine failure on the Runway 04 departure at low altitude is a ditching, not a field landing. There is no open field, no road, no park suitable for a forced landing. The water is the off-field environment. This is not hypothetical; it is the NLCD ground cover off that runway end.
The real accidents cited above occurred at other airports and in other aircraft — NOT at KPIE. KPIE has its own accident history (see field dominant patterns: LOSS_OF_CONTROL_INFLIGHT 21.2%, LOSS_OF_CONTROL_GROUND 15.2%, STALL_SPIN 12.1%, GEAR_UP_LANDING 9.1%, OBSTACLE_ON_TAKEOFF_LANDING 9.1%), but these specific events happened elsewhere. The scenario is localized to KPIE to make the off-field environment real and consequential for you as a student here.
The consistent thread across all these events: carburetor ice in the Piper Cherokee 180 is insidious. It builds gradually, the first symptom is roughness and a dropping tachometer (not a dramatic power cut), and by the time it is obvious, it may be too late for a comfortable recovery. The fix — full carburetor heat, immediately, at the first sign of roughness in conducive conditions — is simple. The failure is always a delay. Additionally, the Piper Cherokee 180's LEFT/RIGHT fuel selector with no BOTH position is a starvation trap: the pilot must actively switch tanks, and complacency about fuel state or a loose fuel line (maintenance failure) can result in sudden starvation.
Key lesson — In warm, moist Gulf Coast air, the Piper Cherokee 180's carbureted Lycoming O-360 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 over water, the decision window is measured in seconds — not minutes. Off Runway 04 at KPIE, the off-field environment is Tampa Bay: a delayed response means a ditching, not a field landing. Additionally, the Piper Cherokee 180's fuel selector requires active tank management — there is no BOTH position. Fuel starvation from neglecting to switch tanks, or from a loose fuel line that maintenance failed to catch, is a signature failure mode in this type.
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 KPIE. You do not need visible ice, freezing temperatures, or IMC. Warm, moist air at reduced power is the classic carb-ice environment. The Piper Cherokee 180's Lycoming O-360 is carbureted; it has no fuel injection, no alternate air system. Carburetor heat is the only tool. The FAA Pilot's Handbook of Aeronautical Knowledge recommends applying carburetor heat proactively in conditions conducive to icing — before the symptom appears.
The first symptom is subtle — a dropping tachometer and engine roughness.
In a fixed-pitch airplane like the Piper Cherokee 180, 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. At 350 ft AGL on the departure, you have seconds to act — not minutes.
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.
At KPIE Runway 04, an engine failure on departure is a ditching.
The off-field environment off Runway 04's departure end (heading 040°) is open water — Tampa Bay — with open developed areas (parks, large lots). There is no alternate landing surface. If the engine quits on the Runway 04 departure and altitude is insufficient to return to the airport, the outcome is a ditching. This is not a worst-case scenario; it is the geographic reality. Best glide is 65 KIAS. Cabin door unlatched before water contact. Fuel selector OFF, mixture idle cutoff, master off just before impact. Flaps for slowest possible touchdown speed — impact energy rises with the square of touchdown speed, so the slowest possible speed matters most. Know this before you line up on Runway 04.
The Piper Cherokee 180 fuel selector is LEFT / RIGHT with NO BOTH position — active tank switching is required.
Unlike Cessnas with a BOTH position, the Piper Cherokee 180 requires the pilot to actively switch tanks. Running a selected tank dry — or taking off on a near-empty tank — is the signature starvation trap in this type. NTSB NYC03LA096 shows a loose fuel line (maintenance failure) causing starvation on climb-out. Before every flight, verify fuel quantity in both tanks, establish a tank-switching plan, and execute it. On a short local flight, you might stay on one tank; on a longer flight, switch every 15–20 minutes. A rough engine on climb-out could be carb ice — but it could also be fuel starvation from a neglected tank or a loose fuel line. Always consider both possibilities.
Proactive carb heat use in conducive conditions is not optional.
The Piper Cherokee 180 POH and the FAA Pilot's Handbook 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 over Tampa Bay is waiting too long.
Built from the real accident record
Scenario built from NTSB DEN07CA035 (2006 PA-28-180 carburetor ice on base leg), ATL03LA148 (2003 PA-28-180 carb ice on takeoff climb), NYC03LA096 (2003 PA-28-180 loose fuel line / inadequate inspection), and ANC25LA094 (2025 PA-28-180 partial power loss on climb-out). Anonymized and localized to KPIE.
NTSB reports: DEN07CA035 · ATL03LA148 · NYC03LA096 · ANC25LA094
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 · PA.II.D — Takeoff and Climb
Relevant FARs: §91.3 · §91.13 · §91.185 · §91.407
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 Piper Cherokee 180 scenarios · More scenarios at KPIE