Power Loss on Climb-Out
Partial engine failure in a Piper Cherokee 180 — carburetor ice, fuel starvation, or maintenance? The decision tree is tight.
The scenario
Departing Zephyrhills Municipal Airport (KZPH), Zephyrhills, FL — Runway 19, climbing out on a 180° heading. Elevation 90 ft MSL; the runway is essentially at sea level in central Florida.
It is a hazy Florida afternoon in late spring: OAT 27°C, dew point 21°C, altimeter 29.92. Scattered clouds at 2,500 ft, light rain shower two miles to the east. Visibility 8 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 Piper Cherokee 180's carbureted Lycoming O-360 is susceptible to carburetor ice in these conditions.
You are 400 ft AGL, climbing through 74 KIAS (Vy), heading 180°, when the engine begins to run rough. Power is noticeably down — the tachometer is dropping. The off-field environment off Runway 19 is marginal: mostly open developed areas (parks/large lots), evergreen forest, and low-density development — workable for a forced landing, but not ideal.
Aircraft: Piper Cherokee 180, solo, fuel tanks checked and full (both tanks), within limits. Carbureted Lycoming O-360, fixed-pitch prop, steam panel, fuel selector on LEFT tank (you switched to LEFT after takeoff). Nothing was written up; the airplane was airworthy at departure.
Pilot: you — a Private pilot, current, roughly 200 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 fine at first.
- {'label': 'Field', 'value': 'KZPH · Zephyrhills'}
- {'label': 'Runways', 'value': '19/1 · 5/23'}
- {'label': 'Elevation', 'value': '90 ft'}
- {'label': 'Aircraft', 'value': 'PA-28-180'}
- {'label': 'Dominant phase', 'value': 'Landing / Cruise'}
The decision
Before we get into the decision tree — what do you already know about the Piper Cherokee 180's fuel system and engine failure modes? (Pick all that apply; this records your baseline.)
What the record shows
What the NTSB files show
NTSB DEN07CA035 (2006): A Piper PA-28-180 on a personal flight lost engine power on base leg due to carburetor icing. The pilot made a forced landing attempt on a road, swerved to avoid car lights, and struck a tree, resulting in substantial damage. The probable cause was carburetor icing in conditions conducive to serious icing, with contributing factors including unsuitable terrain and the tree obstacle. The pilot had not applied carburetor heat proactively.
NTSB ATL03LA148 (2003): A Piper PA-28 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 when weather conditions were favorable for carburetor icing.
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 connection. Night conditions were a contributing factor.
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 real accidents cited above occurred at other airports and in other aircraft — NOT at Zephyrhills Municipal Airport. KZPH has its own accident history (forced landing, loss of control in flight, and stall/spin are the dominant patterns), but these specific PA-28-180 events happened elsewhere. The scenario is localized to KZPH 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 PA-28-180 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 PA-28-180's LEFT / RIGHT fuel selector (no BOTH position) is a starvation trap: the pilot must actively switch tanks, and running a selected tank dry is a classic failure mode.
Key lesson — In warm, moist Florida air, the PA-28-180'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, the decision window is measured in seconds — not minutes. Off Runway 19 at KZPH, the off-field environment is marginal but workable; off Runway 1, it is good. Know your fuel selector position (LEFT or RIGHT — never assume BOTH), and switch tanks proactively during cruise to avoid starvation. A delayed response to engine roughness at 400 ft AGL means a forced landing, not a comfortable return to the airport.
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 Florida afternoon conditions at KZPH. You do not need visible ice, freezing temperatures, or IMC. Warm, moist air at reduced power is the classic carb-ice environment. The PA-28-180's Lycoming O-360 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-28-180, 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.
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.
The PA-28-180 has LEFT / RIGHT fuel selector — no BOTH position. Know where your fuel is.
The PA-28-180's fuel system has two tanks (left and right wing) and a selector with three positions: LEFT, RIGHT, and OFF. There is no BOTH position. The pilot must actively switch tanks during flight to avoid starvation. Running a selected tank dry is a classic failure mode — the engine will quit, and switching to the other tank may not restore power immediately. Before takeoff, verify both tanks are full. During cruise, switch tanks every 30 minutes or per the POH. On approach, select the tank with the most fuel. Never take off on a near-empty tank.
At KZPH, the off-field environment varies by runway.
Off Runway 19's departure end (heading 180°), the off-field environment is marginal: mostly open developed areas (parks/large lots), evergreen forest, and low-density development — workable for a forced landing, but not ideal. Off Runway 1's departure end (heading 360°), the off-field environment is good: mostly pasture/hay, open developed areas, and evergreen forest — better options. If you experience an engine failure on the Runway 19 departure, you have workable terrain ahead. If you experience an engine failure on the Runway 1 departure, you have even better terrain. Know the off-field environment before you line up on the runway.
Proactive carb heat use in conducive conditions is not optional.
The PA-28-180 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 Florida summer departure, with OAT near 27°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 400 ft AGL 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 failure to apply heat), NYC03LA096 (2003 PA-28-180 loose fuel line post-maintenance), and ANC25LA094 (2025 PA-28-180 engine malfunction on climb-out). Anonymized and localized to KZPH.
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
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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