Rough Climb Over Tampa Development
Carburetor ice in a Piper Cherokee 180, low altitude, and no good off-field options — a decision made in seconds
The scenario
Departing Tampa North Aero Park Airport (X39), Tampa, FL — Runway 14, climbing out on a 141° heading. Elevation 68 ft MSL. You are a Private pilot with 280 hours total time, current and proficient in the Piper Cherokee 180. Solo flight, full fuel in both tanks, within weight and balance.
It is a humid 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 northeast. 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.'
You are 350 ft AGL, climbing through 74 KIAS (Vy, best rate of climb), heading 141°, when the engine begins to run rough. Power is noticeably down — the tachometer is dropping. The terrain ahead is medium development and low-density residential — no obvious landing surface. X39 is a non-towered field (CTAF); you are in Class G airspace, but the overlying Tampa Class B begins at 3,000 ft MSL.
Aircraft: Piper Cherokee 180, carbureted Lycoming O-360-A, fixed-pitch prop, steam panel, fuel selector on RIGHT tank (you switched to RIGHT after takeoff to balance fuel burn). Nothing was written up; the airplane was airworthy at departure.
Pilot: you — a Private pilot, current, 280 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 did not anticipate icing in these warm conditions. The POH recommends carburetor heat when conditions are conducive to icing — you did not follow that guidance.
- {'label': 'Field', 'value': 'X39 · Tampa North Aero Park'}
- {'label': 'Runways', 'value': '14/32'}
- {'label': 'Elevation', 'value': '68 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 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 pilot had not applied carburetor heat prior to takeoff, allowing ice to form in the induction system. The probable cause was the pilot's failure to use carburetor heat when weather conditions were favorable for carburetor icing.
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, with contributing factors including unsuitable terrain and the tree obstacle.
NTSB NYC02FA025 (2001, FATAL): A Piper PA-28-180 on a personal cross-country flight experienced engine failure due to carburetor icing and made a forced landing into trees near Mansfield, Ohio in darkness. The probable cause was the pilot's improper use of carburetor heat, with contributing factors including night conditions, trees, and the pilot's impairment from ingestion of an over-the-counter antihistamine.
The real accidents cited above occurred at other airports and in other regions — NOT at Tampa North Aero Park Airport (X39). The scenario is localized to X39 to make the off-field environment real and consequential for you as a student here. X39's own dominant accident pattern shows LOSS_OF_CONTROL_INFLIGHT (27.3%), LOSS_OF_CONTROL_GROUND (18.2%), and OBSTACLE_ON_TAKEOFF_LANDING (9.1%) — terrain and control challenges are the field's signature hazards.
The consistent thread across all these PA-28-180 events: carburetor ice 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.
The PA-28-180's carbureted Lycoming O-360-A has no fuel injection and no alternate air system. Carburetor heat is the only tool. In warm, moist Gulf Coast air, apply it proactively during the run-up and consider its use during climb in visible moisture or high humidity. Waiting for the roughness to appear at 350 ft AGL over development is waiting too long.
Key lesson — In warm, moist Gulf Coast air, the PA-28-180's carbureted O-360-A 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 developed terrain, the decision window is measured in seconds — not minutes. Off Runway 14 at X39, the off-field environment is medium development and low-density residential — no ideal landing surface. A delayed response means a forced landing in terrain, not a field landing.
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 afternoon conditions at X39. 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-A is carbureted; it has no fuel injection and no 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.
At X39 Runway 14, an engine failure on departure is a forced landing in developed terrain.
The off-field environment off Runway 14's departure end (heading 141°) is medium development and low-density residential — no ideal landing surface. There is no open field, no water, no park. If the engine quits on the Runway 14 departure and altitude is insufficient to return to the airport, the outcome is a forced landing in terrain. This is not a worst-case scenario; it is the geographic reality. Best glide is 65 KIAS. Doors unlatched before landing. 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 14.
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 Gulf Coast 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 350 ft AGL over development is waiting too long.
Built from the real accident record
Scenario built from NTSB DEN07CA035 (2006 PA-28-180 carburetor ice / forced landing), ATL03LA148 (2003 PA-28-180 carb ice on takeoff climb), NYC02FA025 (2001 PA-28-180 carb ice / forced landing, fatal), and localized to Tampa North Aero Park Airport (X39).
NTSB reports: DEN07CA035 · ATL03LA148 · NYC02FA025
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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