Rough Climb Over Tampa Bay
Partial power loss on initial climb from Tampa Executive — carburetor ice, fuel management, and a low-altitude decision in a Piper Warrior
The scenario
Departing Tampa Executive Airport (KVDF), Tampa, FL — Runway 05, climbing out on a 042° heading. Elevation 22 ft MSL; the runway is essentially at sea level. You are in Class G airspace (non-towered, CTAF). The overlying Tampa Class B airspace begins at 3,000 ft MSL, 10 nm away.
It is a hazy Florida afternoon in late spring: OAT 29°C, dew point 23°C, altimeter 29.92. Scattered clouds at 2,800 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 79 KIAS (Vy), heading 042°, when the engine begins to run rough. Power is noticeably down — the tachometer is dropping. The terrain ahead is wooded wetland and pasture; off your left wing (north) is medium development. KVDF is a non-towered field; you are on CTAF 122.8.
Aircraft: Piper PA-28-161 Warrior, solo, full fuel, 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 heads-down on the climb and focused on the heading.
- {'label': 'Field', 'value': 'KVDF · Tampa Executive'}
- {'label': 'Runways', 'value': '5/23 · 18/36'}
- {'label': 'Elevation', 'value': '22 ft'}
- {'label': 'Aircraft', 'value': 'PA-28-161'}
- {'label': 'Dominant phase', 'value': 'Landing / Takeoff'}
The decision
Before we get into the decision tree — what do you already know about carburetor ice in the PA-28-161 Warrior? (Pick all that apply; this records your baseline.)
What the record shows
What the NTSB files show
NTSB CEN12LA175 (2012): A Piper PA-28-161 on an instrument instructional flight encountered carburetor ice during climb through 6,500 feet. The engine lost power progressively. A contributing factor was limited carburetor heat valve travel from recent maintenance — the heat valve could not open fully, preventing maximum heat application. The probable cause was carburetor icing in conditions conducive to serious icing.
NTSB LAX03LA238 (2003): A Piper PA-28-161 experienced partial engine power loss during initial climb from Torrance due to carburetor icing. During a go-around attempt, the pilot failed to maintain adequate airspeed, resulting in a stall and collision with power lines and terrain. The pilot had not applied carburetor heat and did not maintain airspeed — a double failure that turned a recoverable engine problem into a fatal stall.
NTSB CHI05LA226 (2005, FATAL): A Piper PA-28-161 on an instructional flight lost engine power due to partial left magneto failure during initial climb. The flight instructor failed to maintain airspeed and follow emergency procedures, resulting in a stall. The magneto failure was caused by improper maintenance. The accident was fatal.
NTSB ERA14LA141 (2014): A Piper PA-28-161 experienced partial engine power loss during takeoff from Atlantic City. The cause could not be determined during postaccident examination or engine test run. The pilot executed a forced landing to the airport perimeter road. The airplane was damaged; the pilot survived.
The local environment at KVDF makes this scenario consequential: Runway 05's departure end is wooded wetland and pasture — rough but survivable for a forced landing. Runway 36's departure end (opposite direction) is open water and medium development — a forced landing there is a ditching or a collision with structures. The runway you depart on matters. Off Runway 05 at 350 ft AGL, you have options; off Runway 36, you do not.
The real accidents cited above occurred at other airports and in other aircraft — NOT at Tampa Executive Airport. KVDF has its own accident history (see field dominant patterns: LOSS_OF_CONTROL_GROUND 18.4%, HARD_LANDING 18.4%, FORCED_LANDING 15.8%), but these specific NTSB events happened elsewhere. The scenario is localized to KVDF 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-28-161 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-28-161's LEFT / RIGHT fuel selector (no BOTH position) means tank management is the pilot's job — fuel starvation from not switching tanks is a real risk in this airplane.
Key lesson — In warm, moist Gulf Coast air, the PA-28-161's carbureted O-320-D 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 05 at KVDF, the off-field environment is wooded wetland and pasture — rough but survivable. Off Runway 36, it is open water and medium development — a forced landing there is a ditching or a collision. Know your runway and its off-field environment before you line up.
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 KVDF. 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-D is carbureted; it has no fuel injection, 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-28-161, 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.
The PA-28-161 has LEFT / RIGHT fuel selector with no BOTH position — tank management is your job.
Unlike some Cessnas, the Piper Warrior does not have a BOTH position on the fuel selector. You must actively switch between LEFT and RIGHT tanks to manage fuel balance and prevent starvation from a single-tank depletion. Forgetting to switch tanks is a Piper-class accident. Establish a tank-switching protocol (e.g., switch every 30 minutes or at specific waypoints) and follow it religiously. On this scenario's departure, you were on LEFT tank; if the engine had quit from fuel starvation rather than carb ice, switching to RIGHT would have been the recovery. Know which tank you are on at all times.
At KVDF Runway 05, an engine failure on departure is a forced landing in rough terrain; Runway 36 is a ditching.
The off-field environment off Runway 05's departure end (heading 042°) is wooded wetland and pasture — rough but survivable for a forced landing. The off-field environment off Runway 36's departure end (heading 360°) is open water and medium development — a forced landing there is a ditching or a collision with structures. This is not a worst-case scenario; it is the geographic reality. Best glide is 73 KIAS. Flaps for slowest possible touchdown speed — impact energy rises with the square of speed. Know which runway you are departing and what lies ahead before you line up.
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 28–30°C and dew point near 22–23°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 CEN12LA175 (2012 PA-28-161 carburetor ice during climb), LAX03LA238 (2003 PA-28-161 carb ice + stall on go-around), CHI05LA226 (2005 PA-28-161 magneto failure + stall), ERA14LA141 (2014 PA-28-161 partial power loss at takeoff), and local-environment precedents WPR10FA264, CHI08LA197, IAD05LA133, DEN03LA139. Anonymized and localized to KVDF.
NTSB reports: CEN12LA175 · LAX03LA238 · CHI05LA226 · ERA14LA141 · WPR10FA264 · CHI08LA197 · IAD05LA133 · DEN03LA139
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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