Rough Climb Over Sarasota Bay
Carburetor ice, partial power loss, and a low-altitude decision over water — the Warrior's forgiving wing won't save you from a delayed response
The scenario
Departing Sarasota Bradenton International Airport (KSRQ), Runway 04, climbing out over Sarasota Bay on a 038° heading. Elevation 30 ft MSL; the runway is essentially at sea level. KSRQ is Class C airspace (ceiling 4,000 MSL), towered part-time (0600–0000 local). Tower is open; you are in Class C.
It is a hazy Florida afternoon in late spring: OAT 29°C, dew point 23°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.' The Piper Warrior's carbureted Lycoming O-320 is particularly susceptible in these conditions.
You are 450 ft AGL, climbing through 79 KIAS (Vy, best rate of climb), heading 038°, when the engine begins to run rough. Power is noticeably down — the tachometer is dropping. Sarasota Bay fills the windscreen ahead. The tower is aware of your departure; you are in Class C and radar-identified.
Aircraft: Piper PA-28-161 Warrior, solo, full fuel (48 gallons usable), 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 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 monitoring the fuel selector (LEFT tank, as briefed).
- {'label': 'Field', 'value': 'KSRQ · Sarasota Bradenton'}
- {'label': 'Runways', 'value': '4/22 · 14/32'}
- {'label': 'Elevation', 'value': '30 ft'}
- {'label': 'Aircraft', 'value': 'PA-28-161'}
- {'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 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 experienced progressive engine power loss due to carburetor icing during climb through 6,500 feet. The probable cause was carburetor icing in conditions conducive to serious icing, with a contributing factor of limited carburetor heat valve travel from recent maintenance. The pilot did not apply carburetor heat early enough to prevent significant ice accumulation.
NTSB LAX03LA238 (2003): A Piper PA-28-161 experienced partial engine power loss during initial climb 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 probable cause was carburetor icing and the pilot's failure to use carburetor heat. The secondary failure was the pilot's inability to maintain airspeed during the aborted landing — a stall at low altitude is fatal.
NTSB CEN09CA532 (2009): A Piper PA-28-161 on a personal return-to-airport flight lost engine power during descent due to carburetor icing one mile from the airport. The pilot made a forced landing in a corn field and sustained a broken arm. The probable cause was the pilot's failure to apply carburetor heat in icing-conducive conditions. The pilot survived because he committed to a forced landing rather than trying to stretch the glide to the runway.
NTSB ATL04LA124 (2004): A Piper PA-28-161 on a personal flight lost engine power during climb in conditions favorable for carburetor ice formation. The pilot made a forced landing on a beach. The probable cause was the pilot's failure to use carburetor heat when weather conditions were favorable for carburetor ice formation.
NTSB NYC03LA012 (2002): A Piper PA-28-161 student pilot on a solo instructional flight lost engine power near Lakewood, New Jersey, due to carburetor ice. The probable cause was the pilot's improper use of carburetor heat — the pilot applied heat but did not leave it on long enough or fully on, allowing ice to reform. A contributing factor was the carburetor icing conditions.
The local environment at KSRQ makes this scenario particularly unforgiving: Runway 04's departure end is marginal off-field (medium development, wooded wetland) — not ideal, but better than open water. However, an engine failure on the Runway 04 departure at low altitude over Sarasota Bay is still a forced landing in marginal terrain or a ditching. There is no open field, no road, no park. The water and development are 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 Sarasota Bradenton International Airport. KSRQ has its own accident history (see field dominant patterns: LOSS_OF_CONTROL_GROUND 19.2%, FORCED_LANDING 15.4%, RUNWAY_EXCURSION 11.5%), but these specific carburetor ice events happened elsewhere. The scenario is localized to KSRQ 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.
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 over Sarasota Bay, the decision window is measured in seconds — not minutes. Off Runway 04 at KSRQ, the off-field environment is marginal at best and open water at worst: a delayed response means a forced landing in difficult terrain or a ditching, not a safe field landing. The Warrior's forgiving wing and docile handling are assets, but they do not excuse the delay in applying carb heat.
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 KSRQ. 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 and no alternate air system. Carburetor heat is the only tool. The Warrior's docile wing and forgiving handling do not protect you from carb ice — they just make the recovery easier if you apply heat early.
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. At 450 ft AGL over water, a 10-second delay in recognizing the symptom can be fatal.
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. NTSB NYC03LA012 shows the danger of improper carb heat use — the pilot applied heat but did not leave it on long enough.
At KSRQ Runway 04, an engine failure on departure is a forced landing or ditching.
The off-field environment off Runway 04's departure end (heading 038°) is marginal at best: medium development, wooded wetland, and open water. 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 forced landing in difficult terrain or a ditching. This is not a worst-case scenario; it is the geographic reality. Best glide is 73 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 04.
The Warrior's fuel selector is LEFT / RIGHT with NO BOTH position — tank management is your job.
The PA-28-161 has a fuel selector with three positions: LEFT, RIGHT, and OFF. There is no BOTH position. This means you must actively switch tanks during flight to balance fuel and prevent starvation. Fuel starvation from forgetting to switch tanks is a Piper-class accident. In this scenario, you were on the LEFT tank at departure — a normal choice. But if you had been on the RIGHT tank and the LEFT tank had been contaminated, switching to the LEFT tank would have made the problem worse. Know your fuel selector position at all times and understand which tank you are feeding from. The rough engine in this scenario was carb ice, not fuel contamination, but the discipline of fuel management is non-negotiable in the Warrior.
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 29°C and dew point near 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 450 ft AGL over Sarasota Bay is waiting too long. The NTSB CEN12LA175 pilot did not apply carb heat early enough; the result was progressive power loss during climb.
Built from the real accident record
Scenario built from NTSB CEN12LA175 (2012 PA-28-161 carburetor ice / power loss during climb), LAX03LA238 (2003 PA-28-161 carb ice / stall on go-around), CEN09CA532 (2009 PA-28-161 carb ice / forced landing), ATL04LA124 (2004 PA-28-161 carb ice / beach landing), and NYC03LA012 (2002 PA-28-161 improper carb heat use). Regional precedents GAA17CA105, ERA17CA149, GAA16CA149 inform crosswind/control-loss factors at KSRQ. Anonymized and localized to KSRQ.
NTSB reports: CEN12LA175 · LAX03LA238 · CEN09CA532 · ATL04LA124 · NYC03LA012 · GAA17CA105 · ERA17CA149 · GAA16CA149
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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