Power Loss on the Climb-Out
Partial engine failure in a Piper Warrior — carburetor ice, tank starvation, or magneto trouble? The decision to continue or land must be made in seconds.
The scenario
Departing Sarasota Bradenton International Airport (KSRQ), Runway 04, climbing out on a 038° heading into a warm, humid Florida morning. Elevation 30 ft MSL; the runway is essentially at sea level. It is late spring: OAT 26°C, dew point 21°C, altimeter 29.94. Scattered clouds at 2,500 ft, light rain shower visible to the south. Visibility 8 SM. Classic Gulf Coast conditions — warm, moist air and reduced visibility. The FAA icing probability chart marks this as 'serious icing at glide power, moderate icing at cruise power.'
You are 350 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 unwinding. The off-field environment ahead (northeast of the runway) is marginal: mostly medium development, wooded wetland, and low-density development. KSRQ's tower is part-time (0600–0000 local) and is open; you are in Class C airspace.
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 (you switched from RIGHT after takeoff per procedure). 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 focused on the climb and the engine sounded normal until now.
- {'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 engine failure and carburetor ice in the PA-28-161? (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. 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 proactively.
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 and maintain airspeed during the aborted landing.
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 pilot stalled. The probable cause was partial magneto failure caused by improper maintenance, with contributing factors including the instructor's failure to maintain airspeed and follow emergency procedures.
NTSB ERA14LA141 (2014): A Piper PA-28-161 experienced partial engine power loss during takeoff from Atlantic City International Airport. The pilot executed a forced landing to the airport perimeter road. The probable cause was a partial loss of engine power for reasons that could not be determined during postaccident examination or engine test run.
The local environment at KSRQ makes this scenario consequential: Runway 04's departure end (heading 038°) is marginal terrain — mostly medium development, wooded wetland, and low-density development. An engine failure on the Runway 04 departure at low altitude is a forced landing, not a return to the airport. Runway 22's departure end (heading 218°) is open water and low-density development — a ditching. There is no 'easy' runway to depart from at KSRQ if the engine fails early.
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%, HARD_LANDING 11.5%, LOSS_OF_CONTROL_INFLIGHT 11.5%), but these specific 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 marginal terrain or water, the decision window is measured in seconds — not minutes. Off Runway 04 at KSRQ, the off-field environment is marginal; off Runway 22, it is open water. There is no 'safe' runway to depart from if the engine fails early. Early recognition and immediate action are the entire lesson.
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 carbureted Lycoming O-320 has no fuel injection and no alternate air system. Carburetor heat is the only tool. Scan the tachometer as part of your regular instrument scan, especially in conducive conditions.
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. At 350 ft AGL on the climb-out, you have seconds to diagnose and act. Complacency — 'the engine ran fine during run-up, so it will be fine now' — is the killer.
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 Cessnas with a BOTH position, the Piper Warrior requires active fuel selector management. Starvation from not switching tanks is a real failure mode in the PA-28-161. You switched to LEFT after takeoff per procedure — that is correct. But if the LEFT tank were contaminated or the pickup blocked, you would need to switch to RIGHT. Know your fuel system. Know which tank you are on. Know the procedure for switching. A fuel starvation event at 350 ft AGL on the climb-out is fatal.
At KSRQ, both runway departures have consequential off-field environments.
Off Runway 04 (heading 038°), the off-field environment is marginal — mostly medium development, wooded wetland, and low-density development. A forced landing there is possible but difficult. Off Runway 22 (heading 218°), the off-field environment is open water and low-density development — a ditching. There is no 'safe' runway to depart from if the engine fails early. This is not hypothetical; it is the NLCD ground cover off those runway ends. Know your off-field environment before you line up on the runway.
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 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 on the climb-out 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), WPR10FA264 (2010 PA-28-161 in-flight fire / maintenance failure), CHI08LA197 (2008 PA-28-161 power loss / overweight), IAD05LA133 (2005 PA-28-161 mechanical failure / overhaul interval), and DEN03LA139 (2003 PA-28-161 performance planning failure). Localized to KSRQ.
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.II.B — Engine Starting / Systems Preflight · PA.IX.C — Emergency Approach and Landing · PA.I.H — Human Factors
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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