Power Loss on the Climb-Out
Partial engine failure in a Piper Warrior over dense Tampa development — carburetor ice, magneto failure, or fuel starvation. The decision to continue or land happens in seconds.
The scenario
Departing Tampa International Airport (KTPA), Tampa, FL — Runway 10, climbing out on a 092° heading. Elevation 26 ft MSL; the runway is essentially at sea level. KTPA is a towered Class B airport (ATCT open 24/7), ceiling 10,000 ft MSL. You are in the Tampa Class B airspace.
It is a hazy Florida afternoon in late spring: OAT 29°C, dew point 23°C, altimeter 29.91. Scattered clouds at 2,500 ft, light rain shower visible 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 conditions that breed carburetor ice in a carbureted Lycoming.
You are 500 ft AGL, climbing through 79 KIAS (Vy, best rate of climb), heading 092°, when the engine begins to run rough. Power is noticeably down — the tachometer is dropping. The off-field environment ahead (heading 092° from Runway 10) is dense development, medium development, and scattered open lots — marginal for a forced landing, but not water. KTPA tower is aware of your departure; you are in Class B airspace and in two-way radio contact.
Aircraft: Piper PA-28-161 Warrior, solo, full fuel (36 gallons total, 18 per tank), within limits. Carbureted Lycoming O-320-D, fixed-pitch prop, steam panel, fuel selector currently on LEFT tank. Nothing was written up; the airplane was airworthy at departure. The left magneto was last checked during the annual inspection three months ago.
Pilot: you — a Private pilot, current, roughly 180 hours total, with 40 hours in Piper Warriors. 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 tower handoff. You are not instrument-rated; this is a VFR flight.
- {'label': 'Field', 'value': 'KTPA · Tampa'}
- {'label': 'Runways', 'value': '10/28 · 19L/01R · 19R/01L'}
- {'label': 'Elevation', 'value': '26 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 partial engine power loss 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 encountered carburetor ice at 6,500 feet in conditions conducive to serious icing. The probable cause was carburetor icing, with a contributing factor of limited carburetor heat valve travel from recent maintenance — the heat valve could not reach full travel, preventing maximum carb heat application. The pilot did not apply carburetor heat proactively.
NTSB LAX03LA238 (2003): A Piper PA-28-161 experienced partial engine power loss due to carburetor icing during initial climb from Torrance. 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; a contributing factor was the pilot's failure to maintain airspeed during the go-around.
NTSB CHI05LA226 (2005, FATAL): A Piper PA-28-161 on an instructional flight from Culver, Indiana, lost engine power due to left magneto failure during initial climb after takeoff and subsequently stalled. The probable cause was partial failure of the left magneto 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 could not be determined during postaccident examination or engine test run — the failure was transient. The pilot survived.
The real accidents cited above occurred at other airports and in other aircraft — NOT at Tampa International Airport. KTPA has its own accident history (dominant patterns: forced landing 22.2%, loss of control inflight 11.1%, loss of control ground 8.9%, wire strike 6.7%, gear-up landing 6.7%), but these specific events happened elsewhere. The scenario is localized to KTPA to make the off-field environment real and consequential for you as a student here.
The consistent thread across all these events: in the Piper Warrior, partial engine power loss in the climb is insidious. Carburetor ice, magneto failure, and fuel starvation all present similarly — engine roughness and a dropping tachometer. The first response should always be carburetor heat (full on, immediately), because carb ice is the most common and most recoverable cause. If carb heat does not fix it, then diagnose magnetos or fuel. But the delay in applying carb heat is the killer — at 500 ft AGL, you do not have time for a prolonged diagnostic. Apply carb heat first.
Off Runway 10 at KTPA, the off-field environment is dense development, medium development, and scattered open lots — marginal for a forced landing, but not water. A forced landing in that environment is survivable if you maintain airspeed (73 KIAS best glide), pick the best available surface (a park, a large open lot, or a road), and fly the airplane all the way to touchdown. The NTSB ERA14LA141 pilot who executed a forced landing to the airport perimeter road survived. The pilot who stalls trying to make the runway does not.
Key lesson — In warm, moist Gulf Coast air, the Piper Warrior's carbureted Lycoming 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 development, the decision window is measured in seconds — not minutes. If carb heat does not restore power, diagnose magnetos or fuel, but do not delay the carb heat application. Off Runway 10 at KTPA, the off-field environment is marginal but survivable — maintain airspeed, pick the best surface, and fly the airplane.
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 KTPA. You do not need visible ice, freezing temperatures, or IMC. Warm, moist air at reduced power is the classic carb-ice environment. The Piper Warrior's Lycoming O-320 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 Warrior, 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 Piper Warrior has LEFT / RIGHT fuel selector — no BOTH position. Tank management is your job.
Unlike a Cessna with a BOTH position, the Warrior's fuel selector is LEFT / RIGHT only. You must actively manage which tank you are drawing from. Fuel starvation from not switching tanks is a real failure mode in this airplane. During preflight, confirm both tanks are full and the selector is on the fullest tank. During cruise, switch tanks every 15–20 minutes to balance fuel and ensure both tanks are feeding. If you experience roughness and you have not switched tanks recently, switch to the other tank — it may be contaminated or the selector may be stuck.
Magneto failure also presents as roughness and power loss — but carb heat will not fix it.
A partial magneto failure (left or right mag failing) also causes engine roughness, power loss, and a dropping tachometer. It can be diagnosed by checking mag drop on the good mag — if the engine runs significantly better on one mag, the other mag is failing. Carb heat will not fix a mag failure. If carb heat does not restore power, check the magnetos. A mag failure at low altitude is serious; a precautionary landing or forced landing is likely.
At KTPA Runway 10, an engine failure on departure is a forced landing in development.
The off-field environment off Runway 10's departure end (heading 092°) is dense development, medium development, and scattered open lots — marginal but survivable. There is no water, no mountains. If the engine quits on the Runway 10 departure and altitude is insufficient to return to the airport, the outcome is a forced landing in that development. Best glide is 73 KIAS. Flaps for slowest possible touchdown speed — impact energy rises with the square of touchdown speed, so the slowest possible speed matters most. Pick the best available surface (a park, a large open lot, or a road). Know this before you line up on Runway 10.
Proactive carb heat use in conducive conditions is not optional.
The Warrior 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 28–29°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 500 ft AGL over Tampa development 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 / go-around stall), CHI05LA226 (2005 PA-28-161 magneto failure / stall, fatal), ERA14LA141 (2014 PA-28-161 partial power loss at takeoff), WPR10FA264 (2010 PA-28-161 in-flight fire), CHI08LA197 (2008 PA-28-161 power loss / overrun), IAD05LA133 (2005 PA-28-161 total engine failure), and DEN03LA139 (2003 PA-28-161 high-DA forced landing). Anonymized and localized to KTPA.
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 · PA.II.D — Takeoff and Departure Climb
Relevant FARs: §91.3 · §91.13 · §91.185 · §91.207
Step through the full decision tree, make the calls, and see where each choice leads — then debrief it with your CFI.
Open the interactive scenario →All sample scenarios · More Piper Warrior scenarios · More scenarios at KTPA