Power Loss on the Climb-Out
Partial engine failure in a Piper Warrior at low altitude — carburetor ice, magneto trouble, or fuel starvation. The decision to continue or land happens in seconds.
The scenario
Departing Lakeland Linder International Airport (KLAL), Lakeland, FL — Runway 10, climbing out on a 090° heading. Elevation 142 ft MSL; the runway is essentially at sea level. You are a Private pilot with roughly 250 hours total, current and proficient. This is a local VFR flight in a Piper Warrior PA-28-161.
It is a warm Florida afternoon in late spring: OAT 27°C, dew point 21°C, altimeter 29.92. Scattered clouds at 2,500 ft, light rain showers visible to the north. Visibility 8 SM. The conditions are classic for carburetor icing in a carbureted Lycoming O-320 — warm, moist air at reduced power is the FAA's serious-icing environment.
You are 400 ft AGL, climbing through 79 KIAS (Vy, best rate of climb), heading 090°, when the engine begins to run rough. The tachometer is unwinding — power is noticeably down. The off-field environment ahead (to the east, heading 090°) is a mix of low-density development, open developed areas (parks and large lots), and some dense development farther out. The airport is behind you. KLAL's tower is open 24 hours; you are in Class D airspace (ceiling 2,600 ft MSL).
Aircraft: Piper Warrior PA-28-161, 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. 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.
Pilot: You — a Private pilot, current, roughly 250 hours total. You have not flown the Warrior in three weeks. You did not brief the fuel selector position with yourself before takeoff. The left tank was full; the right tank was full. You selected LEFT without thinking about it.
- {'label': 'Field', 'value': 'KLAL · Lakeland Linder'}
- {'label': 'Runways', 'value': '5/23 · 10/28'}
- {'label': 'Elevation', 'value': '142 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 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 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 proactively.
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 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 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 and 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 KLAL makes the Runway 10 departure particularly unforgiving: the off-field environment ahead (heading 090°) is low-density development, open areas, and parks — good forced-landing options. However, the Warrior's best glide of 73 KIAS and the low altitude at which power loss occurs (400–600 ft AGL) leave little time for decision-making. The real accidents cited above occurred at other airports and in other contexts — NOT at Lakeland Linder International Airport. KLAL has its own accident history (see field dominant patterns: LOSS_OF_CONTROL_INFLIGHT 23.7%, LOSS_OF_CONTROL_GROUND 19.4%, FORCED_LANDING 17.2%), but these specific NTSB events happened elsewhere.
The consistent thread across all these events: partial engine power loss in the Piper Warrior can result from carburetor icing (most common in warm, moist conditions), magneto failure (from maintenance defects), fuel contamination (from improper tank management), or mechanical failure. The fix depends on the cause — but the immediate response is always the same: establish best glide (73 KIAS), address the most likely cause (carb heat first in icing conditions, fuel selector check second), and make a land/continue decision within 30 seconds. Delay is fatal.
Key lesson — In warm, moist Florida air, the Warrior'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 on the departure, the decision window is measured in seconds — not minutes. Off Runway 10 at KLAL, the off-field environment is low-density development and open areas — good forced-landing options exist, but only if you make the decision early and fly best glide (73 KIAS) to maximize distance and control.
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 Florida afternoon conditions at KLAL. You do not need visible ice, freezing temperatures, or IMC. Warm, moist air at reduced power is the classic carb-ice environment. The Warrior's Lycoming O-320 is carbureted; it has no fuel injection or 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 fuel selector is LEFT / RIGHT with no BOTH position — tank management is your job.
Unlike a Cessna with a BOTH position, the Warrior requires you to actively manage fuel selection. Fuel starvation from not switching tanks is a real failure mode in the Warrior. If you suspect fuel contamination or tank imbalance, switch tanks immediately. But do not forget to switch back — running one tank dry while the other is full is a preventable accident. Brief yourself on fuel selector position before every takeoff.
At KLAL Runway 10, an engine failure on departure has good off-field options.
The off-field environment off Runway 10's departure end (heading 090°) is low-density development, open developed areas (parks and large lots), and some dense development farther out. This is not water or mountains — it is survivable terrain. A forced landing in low-density development or a park is far better than a stall/spin trying to turn back to the runway at 400 ft AGL. Best glide is 73 KIAS. Flaps for slowest possible touchdown speed. Survival rates in controlled forced landings are significantly better than in uncontrolled ones.
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 Florida 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 400 ft AGL is waiting too long.
Built from the real accident record
Scenario built from NTSB CEN12LA175 (2012 PA-28-161 carburetor ice / power loss), LAX03LA238 (2003 PA-28-161 carb ice / go-around stall), 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), CHI08LA197 (2008 PA-28-161 power loss / overrun), IAD05LA133 (2005 PA-28-161 total engine failure / overhaul interval), and DEN03LA139 (2003 PA-28-161 performance planning failure). Anonymized and localized to KLAL.
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.C — Takeoff and 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.
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