Rough Climb Over Central Florida
Carburetor ice, partial power loss, and a low-altitude decision — the Warrior's forgiving wing is no substitute for airmanship
The scenario
Departing Brooksville–Tampa Bay Regional Airport (KBKV), Brooksville, FL — Runway 09, climbing out on a 090° heading. Elevation 76 ft MSL; the runway is essentially at sea level. Off Runway 09's climb-out end (heading 090°), the off-field environment is mostly open developed areas (parks, large lots), pasture/hay, and medium development — good forced-landing terrain if needed.
It is a warm, humid Florida morning in late spring: OAT 26°C, dew point 21°C, altimeter 29.94. Scattered clouds at 3,000 ft, light rain shower two miles to the northeast. Visibility 9 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 are conducive to carburetor icing even though the temperature is well above freezing.
You are 500 ft AGL, climbing through 79 KIAS (Vy, best rate of climb), heading 090°, when the engine begins to run rough. Power is noticeably down — the tachometer is unwinding. The Warrior's low wing and forgiving handling are reassuring, but the engine is the problem, not the airframe. KBKV's tower is part-time (0700–2200) and is open; you are in Class D airspace.
Aircraft: Piper PA-28-161 Warrior, solo, 38 gallons usable 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. You completed a thorough preflight and run-up.
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 at full power on the runway.
- {'label': 'Field', 'value': 'KBKV · Brooksville–Tampa Bay'}
- {'label': 'Runways', 'value': '3/21 · 9/27'}
- {'label': 'Elevation', 'value': '76 ft'}
- {'label': 'Aircraft', 'value': 'PA-28-161'}
- {'label': 'Dominant phase', 'value': 'Landing / Cruise'}
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 lesson: even a well-maintained airplane can have a carburetor heat system with reduced travel — the pilot must apply it fully and monitor the response.
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. The secondary cause was the pilot's failure 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.
NTSB ATL04LA124 (2004): A Piper PA-28-161 on a personal flight lost engine power during climb in conditions favorable for carburetor ice formation, and 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 apply it fully or did not hold it on long enough for the ice to clear.
The consistent thread across all these PA-28-161 events: carburetor ice in warm, moist conditions 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 or incomplete application.
At KBKV, the off-field environment off Runway 09's climb-out end is open developed areas, pasture, and medium development — good forced-landing terrain. An engine failure on the Runway 09 departure at low altitude is survivable if the pilot commits to the forced landing early and flies it properly. The real accidents cited above occurred at other airports and in other regions — NOT at KBKV. KBKV's own dominant accident pattern is hard landings and forced landings, reflecting the challenges of the local environment and pilot decision-making.
Key lesson — In warm, moist Florida air, the Warrior's carbureted Lycoming 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 09 at KBKV, the off-field environment is open terrain: a delayed response means a forced landing, not a return to the airport. The Warrior's forgiving wing and docile handling are assets only if the pilot recognizes the problem early and acts decisively.
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 KBKV. 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-D 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.
At KBKV Runway 09, an engine failure on departure is a forced landing in open terrain.
The off-field environment off Runway 09's climb-out end (heading 090°) is open developed areas, pasture, and medium development — good forced-landing terrain. There is no water, no mountains, no impossible terrain. If the engine quits on the Runway 09 departure and altitude is insufficient to return to the airport, the outcome is a controlled forced landing. Best glide is 73 KIAS. Master off just before touchdown. 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 09.
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 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 500 ft AGL is waiting too long.
The Warrior's fuel selector is LEFT / RIGHT — not BOTH.
Unlike some high-wing Cessnas, the Warrior has no BOTH position. The fuel selector is LEFT / RIGHT only. Tank management is the pilot's job. In this scenario, you are on the LEFT tank. If you were to run that tank dry, you would have to switch to the RIGHT tank — and if you forgot, the engine would quit. Carburetor ice is not the only engine-failure risk in the Warrior; fuel starvation from tank mismanagement is equally real. Scan the fuel selector as part of your regular scan, and plan tank switches before departure.
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, ERA21LA119, GAA19CA170 (crosswind control loss). Anonymized and localized to KBKV.
NTSB reports: CEN12LA175 · LAX03LA238 · CEN09CA532 · ATL04LA124 · NYC03LA012 · GAA17CA105 · ERA21LA119 · GAA19CA170
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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