Rough Climb Over Tampa Development
Partial engine power loss on initial climb from a towered field — no good forced-landing site ahead
The scenario
Departing Tampa International Airport (KTPA), Tampa, FL — Runway 10, initial climb on a 092° heading. Field elevation 26 ft MSL. You are in Class B airspace (ceiling 10,000 ft MSL); tower is active 24 hours.
It is a warm Florida morning in late July: OAT 31°C, dew point 24°C, altimeter 29.89. Scattered clouds at 3,500 ft, visibility 10 SM. High humidity, high density altitude — the Continental O-200 in your C150M will climb slowly. The runway is long (6,999 ft), but the climb-out environment off Runway 10 (heading 092°) is dense development, parks, and wooded wetland. No open fields. No roads suitable for a forced landing. Dense Tampa suburbs.
You are 300 ft AGL, climbing through 68 KIAS (Vy, best rate of climb), heading 092°, when the engine begins to run rough. The tachometer is dropping. Power is noticeably down. You have roughly 20–30 seconds of useful decision time before altitude becomes critical. The airport is behind you. Dense development is ahead and below.
Aircraft: Cessna 150M, solo, full fuel (26 gal usable), within limits. Continental O-200-A, carbureted, fixed-pitch prop, steam panel, fuel selector on BOTH. The airplane was airworthy at departure; nothing was written 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 tower handoff. You are not familiar with KTPA; this is your second flight here.
- {'label': 'Field', 'value': 'KTPA · Tampa'}
- {'label': 'Runways', 'value': '10/28 · 19L/01R · 19R/01L'}
- {'label': 'Elevation', 'value': '26 ft'}
- {'label': 'Aircraft', 'value': 'C150'}
- {'label': 'Dominant phase', 'value': 'Landing / Takeoff'}
The decision
Before we get into the decision tree — what do you already know about engine roughness and power loss in the C150M on initial climb? (Pick all that apply; this records your baseline.)
What the record shows
What the NTSB files show
NTSB CEN23FA401 (2023): A Cessna 150K on an instructional flight experienced partial engine power loss due to fuel system blockage. The flight instructor failed to maintain adequate airspeed after the power loss, and the airplane exceeded its critical angle of attack and entered an aerodynamic stall at low altitude. The accident was fatal. The probable cause was fuel starvation caused by a fuel system blockage and the flight instructor's failure to maintain adequate airspeed.
NTSB CEN23FA077 (2023): A Cessna 150H on an instructional flight conducted a night visual approach to a non-towered airport in dark conditions with no cultural lighting. The flight instructor failed to apply carburetor heat, and the aircraft experienced engine power loss due to carburetor icing. The airplane descended below safe altitude and impacted a farm field 1.2 miles short of the runway. The accident was fatal.
NTSB WPR09FA326 (2009): A Cessna 150 on a personal flight from Lake Tahoe Airport entered a spin seconds after takeoff at approximately 100 feet AGL due to partial loss of engine power from a malfunctioning carburetor. The pilot failed to maintain adequate airspeed while maneuvering to return to the runway. High density altitude was a contributing factor. The accident was fatal.
NTSB CHI92DER01 (1992): A Goehring Quickie homebuilt aircraft lost engine power during initial climb after a touch-and-go landing due to carburetor ice. The pilot attempted to stretch the glide over congested residential terrain and made a forced landing in a residential area after descending through trees and a house. The accident resulted from lack of suitable terrain for forced landing as a contributing factor.
NTSB CHI89DEM10 (1989): A Fletcher Sonerai-2L homebuilt aircraft lost engine power during initial climb due to improper maintenance (loose cylinder head from recent valve replacement). The pilot failed to commit to a forced landing decision early and attempted to maneuver over unsuitable terrain, resulting in a crash in trees. The accident was fatal.
The real accidents cited above occurred at other airports and in other aircraft — NOT at Tampa International Airport. KTPA has its own accident history (see field dominant patterns: forced landing 22.2%, loss of control inflight 11.1%), 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: engine failure or partial power loss on initial climb over unsuitable terrain is survivable only if the pilot recognizes the problem early, applies the correct corrective action (carburetor heat for icing, mixture adjustment for starvation), and commits to the best available forced-landing site if power cannot be restored. The C150M's marginal climb performance — especially at high density altitude and in warm, humid conditions — means that every second counts. Off Runway 10 at KTPA, the climb-out environment is dense development: parks, buildings, trees, power lines. There is no open field. A forced landing there is into obstacles, not a field landing. The decision window is measured in seconds, not minutes.
Key lesson — In warm, humid Gulf Coast air at high density altitude, the C150M's carbureted Continental O-200 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 unsuitable terrain, the decision window is measured in seconds — not minutes. Off Runway 10 at KTPA, the climb-out environment is dense development: commit to a forced landing in the best available site (park, open area) rather than attempting to stretch the glide over buildings and trees.
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 15°C and 25°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 (like initial climb at Vy = 68 KIAS) is the classic carb-ice environment. The C150M's Continental O-200 is carbureted; it has no fuel injection, 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 C150M, 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. On initial climb, your scan should include: airspeed (68 KIAS Vy), altitude, heading, and tachometer.
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 KTPA Runway 10, an engine failure on departure is a forced landing in development.
The off-field environment off Runway 10's climb-out (heading 092°) is dense development, parks, and wooded wetland. There is no open field, no road, no suitable alternate landing surface. 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 the best available site — likely a park with trees on the perimeter, or a large open area. This is not a worst-case scenario; it is the geographic reality. Best glide is 60 KIAS. 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 10.
Proactive carb heat use in conducive conditions is not optional.
The C150M 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 30°C and dew point near 24°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 300 ft AGL over Tampa development is waiting too long.
Built from the real accident record
Scenario built from NTSB CEN23FA401 (2023 C150K fuel starvation / stall), CEN23FA077 (2023 C150H carburetor ice / night approach), CEN17FA281 (2017 C150F engine roughness over water), WPR09FA326 (2009 C150 partial power loss / high density altitude), and regional precedents MIA91LA128, CHI92DER01, CHI92DEM03, CHI89DEM10. Anonymized and localized to KTPA.
NTSB reports: CEN23FA401 · CEN23FA077 · CEN17FA281 · WPR09FA326 · MIA91LA128 · CHI92DER01 · CHI92DEM03 · CHI89DEM10
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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