Fuel Selector Confusion on Climb-Out

A Piper Cherokee 180's fuel selector has no BOTH position — mismanagement on departure can mean engine failure at 500 ft AGL

Piper Cherokee 180 · Tampa Executive Airport (KVDF) · Private · Takeoff / Initial Climb

The scenario

• {'label': 'Field', 'value': 'KVDF · Tampa Executive'}
• {'label': 'Runways', 'value': '5/23 · 18/36'}
• {'label': 'Elevation', 'value': '22 ft'}
• {'label': 'Aircraft', 'value': 'PA-28-180'}
• {'label': 'Dominant phase', 'value': 'Landing / Takeoff'}

The decision

Before we get into the decision tree — what do you already know about the Piper Cherokee 180's fuel system? (Pick all that apply; this records your baseline.)

What the record shows

What the NTSB files show

Key lesson — The Piper Cherokee 180's fuel selector has LEFT / RIGHT / OFF — no BOTH position. The pilot must actively switch tanks every 30 minutes of flight time to balance fuel consumption and detect a starvation problem early. Fuel starvation from selector mismanagement (forgetting to switch, placing the selector in an intermediate position, or selecting a contaminated tank) is the signature failure mode of this airplane. At low altitude on departure, an engine failure due to fuel starvation is an emergency. Diagnose quickly: if the engine roughens on climb-out, check the selector position first, then switch tanks. If the engine recovers, return to the airport for a precautionary landing and maintenance inspection. Do not continue the flight on a single tank without understanding why the other tank failed.

Debrief — teaching points

The Piper Cherokee 180 has no BOTH position — you must actively switch tanks.

Unlike the Cessna 172, which has a BOTH position and draws from both tanks simultaneously, the Piper Cherokee 180's fuel selector has only LEFT / RIGHT / OFF. The pilot must actively switch tanks every 30 minutes of flight time to balance fuel consumption. Forgetting to switch tanks is the signature failure mode of this airplane. At takeoff, the selector is placed on LEFT (or RIGHT, depending on which tank you want to use first). As you climb out, you must remember to switch tanks on schedule — typically every 30 minutes. Failure to switch results in the selected tank running dry while the other tank has fuel, causing fuel starvation and engine failure.

Fuel starvation can also result from an intermediate selector position.

If the fuel selector is placed between LEFT and RIGHT (an intermediate position), neither tank feeds the engine properly. The result is fuel starvation even though both tanks have fuel. This can happen if the selector knob is not fully seated in the LEFT or RIGHT position, or if the pilot moves the selector too slowly and leaves it in an intermediate position. Always ensure the selector is fully seated in the LEFT or RIGHT position — not in between. NTSB CEN24LA189 and WPR24LA178 both involved intermediate selector positions.

Engine roughness on climb-out in the Cherokee is more likely fuel-system related than carburetor ice.

While carburetor ice can occur in the Cherokee's carbureted Lycoming O-360, engine roughness on climb-out is more commonly caused by fuel-system issues: a contaminated tank, a fuel-line problem, or a selector misposition. Carb heat is worth trying, but if it doesn't help, immediately check the fuel selector position and consider switching tanks. The left tank is more prone to contamination (water, sediment) because the fuel cap and vent are on the left wing; switching to the right tank often clears the problem.

At low altitude on departure, fuel starvation is an emergency.

At 600 ft AGL on climb-out, you have roughly 30 seconds of decision time before altitude becomes critical. If the engine roughens or loses power, diagnose quickly: check the selector position, apply carb heat if needed, and switch tanks if the selector is correct. If the engine recovers after switching tanks, you have two options: (1) return to the airport for a precautionary landing and maintenance inspection, or (2) continue the flight on the good tank only, accepting the endurance limitation. Option 1 is the safer, more conservative choice. Option 2 is workable only if you are confident in the good tank and your flight plan does not exceed the single-tank endurance.

Establish a fuel-switching discipline before every flight.

Before takeoff, decide which tank you will use first (typically LEFT) and set a timer or note the time. Every 30 minutes, switch to the other tank and note the time. This discipline serves two purposes: (1) it balances fuel consumption between the two tanks, and (2) it detects a fuel-system problem early — if one tank is contaminated or has a fuel-line issue, you will discover it at altitude where you have time to diagnose and return to the airport, not at 600 ft AGL on departure. The NTSB accidents involving fuel starvation almost always involved a pilot who did not switch tanks on schedule or who was distracted and forgot to switch.

Off Runway 05 at KVDF, the forced-landing environment is good — wooded wetland, pasture, and medium development.

If the engine fails on the Runway 05 departure and you cannot return to the airport, the off-field environment ahead is wooded wetland, pasture, and medium development — good forced-landing terrain. Establish 65 KIAS best glide, pick the best landing surface you can see (open pasture or a cleared area), and execute a controlled forced landing. Flaps for slowest possible touchdown speed, doors unlatched, master off before impact. Off Runway 36, the environment is medium development, wooded wetland, and open water — a ditching scenario. Know the off-field environment before you line up on the runway.

Built from the real accident record

Scenario built from NTSB DFW05FA028 (2004 PA-28-180 fuel starvation / night cross-country, fatal), CEN24LA191 (2024 PA-28-180 failure to switch tanks en route), CEN24LA189 (2024 PA-28-180 student selector misposition during descent), ERA24LA116 (2024 PA-28-180 student fuel mismanagement on approach), and WPR24LA178 (2024 PA-28 selector intermediate position starvation). Localized to Tampa Executive Airport (KVDF).

NTSB reports: NYC03LA096 · DFW05FA028 · MIA02FA144 · WPR24LA178 · CEN24LA191 · CEN24LA189 · ERA24LA116 · CEN24LA108

ACS tasks: PA.I.F — Weather Information · PA.I.G — Cross-Country Flight Planning · PA.II.B — Engine Starting / Systems Preflight · PA.II.D — Flight Controls · PA.IX.C — Emergency Approach and Landing

Relevant FARs: §91.3 · §91.13 · §91.185

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