Dry Side
Fuel mismanagement in the DA40 — when the engine quits on approach and the selector is the answer
The scenario
Field: Brooksville–Tampa Bay Regional Airport (KBKV), Brooksville, FL. Elevation 76 ft MSL. You are returning from a 2.1-hour cross-country and are inbound to land Runway 09 — a 7,001-foot concrete runway, heading 090°. Tower is active (0700–2200 local); you are cleared for the visual approach.
Aircraft: Diamond DA40, solo, within limits. Lycoming IO-360-M1A fuel-injected engine, constant-speed prop, G1000 glass panel. Fuel selector is LEFT or RIGHT — there is no BOTH position.
Fuel state: You departed with full tanks (total 33.5 gal usable). You have been burning from the LEFT tank since engine start and have not switched. The G1000 fuel quantity display shows LEFT at approximately 2 gallons indicated, RIGHT still showing 14+ gallons. You are 4 miles out on final, gear fixed, flaps LDG, slowing through 90 KIAS toward your target Vref of 70 KIAS.
Pilot: Private certificate, 210 hours total, 80 in type. You've been heads-down managing the G1000 for the RNAV approach briefing and talking to tower. The fuel selector has been on LEFT since before departure. You did not switch tanks at the top of descent as your checklist calls for.
- {'label': 'Field', 'value': 'KBKV · Brooksville–Tampa Bay'}
- {'label': 'Runways', 'value': '3/21 · 9/27'}
- {'label': 'Elevation', 'value': '76 ft'}
- {'label': 'Aircraft', 'value': 'DA40'}
- {'label': 'Dominant phase', 'value': 'Landing / Cruise'}
The decision
You're on final, 4 miles out, and the engine is still running — for now. Before the scenario unfolds, which of these are in your head? (Pick all that apply — no wrong answers; this records your baseline awareness.)
What the record shows
What the NTSB files show
Fuel starvation — engine failure caused by an empty selected tank despite usable fuel in the other tank — is one of the most preventable accident causes in general aviation. The DA40's LEFT/RIGHT selector (no BOTH position) makes tank management an active, required pilot task on every flight.
NTSB case GAA19CA534 (Piper PA-28, 2019): A pilot switched to the left tank during descent, the engine lost power, and the pilot failed to switch back to the right tank containing usable fuel. Forced landing on a road. The DA40 scenario is mechanically identical — wrong tank selected, right tank full, engine silent.
NTSB case WPR12LA023 (Cessna 185, 2011, near Bend, Oregon): The pilot inadvertently left the fuel selector on the left tank during descent despite usable fuel in the right tank. Forced landing on an unpaved road; aircraft nosed over. The lesson: verify selector position before descent, not after the engine quits.
NTSB case ERA17LA205 (Cessna P206, 2017): Post-maintenance break-in flight, pilot ran the right tank dry during approach, engine quit, forced landing in trees short of the runway. The teaching angle: monitor fuel quantity and tank selection continuously during approach; never run a single tank to exhaustion.
NTSB case WPR24LA167 (Harvard MK IV, 2024): Improper fuel tank selection at low fuel levels combined with a malfunctioning selector caused total power loss and a forced landing that struck a dirt berm. The lesson: understand your fuel selector mechanics and the consequences of improper selection.
None of these accidents occurred at KBKV. They are presented here because the mechanism — fuel starvation from a mis-set or exhausted selected tank — is directly applicable to DA40 operations at any field, including Brooksville–Tampa Bay Regional.
The DA40 checklist requires a fuel selector check during the descent/approach flow. That one item — confirming the selector is on the fuller tank before descent — is the entire prevention. The engine does not know the difference between a mechanical failure and an empty selected tank. The pilot does.
Key lesson — In the DA40, the fuel selector is LEFT or RIGHT — there is no BOTH. Running one tank to exhaustion on approach is not a mechanical failure; it is a procedural failure. The immediate action for engine failure in the DA40 is: fuel selector to the other tank, boost pump ON, mixture RICH, best glide 73 KIAS. Do the checklist descent flow — every time.
Debrief — teaching points
The DA40 fuel selector has no BOTH — tank management is your job.
Unlike a Cessna 172 with a BOTH position, the DA40 requires the pilot to actively select LEFT or RIGHT. There is no passive, always-safe setting. If you depart on LEFT and never switch, you will eventually run the left tank dry — regardless of how much fuel is in the right tank. Establish a tank-switching discipline (e.g., switch every 30 minutes, or at top of descent) and stick to it on every flight.
Fuel starvation is not the same as fuel exhaustion — and it's more embarrassing.
Fuel exhaustion means you ran out of total fuel. Fuel starvation means the engine quit because the selected tank was empty while usable fuel sat in the other tank. Starvation is 100% preventable with one selector movement. The NTSB files are full of aircraft that landed short with fuel in the unselected tank. In the DA40, the G1000 fuel quantity display shows both tanks — check it, and cross-check it against your time/burn calculation.
Immediate action for engine failure: fuel selector, boost pump, mixture — then glide.
When the DA40 engine quits, the immediate action is: fuel selector to the other tank, boost pump ON, mixture FULL RICH. Simultaneously establish best glide at 73 KIAS. This sequence addresses the most common cause (starvation) while setting up the airplane for maximum glide range. Do not transmit, do not troubleshoot the G1000, do not pull back — switch the tank first. The radio call comes after the airplane is configured.
Best glide is 73 KIAS — not slower, not faster.
73 KIAS is the DA40's best glide speed at gross weight. Flying slower than 73 KIAS does not extend your glide — it steepens your descent path and reduces your range. The instinct to pull back when the engine quits is natural and wrong. Lower the nose to 73 KIAS immediately. At 800 ft AGL and 3 miles out, 73 KIAS gives you meaningful range to troubleshoot and reach the runway. Below 73 KIAS, you are trading range for the illusion of control.
The descent checklist exists for this exact moment — use it before you need it.
The DA40 descent/approach checklist includes a fuel selector verification. Running that checklist at top of descent — before workload spikes with approach briefings, radio calls, and traffic — is the single action that prevents this entire scenario. Checklist discipline is not bureaucratic; it is the difference between a normal landing and a forced landing in a pasture. The NTSB cases in this scenario all share one common thread: a pilot who did not verify fuel selector position before descent.
Built from the real accident record
Composite scenario built from NTSB cases WPR24LA167, GAA19CA534, WPR12LA023, and ERA17LA205 — fuel starvation events in single-engine piston aircraft. All real accidents occurred at other locations; none occurred at KBKV.
NTSB reports: WPR24LA167 · GAA19CA534 · WPR12LA023 · ERA17LA205
ACS tasks: PA.II.A — Pilot Qualifications and Currency · PA.II.B — Airworthiness Requirements · PA.IX.A — Emergency Descent / Loss of Control Awareness · PA.IX.C — Emergency Approach and Landing · PA.I.H — Human Factors
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 Diamond DA40 scenarios · More scenarios at KBKV