Destabilized Approach, Go-Around Decision
A slippery DA40 floats on short final; the go-around window closes fast. Density altitude and runway length force a critical decision.
The scenario
Departing Zephyrhills Municipal Airport (KZPH), Zephyrhills, FL — Runway 19, landing after a local instructional flight. Elevation 90 ft MSL. You are a commercial pilot, 800 hours total, with 120 hours in the DA40. Your instructor is in the right seat for a check-ride prep session.
It is a hot, humid Florida afternoon in late July: OAT 34°C, dew point 26°C, altimeter 29.89. Density altitude is approximately 2,100 ft — well above field elevation. Runway 19 is 5,072 ft long, ASP (asphalt). A 12-knot wind from 160° is a 10-knot crosswind on Runway 19 (true heading 180°). Visibility 10 SM, scattered clouds at 3,500 ft. Classic Florida summer conditions — hot, sticky, and density altitude is a real factor.
You are on a 3-mile final for Runway 19, 1,200 ft AGL, at 90 KIAS (approach speed is 70 KIAS, but you are still at approach descent speed). The DA40 is a slippery airplane — it floats in ground effect if you do not actively manage energy. You have not yet reduced power or extended flaps. Your descent rate is shallow. The runway is ahead.
Aircraft: Diamond DA40, solo (instructor observing), full fuel, within limits. Lycoming IO-360-M1A, fuel-injected, constant-speed prop, fixed gear, G1000 glass. Fuel selector is on LEFT tank. Nothing was written up; the airplane is airworthy.
Pilot: you — a commercial pilot, current, 800 hours total, 120 hours DA40. You have done 40 landings in this airplane. Your crosswind experience is solid. But this approach is not stable: you are high, fast, and the runway is getting closer. The decision to continue or go around is imminent.
- {'label': 'Field', 'value': 'KZPH · Zephyrhills'}
- {'label': 'Runways', 'value': '19/1 · 5/23'}
- {'label': 'Elevation', 'value': '90 ft'}
- {'label': 'Aircraft', 'value': 'DA40'}
- {'label': 'Dominant phase', 'value': 'Landing / Cruise'}
The decision
Before we get into the decision tree — what do you know about the DA40's approach and go-around characteristics? (Pick all that apply; this records your baseline.)
What the record shows
What the NTSB files show
NTSB GAA19CA582 (2019): A Diamond DA40 on an instructional flight experienced a loss of control during an aborted go-around when the pilot cut power and applied brakes with insufficient runway remaining. The pilot initiated a go-around at approximately 200 ft AGL, then aborted it and attempted to land on the remaining runway. The DA40 was unable to stop within the available distance, skidded off the runway, and struck a concrete barrier. The probable cause was the pilot's decision to abort a go-around with insufficient runway remaining to safely stop the airplane.
NTSB GAA19CA409 (2019): A Diamond DA40 on an instructional flight drifted left of the runway during landing in crosswind conditions and struck a runway edge light during a go-around. The pilot receiving instruction failed to maintain runway heading and bank control in crosswind conditions. The go-around was initiated, but the airplane drifted left and struck the edge light. The probable cause was the pilot's failure to maintain runway heading and bank control during landing in crosswind conditions.
NTSB GAA19CA431 (2019): A Diamond DA40 stalled during a go-around attempt on a short grass runway in high-density altitude conditions after the pilot delayed the go-around decision and the aircraft floated. The pilot maintained a steep pitch attitude during the go-around, but the airplane was too heavy in the thin air to accelerate. The airspeed decayed, the airplane stalled, and the left wing dropped. The probable cause was the pilot's delayed decision to go around in high-temperature and high-density altitude conditions and his exceedance of the airplane's critical angle of attack.
All three accidents involved DA40s in instructional or check-ride-prep flights. All three involved go-around decisions made too late or executed incorrectly. The common thread: the DA40 is a slippery, efficient airplane that floats in ground effect if energy is not actively managed. A destabilized approach at low altitude in high-density altitude conditions is a trap — the go-around decision must be made early, when altitude and energy are available.
At Zephyrhills Municipal Airport (KZPH), the off-field environment off Runway 19's departure end is marginal — mostly open developed (parks/large lots), evergreen forest, and low-density development. An off-field landing there is survivable but the airplane will be damaged. The runway is 5,072 ft long — adequate for normal operations, but in high-density altitude conditions (2,100 ft DA on a hot summer day), the effective runway length is compressed. A go-around abort at 200 ft AGL leaves marginal runway remaining.
The real accidents cited above occurred at other airports and in other instructional contexts — NOT at KZPH. The scenario is localized to KZPH to make the density altitude, runway length, and off-field environment real and consequential for you as a commercial pilot training here.
The consistent lesson across all three NTSB cases: the go-around decision must be made early — at 500+ ft AGL, when altitude and energy are available. A destabilized approach in high-density altitude conditions is not a landing problem; it is a go-around problem. The DA40's slippery airframe and high wing loading make it unforgiving of late corrections.
Key lesson — In high-density altitude conditions at KZPH, the DA40 is heavy and the runway is effectively shorter. A destabilized approach (high, fast, shallow descent) at 3 miles final is a go-around trigger, not a landing problem. The go-around decision must be made early — at 500+ ft AGL, when you have altitude and energy to climb cleanly. Aborting a go-around below 300 ft AGL is a trap: the runway remaining is marginal and the abort itself becomes the accident. Floating in ground effect at low altitude is the DA40's signature trap — active energy management on approach prevents it.
Debrief — teaching points
The DA40 is slippery — it floats in ground effect if you do not actively manage energy.
The DA40's composite airframe and efficient wing design make it a high-performance airplane. But on approach, this efficiency is a trap: the airplane floats in ground effect if you do not actively manage descent rate and airspeed. An approach that is high and fast at 3 miles final will still be high and fast at 1 mile final if you do not correct it. The correction must be aggressive: reduce power, extend flaps, and steepen the descent. If you cannot stabilize the approach by 500 ft AGL, go around. Floating at 300 ft AGL and trying to correct with aggressive flaps and power reduction is a trap — you are out of time and out of margin.
Vref is 70 KIAS on short final — anything above that is unstable.
The DA40's approach speed (Vref) is 70 KIAS. On short final (500 ft AGL and below), you should be at or below 70 KIAS. If you are at 80+ KIAS at 500 ft AGL, the approach is unstable and you need to correct immediately or go around. The DA40 floats — it does not descend at the rate you expect if you are above Vref. Plan your descent rate and power reduction to reach Vref by 1 mile final, not at the runway threshold.
High-density altitude compresses both the runway and the climb-out performance.
At 2,100 ft density altitude on a hot summer day at KZPH, the DA40 needs more runway to stop and more runway to climb out. Runway 19 is 5,072 ft long — adequate in standard conditions, but effectively shorter in high-density altitude. A go-around abort at 200 ft AGL leaves marginal runway remaining. The DA40 is slippery and does not stop quickly. Plan your approach and go-around decisions with density altitude in mind: go around early, when you have altitude and energy.
The go-around decision must be made early — at 500+ ft AGL, when altitude and energy are available.
A go-around initiated at 500 ft AGL is clean: full power, pitch up, retract flaps, climb. A go-around initiated at 200 ft AGL is marginal: you have little altitude to work with, and aborting the go-around to land on the remaining runway is a trap. If the approach is unstable at 500 ft AGL, go around. If you are still correcting the approach at 300 ft AGL, go around. The go-around is not a failure — it is airmanship. The failure is delaying the decision until you are out of altitude and out of margin.
Aborting a go-around below 300 ft AGL is a trap — the runway remaining is marginal.
Once you have initiated a go-around and are climbing, aborting it to land on the remaining runway is a dangerous decision. At 200 ft AGL, the runway remaining is marginal — especially in high-density altitude conditions. The DA40 is slippery and does not stop quickly. If you have initiated a go-around, commit to it: full power, climb to a safe altitude, and re-enter for another approach. Aborting the go-around is the accident.
In high-density altitude, a go-around requires a shallow pitch attitude and acceptance of a lower initial climb rate.
In high-density altitude conditions (2,100 ft DA), the DA40 is heavy and the air is thin. A go-around requires full power and a shallow pitch attitude — not a steep climb. The airplane will climb as it accelerates. If you pitch too steeply, the airspeed will decay and you will approach the stall. At 450 ft AGL with an airspeed of 55 KIAS, you are below Vs0 (49 KIAS landing stall) and approaching a stall. Lower the pitch attitude, accept a shallow climb, and let the airplane accelerate. Aggressive pitch in thin air is a stall trap.
The fuel selector on the DA40 is LEFT / RIGHT — not BOTH — and a mis-set tank can cause fuel starvation on go-around.
The DA40's fuel selector has LEFT / RIGHT positions (no BOTH). A mis-set fuel selector or an empty selected tank can cause fuel starvation, especially on go-around when the engine is at full power and fuel demand is high. Before every approach, confirm the fuel selector is on the fullest tank. On go-around, the engine is at full power — if the selected tank is empty or nearly empty, the engine will lose power. This is a trap. Manage the fuel selector actively: switch tanks as needed to keep the fullest tank selected, especially on approach.
Built from the real accident record
Scenario built from NTSB GAA19CA582 (2019 DA40 go-around abort with insufficient runway), GAA19CA409 (2019 DA40 crosswind go-around / runway excursion), and GAA19CA431 (2019 DA40 stall during go-around in high-density altitude). Anonymized and localized to KZPH.
NTSB reports: GAA19CA582 · GAA19CA409 · GAA19CA431
ACS tasks: PA.II.D — Approach and Landing · PA.II.E — Go-Around / Rejected Landing · PA.I.F — Weather Information · PA.I.H — Human Factors · PA.IX.C — Emergency Approach and Landing
Relevant FARs: §91.3 · §91.13 · §91.103
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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