Unstable and Committed
A destabilized approach to a short runway, a go-around decision delayed, and the DA40's energy management on the climb-out — decision-making under pressure at Peter O Knight
The scenario
Departing Peter O Knight Airport (KTPF), Tampa, FL — Runway 22 (true heading 217°), inbound on a VFR approach. Elevation 8 ft MSL. The runway is 3,583 ft long — adequate for a DA40 under normal conditions, but short enough that approach stability and energy management matter.
It is a hot, humid Tampa afternoon in late July: OAT 32°C, dew point 26°C, altimeter 29.89. Density altitude is approximately 2,100 ft — the airplane will perform as if it is 2,100 ft higher than field elevation. Scattered clouds at 3,500 ft, visibility 10 SM. Winds are 200° at 12 knots, gusting to 18 — a crosswind on Runway 22 of roughly 8–10 knots steady, with gusts to 15 knots. Within limits for the DA40, but crosswind management will be required.
You are a commercial pilot with roughly 800 hours total, 120 hours in the DA40. You are conducting a local instructional flight with a CFI in the right seat (safety pilot / observer). This is a 'student teaching' scenario — you are the PIC; the CFI is present to debrief, not to intervene unless safety is immediately threatened.
You are on a 3-mile final for Runway 22. Altitude 800 ft AGL, airspeed 90 KIAS (slightly fast for approach), descent rate 400 fpm (steep). The approach is not stabilized: you are high on the glideslope, the descent is steeper than ideal, and the crosswind is pushing you left of the runway centerline. You have not yet reduced power to approach setting, and you have not yet extended flaps. The runway is ahead.
Aircraft: Diamond DA40, solo + CFI, within weight and balance limits. Constant-speed prop, fuel-injected Lycoming IO-360, fixed gear, G1000 glass panel. Fuel selector is set to RIGHT (you switched from LEFT on downwind — a normal procedure in the DA40, where LEFT/RIGHT fuel management is required). Full fuel.
The CFI is watching silently. The decision to stabilize, continue, or go around is yours.
- {'label': 'Field', 'value': 'KTPF · Peter O Knight'}
- {'label': 'Runways', 'value': '4/22 · 18/36'}
- {'label': 'Elevation', 'value': '8 ft'}
- {'label': 'Aircraft', 'value': 'DA40'}
- {'label': 'Dominant phase', 'value': 'Landing / Approach'}
The decision
Before we get into the decision tree — what do you know about go-around decision-making in the DA40 and high-density altitude? (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 late (at or below 200 ft AGL), then decided to abort the go-around and land on the remaining runway. The airplane ran out of runway, veered off the pavement, 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 lost directional control in the crosswind, and the airplane collided with the 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. The pilot delayed the go-around decision and the aircraft floated. When the pilot finally initiated the go-around, the airplane was at low altitude and the high-density altitude reduced climb performance. The airplane stalled. 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.
Peter O Knight Airport (KTPF) is a non-towered, Class G field with short runways (3,583 ft on Runway 22, 2,687 ft on Runway 18). The field's dominant accident pattern is FORCED_LANDING (19.4%), LOSS_OF_CONTROL_INFLIGHT (16.7%), and DITCHING (11.1%). The off-field environment off Runway 22's departure end (heading 217°) is open water — Tampa Bay. An engine-out go-around off that runway end is a ditching, not a field landing. This is not hypothetical; it is the USGS NLCD ground cover off that runway end.
The real accidents cited above occurred at other airports and in other DA40s — NOT at Peter O Knight Airport. KTPF has its own accident history, but these specific events happened elsewhere. The scenario is localized to KTPF to make the off-field environment and runway length real and consequential for you as a student here.
The consistent thread across all these events: go-around decision-making in the DA40 is time-critical and altitude-critical. A delayed go-around decision at low altitude in high-density altitude conditions leaves the airplane with insufficient performance to climb safely. A go-around initiated late (below 200 ft AGL) leaves insufficient runway to abort and land. The decision window is narrow. The rule is simple: if the approach is not stabilized by 500 ft AGL, go around. Do not continue, do not adjust, do not commit. Go around.
Key lesson — In the DA40, a stabilized approach by 500 ft AGL is not optional — it is the gate. High-density altitude reduces climb performance; a short runway (3,583 ft) reduces margin; crosswind conditions reduce directional control. If you are high, fast, not aligned, or steep by 500 ft AGL, initiate a go-around immediately. A go-around at 500 ft AGL is safe and recoverable. A go-around at 200 ft AGL or below is marginal. A continuation of an unstable approach risks a landing excursion, a stall on go-around, or worse. Off Runway 22 at KTPF, the off-field environment is open water — a loss of control on go-around is a ditching.
Debrief — teaching points
The 500 ft AGL stabilized approach gate is non-negotiable.
By 500 ft AGL, the approach must be stabilized: on a 3° glideslope, on speed (70 KIAS approach speed for the DA40), aligned with the runway, and configured (flaps at approach setting, prop at high RPM, power at approach setting). If any of these criteria are not met by 500 ft AGL, the correct decision is a go-around. A go-around at 500 ft AGL is safe, recoverable, and leaves ample runway to climb out. A continuation of an unstable approach risks a landing excursion, a stall, or a collision with terrain or obstacles. The 500 ft AGL gate is the decision point — not a suggestion.
High-density altitude reduces the DA40's climb performance significantly.
At 2,100 ft density altitude (common on a hot Tampa afternoon), the DA40's rate of climb is reduced by roughly 30–40% compared to sea-level performance. A go-around initiated at low altitude in high-density altitude conditions leaves the airplane with marginal climb performance. If the go-around is delayed until 200 ft AGL or below, the airplane may not have sufficient performance to clear obstacles or climb to a safe altitude. The decision to go around must be made early — at 500 ft AGL or above — to ensure adequate climb performance.
Crosswind landing technique requires active directional control and moderate braking.
In crosswind conditions (8–10 knots steady, gusting to 15), the airplane will want to drift downwind during the landing rollout. Maintain runway heading with active rudder and crosswind correction (crabbing or forward slip as appropriate). Apply moderate brakes — hard braking in a crosswind can cause the airplane to veer off the runway because the downwind wheel is lightly loaded. The DA40 has good braking, but crosswind technique is essential. If you feel the airplane veering, ease off the brakes and maintain directional control with rudder.
The DA40's fuel selector has no BOTH position — LEFT/RIGHT management is required.
The DA40 fuel selector is LEFT / RIGHT / OFF — there is no BOTH position. This means the pilot must actively manage fuel tank selection. A mis-set fuel selector (selecting an empty tank) or a failure to switch tanks during a go-around can result in fuel starvation. During a go-around, confirm the fuel selector is set to the tank with fuel (typically the tank you were using on approach). Do not assume; verify.
A go-around in the DA40 requires full power, high RPM, and a shallow climb at Vy.
When you initiate a go-around, advance the throttle to full power, set the prop control to high RPM (2,700 RPM), and reduce flaps to approach setting (not full up — you will retract them gradually as you climb). Establish a climb at 66 KIAS (Vy, best rate of climb). Do not attempt to climb at a higher airspeed or a lower airspeed; Vy is the speed that gives the best climb performance in the DA40. In high-density altitude, this climb performance is reduced, so the early go-around decision is critical.
Off Runway 22 at KTPF, the off-field environment is open water — a loss of control on go-around is a ditching.
The off-field environment off Runway 22's departure end (heading 217°) is open water — Tampa Bay. If a go-around is initiated and the airplane loses control, stalls, or cannot climb, the outcome is a ditching in the bay, not a field landing. This is not a worst-case scenario; it is the geographic reality. A stabilized approach and an early go-around decision (if needed) are the only ways to avoid this outcome. Know this before you line up on Runway 22.
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 loss of control), and GAA19CA431 (2019 DA40 stall during go-around in high-density altitude). Anonymized and localized to KTPF.
NTSB reports: GAA19CA582 · GAA19CA409 · GAA19CA431
ACS tasks: PA.II.D — Approach and Landing · PA.II.E — Go-Around / Rejected Landing · PA.III.A — Aeronautical Decision-Making · PA.I.F — Weather Information · PA.II.A — Preflight Preparation
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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