Engine Failure Over Tampa Bay
Total power loss at 400 ft AGL departing a water-surrounded field — ditching decision and execution in a C172M
The scenario
Departing Albert Whitted Airport (KSPG), St. Petersburg, FL — Runway 07, climbing out on a 062° heading over Tampa Bay. Elevation 7 ft MSL. It is a calm, clear morning; visibility 10 SM, OAT 22°C, altimeter 30.01. Winds calm. A textbook VFR day.
You are a Private pilot with roughly 250 hours total, current and proficient. You are flying a Cessna 172M — the carbureted, 150-hp variant with fixed gear and fixed-pitch prop. The airplane is within limits, full fuel, solo. The preflight was thorough; nothing was written up. The engine ran smoothly on the ground.
You line up on Runway 07, advance the throttle to full power, and rotate at 55 KIAS. The airplane climbs smoothly. At 400 ft AGL, heading 062°, climbing at 78 KIAS (Vy, best rate of climb), the engine suddenly loses ALL power. The tachometer drops to zero. No sputtering, no cough — total, immediate loss. You have roughly 30 seconds of useful altitude and a critical decision to make.
Off the Runway 07 departure end (heading 062°), the off-field environment is open water — Tampa Bay. There is no alternate landing surface ahead. Behind you is the airport, but you are 400 ft AGL, airspeed 78 KIAS, and the engine is dead. The 'impossible turn' back to Runway 25 (heading 242°) is a known trap: at 400 ft AGL with a dead engine, a 180° turn back to the departure runway is marginal at best and often ends in a stall/spin.
KSPG tower is part-time, open 0700–2100 local. You are in Class D airspace. The tower is aware of your departure. You are alone in the airplane. You have no time for lengthy deliberation. What do you do?
- {'label': 'Field', 'value': 'KSPG · Albert Whitted'}
- {'label': 'Runways', 'value': '7/25 · 18/36'}
- {'label': 'Elevation', 'value': '7 ft'}
- {'label': 'Aircraft', 'value': 'C172M'}
- {'label': 'Dominant phase', 'value': 'Landing / Takeoff'}
The decision
Before the decision tree — what do you know about ditching in a C172M? (Pick all that apply; this records your baseline.)
What the record shows
What the NTSB files show
NTSB ERA15LA091 (2014): A Cessna 172M experienced total loss of engine power during cruise flight at 10,500 feet over the Atlantic Ocean and was ditched in the ocean about 5 miles from the nearest land mass. The accident resulted from total loss of engine power for reasons that could not be determined, as examination of the engine revealed no anomalies that would have precluded normal operation. The pilot executed a controlled ditching and survived.
NTSB ERA11LA429 (2011): A Cessna 172M experienced partial engine power loss during takeoff and made a controlled ditching in Lake Okeechobee after the pilot was unable to land on the intended runway. The accident resulted from separation of the No. 3 cylinder exhaust valve head. Contributing factor: the operator's exceedence of the engine manufacturer's recommended time between overhauls. The pilot's misjudgment of the airplane's position and airspeed relative to the runway during the return to the airport contributed to the accident.
NTSB ANC08LA007 (2007): A float-equipped Cessna 172M nosed over during a water landing on Rangeley Lake when the pilot's attention was diverted by military helicopters operating in close proximity to the landing area. The accident resulted from the pilot's failure to maintain aircraft control during the landing flare/touchdown, with diverted attention as a contributing factor. The lesson: maintain focus on the landing itself; external distractions can be fatal.
NTSB IAD02LA003 (2001): A Cessna 172M on a fish spotting flight over the Chesapeake Bay near White Stone, Virginia lost engine power at 2,500 feet and ditched in 50-foot deep water. The cause of the engine power loss could not be determined. The pilot survived the ditching.
NTSB LAX89LA222 (1989, FATAL): A Grumman AA-1C stalled on final approach over coastal water in gusting crosswind conditions and impacted the ocean short of the runway. The accident resulted from the pilot's failure to maintain sufficient airspeed to prevent a stall at an altitude too low for recovery. The mechanism — low altitude, low airspeed, steep turn, stall/spin — is the fatal outcome of the impossible turn trap.
NTSB ERA10CA300 (2010): A Piper PA-18-135 stalled and entered a spin during a climbing right turn on final approach when the pilot attempted to perform a 360-degree turn per ATC spacing request. The accident was attributed to the pilot's failure to maintain adequate airspeed during the climbing turn. The lesson: prioritize airspeed maintenance over ATC requests; recognize when a maneuver exceeds aircraft capability.
NTSB ATL92LA146 (1992): A Cessna 172D stalled 15 feet above ground during short final approach and crashed short of the runway surface. The accident resulted from the pilot's failure to maintain flying speed during final approach. The lesson: maintain flying speed throughout final approach; recognize stall warning signs early and execute go-around if airspeed decays below safe margin.
All of these real accidents occurred at other locations — NOT at Albert Whitted Airport (KSPG). However, KSPG's own accident history shows a dominant pattern of LOSS_OF_CONTROL_INFLIGHT (20%), FORCED_LANDING (16.4%), and DITCHING (12.7%) — the same mechanisms. The scenario is localized to KSPG to make the off-field environment real and consequential: Runway 07's departure end is open water. An engine failure on the Runway 07 departure at low altitude is a ditching, not a field landing.
The consistent thread across all these events: at low altitude with a dead engine, the impossible turn back to the departure runway is a known trap. The turn requires altitude, airspeed, and coordination you are marginal on. Stall/spin risk is high. The safer, more survivable outcome is a controlled ditching — when you have time to prepare. Commit to the ditching early, when altitude allows you to complete the pre-impact checklist (doors unlatched, master off, flaps for slowest touchdown speed). The slowest possible touchdown speed is the priority — impact energy rises with the square of speed.
Key lesson — Total engine failure at 400 ft AGL over water is a ditching scenario. The impossible turn back to the departure runway is a known accident trap — stall/spin risk is high at low altitude with a dead engine. The correct decision is to establish 65 KIAS best glide immediately, commit to a controlled ditching, and complete the pre-impact checklist (doors unlatched, emergency declared, flaps extended, master off just before impact). The slowest possible touchdown speed minimizes impact energy. Controlled ditchings are survivable; stall/spin outcomes are not.
Debrief — teaching points
The impossible turn at 400 ft AGL is a fatal trap.
NTSB data and accident analysis show that a 180° turn back to the departure runway at 400 ft AGL with a dead engine is marginal at best and often ends in a stall/spin. The turn requires altitude, airspeed, and coordination you are stretched thin on. At 400 ft AGL, you are descending at roughly 500 fpm; a 180° turn takes 30–40 seconds and costs 250–330 ft of altitude. You will be at 70–150 ft AGL when the turn is complete — too low to recover from a stall. The safer outcome is a controlled ditching, when you have time to prepare.
Establish 65 KIAS best glide immediately after engine failure.
The C172M's best glide speed is 65 KIAS at gross weight. This speed maximizes glide distance and gives you the most time and distance to manage the emergency. At 65 KIAS, the C172M glides roughly 1.3 nm per 1,000 ft of altitude. At 400 ft AGL, you have roughly 2 minutes of glide time and 1.3 nm of distance. Lower the nose immediately to 65 KIAS; do not try to maintain altitude or climb.
Commit to the ditching early, when you have time to prepare.
A controlled ditching requires time to complete the pre-impact checklist: doors unlatched, emergency declared, flaps extended, master off just before impact. If you wait until 100 ft AGL to commit, you have no time for preparation. Commit at 400 ft AGL or 300 ft AGL, when you have 60–90 seconds of glide time remaining. This gives you time to unlatch the doors, declare the emergency, extend flaps, and turn off the master switch before water contact.
Doors unlatched before water contact — they will open on impact.
Unlatch both the pilot and passenger doors before water contact. On impact, the doors will open, allowing you to exit the cabin. If the doors are latched, they may jam on impact and trap you inside. Unlatch them early, while you have altitude and attention to spare — at 350 ft AGL, not 50 ft AGL.
Master switch OFF just before water contact — prevent electrical fire.
Turn the master switch off just before water contact (roughly 15–20 ft above the surface). This de-energizes the electrical system and prevents post-impact electrical fire or fuel pump operation. Turning it off early (at 350 ft AGL) is also acceptable — it gives you more time to focus on the final approach. But do not skip this item.
Full flaps on final approach to water — slowest possible touchdown speed.
Extend full flaps (40°) on final approach to the water. The C172M's max flap speed is 87 KIAS; you are at 65 KIAS, well within limits. Full flaps increase drag and slow the airplane further. At 65 KIAS + full flaps, your touchdown speed will be roughly 50 KIAS. Impact energy rises with the square of speed — the slowest possible touchdown speed is the priority in a ditching. This is more important than the steepness of the approach.
Built from the real accident record
Scenario built from NTSB ERA15LA091 (2014 C172M total power loss over Atlantic, ditching), ERA11LA429 (2011 C172M partial power loss / controlled ditching Lake Okeechobee), ANC08LA007 (2007 C172M water landing control loss), and IAD02LA003 (2001 C172M power loss over Chesapeake Bay). Regional precedents LAX89LA222 (1989 AA-1C stall on final over ocean), ERA10CA300 (2010 PA-18 spin on final), ATL92LA146 (1992 C172D stall on final). Real events occurred at other locations — NOT at KSPG.
NTSB reports: ERA15LA091 · ERA11LA429 · ANC08LA007 · IAD02LA003 · LAX89LA222 · ERA10CA300 · ATL92LA146
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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