Engine Failure During Takeoff

16.engine-failure-takeoff. Engine Failure During Takeoff

An engine failure during the takeoff phase is one of the most time-critical emergencies a pilot will face. Because the airplane is low, slow, and configured for takeoff, decisions must be made and executed in seconds. The Airplane Flying Handbook divides this emergency into three distinct regimes — engine failure on the takeoff roll, engine failure immediately after lift-off, and engine failure during the initial climb — each demanding a different response.

Engine Failure During the Takeoff Roll

If the engine fails or loses power while still on the runway, the procedure is straightforward: abort the takeoff. The pilot should:

• Smoothly close the throttle
• Apply maximum braking consistent with directional control
• Retract flaps if doing so improves braking effectiveness (weight on wheels)
• Maintain runway centerline with rudder
• Shut down the engine, fuel, and master switch if there is time and the airplane will not stop on the remaining surface

The key consideration is the abort point — the position on the runway beyond which a safe stop on the remaining pavement is no longer possible. Pilots should mentally identify this point during the takeoff briefing.

Engine Failure Immediately After Lift-Off

This is the most demanding scenario. The airplane is airborne but at low altitude, low airspeed, and high pitch attitude. The instinctive reaction — to pull back and try to return to the runway — is almost always fatal because it leads to a stall/spin. The correct response is:

1. Lower the nose immediately to establish and maintain the manufacturer's recommended best-glide attitude (or at minimum, a positive flying airspeed above stall).
2. Land essentially straight ahead, accepting whatever terrain lies in the approximate ±30° cone off the nose.
3. Avoid steep turns. A turn back to the runway at low altitude bleeds energy rapidly and increases stall speed (stall speed increases by roughly 19% in a 45° bank, 41% in a 60° bank).
4. If altitude permits, perform the engine-failure flow: fuel selector, mixture, magnetos, primer, master — but only if it does not interfere with flying the airplane.
5. Before impact, secure the airplane: fuel off, mixture idle cutoff, mags off, master off, doors unlatched.

The FAA cautions against the so-called "impossible turn" — attempting to turn back to the departure runway following an engine failure shortly after takeoff. The minimum altitude required to complete a return is highly variable (typically 600–1,000 ft AGL or more depending on wind, airplane, and pilot proficiency) and the maneuver is unforgiving of errors. Unless the pilot has briefed a specific turnback altitude and practiced the maneuver, landing straight ahead is the correct decision.

Engine Failure During Initial Climb

Once the airplane has reached a safe maneuvering altitude — generally well above pattern altitude — the pilot has more options. The procedure is:

1. Establish best-glide airspeed (V_G) by pitching for the published value; for most light singles this is roughly 65–75 KIAS.
2. Select the most suitable landing area within gliding distance, considering wind, terrain, and obstacles.
3. Attempt a restart using the appropriate checklist if time and altitude permit (fuel selector to fullest tank, mixture rich, carburetor heat or alternate air on, magnetos to BOTH, primer in and locked).
4. Declare an emergency on the active frequency or 121.5 MHz and squawk 7700.
5. Configure for landing on short final: flaps as appropriate, fuel and ignition off, doors unlatched, occupants braced.

The Takeoff Briefing

A proper preflight takeoff briefing translates these procedures into specific decisions for the runway and conditions of the day. At minimum, the pilot should brief:

• Abort criteria and the point on the runway beyond which abort is no longer possible
• The action for engine failure after lift-off but below a defined altitude (land straight ahead, ±30°)
• The action for engine failure above that defined altitude (best glide, suitable field, restart attempt)
• Best-glide airspeed for the airplane and current weight

Key Airspeeds and Concepts

• V_X (best angle of climb): used to clear obstacles; lowest speed for the steepest gradient.
• V_Y (best rate of climb): used for most departures; provides the most altitude per unit time and the most energy in the bank for an emergency.
• V_G (best glide): provides the greatest distance per foot of altitude lost, used after engine failure with altitude.

Common Errors

• Failure to lower the nose promptly after a low-altitude failure.
• Attempting a turnback from too low an altitude.
• Diverting attention to the engine instead of flying the airplane.
• Stalling while maneuvering to a landing site.
• Failure to secure the airplane (fuel, ignition, master) before touchdown, increasing post-crash fire risk.

Above all, the pilot's first responsibility is to fly the airplane: maintain control, accept the landing site that geometry and energy permit, and use remaining time to mitigate consequences.