How Far Can a 777 Fly on One Engine: Learn Most Dangerous Phase About

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The Boeing 777 is a popular commercial aviation plane known for having more than one engine. However, in the unlikely event that one of the engines fails mid-flight, it raises the question of how far can a 777 fly on one engine

Let’s find out, and also consider how many engines it has, and what happens when an engine fails!

How Far Can a 777 Plane Fly with Only One Engine at Altitude? 

There are some things you should know about the Boeing 777 flight with just one engine:

  1. If a single engine fails, this twin-engine aircraft can fly as far as 8,555 nautical miles.
  2. A gas turbine engine’s fuel consumption is inversely proportional to how much air it moves.
  3. The air density decreases with altitude, resulting in a reduction in fuel consumption. This results in a much slower flight and a shorter range. 
  4. A passenger jet typically flies at the highest altitude possible, depending on the available thrust from all the engines.
  5. If the plane’s engines fail, the crew takes appropriate measures.
How Far Can a 777 Plane Fly with Only One Engine at Altitude

The Boeing 777: a Twin Engine Aircraft

The Boeing 777 passenger jet is a twin-engine aircraft manufactured by the American aerospace company, Boeing. The aircraft was first introduced in 1995, and has since become one of the most popular wide-bodied aircraft in the world. 

The Boeing 777 Design 

The 777 is a wide-bodied aircraft, with a cabin width of more than 20 feet and a cabin length of more than 220 feet. The aircraft is powered by two engines (General Electric GE90-115B), each producing up to 115,000 pounds of thrust. The aircraft is capable of carrying up to 400 passengers and has a range of up to 7,400 nautical miles.

Interior of the Boeing 777

The interior of the 777 is designed for comfort and convenience. The cabin features a modern design with wide aisles, comfortable seats, and plenty of overhead storage space. The aircraft also features a variety of entertainment options, including in-flight Wi-Fi and onboard video screens.

The Boeing 777 Safety 

This twin-engine plane is one of the safest aircraft in the world, with a number of advanced safety features. The aircraft is equipped with a two-pilot crew, and is designed to be able to fly safely even if one of the engines fails.

How Far Can a 777 Fly on One Engine The Boeing 777

Engine Failure on a Boeing 777 Airplane

Engine failure is a common fear for many people, fueled by stories of catastrophic events. In 2003, during a United Airlines flight from Auckland to Los Angeles, the crew faced a technical issue indicating low oil and high temperature in a single engine, leading them to shut it down. 

The twin-engine aircraft was beyond the halfway point to Hawaii, so they chose to divert and land there within the plane’s ETOPS rating of 180 minutes. Strong headwinds forced the plane to fly on just one engine, setting a new record for emergency single-engine operation.

Can a Plane Fly When All Its Engines Fail

Airlines use engines to provide thrust during descent, allowing planes to fly smoothly even if all engines fail. At 36,000 feet, a plane can fly about 60 miles without using its engines. Flights often descend with the engines at ‘idle’ to maintain forward speed.

Single Engine Flying on a Boeing 777

In the unlikely event of an engine breakdown, even a large plane like the Boeing 777 may need to fly with a single engine. The 777 is a twin-engine plane certified to fly with one engine for more than five hours, giving pilots ample time to find and land at the nearest suitable airport. 

Standard operating procedures are in place. The flight crew contacts air traffic control declares an emergency and reduces altitude. This ensures the passenger jet can operate with one engine and land safely on only one engine.

How Far Can a 777 Fly on One Engine Single Engine Flying on a Boeing 777

Can a Boeing 777 Plane Fly with Only One Engine?

Yes, a Boeing 777 can fly with one engine even though taking off with only one working engine is unusual for an aircraft with two engines like the 777. Thorough inspections are performed before this critical stage of the flight.

If an engine fails during takeoff, the pilot can still complete the takeoff and fly the aircraft to a safe landing, provided sufficient runway is available.

Actions Taken by Pilots in the Event of a Boeing 777 Engine Failure

In the event of a 777 jet engine’ failing, pilots must follow a procedure that ensures the safety of onboard passengers and flight crew. 

  • The first step is to “Aviate,” which means flying the aircraft in a controlled and stable manner. To determine the extent of the damage, the aircraft must be stable. 
  • Next, the pilots will “navigate,” locating the aircraft and modifying the flight path to avoid potential dangers. 
  • They will also communicate with air traffic control and other pertinent parties to relay information and receive instructions.
  • The pilots will focus on keeping the aircraft under control and in the air if there are no signs of a fire.
  • The pilots will attempt to restart the single-engine if the issue is serious, or they will attempt to land safely on a nearby runway.

Shutdown Procedures Following an Engine Failure on a Boeing 777

Shutdown procedures for an Engine Failure on a Boeing 777 are Following:

How Far Can a 777 Fly on One Engine Shutdown Procedures Following an Engine Failure on a Boeing 777
  • The flight crew will check the “Engine Fire Memory Actions” list after safely shutting down one engine to make sure they follow the right steps.
  • They will carry out more tasks listed on the checklist if everything is in order before continuing.
  • The pilots will use a different checklist to find the issue if the engine fails. They will make an effort to restart the engine if there are no visible signs of damage.
  • If this fails, they will make a safe emergency landing at the nearest suitable airport. Perhaps this was not the one they intended to use.

Memory Procedures for an Engine Fire or Serious Engine Damage

Any pilot may face a life-or-death situation in the event of an engine fire or significant engine damage. Take the following actions to ensure safety in the event of an engine fire or significant engine damage: 

  • Close the engine (Affected by the thrust lever) – This will reduce fuel flow to the damaged engine, which may help contain the damage and prevent further escalation.
  • Confirm the engine is not started by removing the engine start lever. Start the one engine by connecting the fuel line to the fuel pump. Make sure there is no fire and reduce the risk of something happening by doing this. 
  • Pull the fire switch to activate the fire suppression system and help remove any flames that may have started in the engine.
  • If the engine fire switch or engine overheat light stays on after you pull the switch, turn it to the “stop” position and hold it for one second to reset the system.
  • If the fire switch or engine overheats, turn it opposite to reset it. 
Memory Procedures for an Engine Fire or Serious Engine Damage

Causes of Engine Failure on the Boeing 777

Pilots may fail or shut down an aircraft engine for various reasons. Here are some possible explanations.

  • Mechanical Failure or Malfunction: This can be caused by various factors, including improper maintenance, incorrect operation, wear and tear, and even improper installation. 
  • Fuel Starvation: It can occur when the tank has insufficient fuel to support the aircraft’s operations. This can happen for various reasons, such as the aircraft running out of fuel, or the fuel system being blocked by debris.
  • Bird Strike or Other Foreign Object Damage: This occurs when a bird or other objects, such as rock, ice, or debris, enters an aircraft engine. Causing damage to the fan blades, resulting in reduced performance or complete failure of the engine
  • Electrical System Failure: The Boeing 777 is a twin-engine jetliner, its engines are powered by an electrical system. If the electrical system fails, these components will not receive the necessary power to operate, resulting in engine failure. 

What are the Impacts of an Aircraft Engine Failure?

Some of the serious implications of a 777 engine failure for an aircraft and its passengers are listed below.

What are the Impacts of an Aircraft Engine Failure

1. Altitude

The aircraft won’t be able to maintain its current cruising altitude if half of its power is lost. An immediate descent to an intermediate altitude is necessary for the most statistically likely scenario for the failure to occur during the cruise. 

With the remaining engine, we should be able to control this altitude. Most aircraft usually fly between 15,000 and 25,000 feet in the air, depending on weight.

2. Asymmetric Thrust / Controllability

A 777 engine failure may result in asymmetric thrust. Pilots must constantly change their speed, thrust, and altitude to stay balanced and in control. To offset the effects of uneven thrust, they use the rudder pedals.

3. Landing Performance

The pilot must modify the flap configuration when an aircraft’s engine fails to land. They must take a go-around maneuver’s performance by the aircraft into account.

How Far Can a 777 Fly on One Engine Landing Performance

Longer landing distances are required when the flap configuration is lower. The weather at the airport, the runway length, and the aircraft’s weight must all be taken into account when landing.

4. System Redundancy

Hydraulic, pneumatic, and electrical systems are just a few crucial ones that the aircraft is powered by. Due to the use of the other engine, a partial engine failure may result in the loss of some crucial components.

Pilots must act quickly to reduce risks because there may be an impact on the handling and performance of the aircraft.

Most Challenging Phase of Flight to Have an Engine Failure

The most challenging time for a pilot to experience an engine failure is during takeoff, which includes the beginning of the ground roll until the plane reaches about 1,500 feet.

Most Challenging Phase of Flight to Have an Engine Failure

Pilots undergo rigorous training and are regularly tested in a simulator every six months to demonstrate their ability to manage an engine failure. If they meet the standard, they can fly once they pass the test.

During Takeoff

The pilot uses a carefully calculated speed known as V1 to decide what to do during an engine failure. Pilots must execute an abort maneuver known as a “Rejected Takeoff” in the aviation industry if one engine fails before reaching V1 (RTO). 

With the remaining runway length available, continuing the takeoff would need more engine power to reach the necessary speed.

Continuing a Takeoff Despite Engine Failure

If a failure happens after V1, the pilots must take off and make sure the aircraft is in the air. Even though stopping the takeoff at this point wouldn’t leave enough runway to safely stop the aircraft, the pilots must continue.

The pilots will focus on flying the aircraft and managing its altitude until the aircraft is about 400 feet in the air. They will review the situation and then take any necessary memory actions.


How far can a Boeing 777 fly without refueling?

A Boeing 777 can fly up to 9 290 nautical miles (17,446 km) without refueling. However, the range of a Boeing 777 varies depending on the type of aircraft and the number of passengers and cargo it carries.

Can a Boeing 777 300ER fly on one engine?

Yes, a Boeing 777 300ER can fly on one engine. This is because the aircraft is equipped with two turbofan jet engines, allowing it to safely continue its flight even if one single engine failure.

Does a 777 have 2 or 4 engines?

The Boeing 777 has two engines which is the GE90-115BL mode. The Boeing 747 is a good example of a plane with more than two engines.

How far can a Boeing 777 fly?

The Boeing 777-200LR World liner (Longer Range), the model can fly a maximum of 9,290 nautical miles.

Is the Boeing 777 the safest plane?

Yes, the Boeing 777 is the safest plane with a good safety record. There have been no fatal accidents involving the plane since it entered service in 1995. However, like all airplanes, the 777 has had some incidents and accidents.


The question of how far can a 777 fly on one engine is crucial for pilots and passengers alike. it depends on how many engines break down and how many continue to run. In the case of the Boeing 777, it is possible to fly this twin-engine aircraft on a single engine

So, don’t worry the Boeing 777 is a reliable and efficient aircraft that can travel long distances on only one engine. Have you ever flown on a Boeing 777? Share your experience in the comments below.

Author - Willa Carson
Happywayfarer author Willa Carson
Hi, I'm Willa Carson, a passionate traveler who has been exploring the world for 7 years. Whether it's trekking through the Himalayas, exploring ancient ruins in South America, or simply savoring a cup of coffee at a local cafe, I believe that travel has the power to enrich our lives in countless ways. So join me on my journey and let's discover the world together!
Read more about me here.

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