What is T/R on Boeing 777? (Thrust Reverser)

The Thrust Reverser, often abbreviated as T/R, is a crucial component of the Boeing 777 aircraft. As the name suggests, it plays a vital role in reversing the direction of thrust generated by the engines. This mechanism allows the aircraft to rapidly decelerate after landing, aiding in the reduction of landing distances and enhancing safety. In this article, we will delve into the workings of the Thrust Reverser on the Boeing 777 and explore its significance in the aviation industry.

How Does Thrust Reverser Work?

The Thrust Reverser system on the Boeing 777 employs a complex mechanism that operates upon the completion of the landing phase. After the aircraft touches down on the runway, the pilot activates the Thrust Reverser, initiating a sequence of events that redirect the engine’s exhaust airflow.

Within the engine cowling, a series of cascading doors called “petals” open to direct the engine’s exhaust gases forward instead of backward. This redirection of the exhaust airflow produces a countering force against the direction of the aircraft’s movement, enhancing the braking effect.

The Thrust Reverser system on the Boeing 777 is typically deployed with the landing gear firmly planted on the ground. As the doors open to redirect the exhaust gases, it essentially creates a barrier that restricts the forward movement of the aircraft. This mechanism translates into a significant reduction in landing distances, allowing for safer and more efficient operations.

Importance of Thrust Reverser in Aviation

The incorporation of a reliable and efficient Thrust Reverser system, such as the one found on the Boeing 777, is of utmost importance in the aviation industry. It plays a vital role in enhancing the safety and operational efficiency of the aircraft during landing operations.

The primary benefit of the Thrust Reverser system is its ability to significantly reduce landing distances. By redirecting the engine’s exhaust airflow forward, the system generates a countering force that aids in decelerating the aircraft. This allows for shorter landing distances, particularly important when operating from shorter runways or in adverse weather conditions.

Furthermore, the Thrust Reverser system enhances the effectiveness of the brakes by providing an additional braking force. This not only reduces reliance on the braking system alone but also extends its service life. As a result, airlines can reduce maintenance costs and improve overall operational efficiency.

In addition to improving safety and operational efficiency, the Thrust Reverser system also enhances passenger comfort during landing. By reducing the landing distance, the system minimizes the deceleration forces experienced by passengers, resulting in a smoother and more comfortable landing experience.


The Thrust Reverser system is an essential component of the Boeing 777 aircraft, providing crucial benefits in terms of safety, operational efficiency, and passenger comfort. By redirecting the engine’s exhaust airflow, the system facilitates shorter landing distances, reduces reliance on the braking system, and enhances the overall flight experience. The incorporation of an efficient and reliable Thrust Reverser system has undoubtedly contributed to the success of the Boeing 777 in the aviation industry.

For More: What is FDH on Boeing 777? (Flight Deck Handset)