What is TS on Boeing 737? (Terminal Strip)

The Terminal Strip, abbreviated as TS, is a crucial component in the electrical system of Boeing 737 aircraft. It plays a vital role in providing a safe and reliable electrical connection between various electrical components. Essentially, the terminal strip is a panel or a block that contains multiple terminals or connection points, which are used to connect wires and cables from different electrical systems.

The Terminal Strip is responsible for distributing power to different components and systems, allowing them to function properly. It is commonly used in many areas of the aircraft, including the cockpit, avionics bay, fuselage, and wings. Each terminal strip is designed to handle specific electrical loads and carry out specific functions, ensuring the efficient operation of the aircraft.

Additionally, the Terminal Strip enables easy maintenance and troubleshooting of the electrical system. By providing organized and accessible connection points, technicians can quickly identify and resolve electrical issues. This saves valuable time during inspections and repairs, ensuring the aircraft can return to service promptly.

The Importance of Terminal Strip on Boeing 737

The Terminal Strip plays a critical role in the overall safety and reliability of the Boeing 737 aircraft. It ensures proper distribution of electrical power, preventing potential malfunctions and failures. Let’s explore some key reasons why the Terminal Strip is of utmost importance:

1. Electrical Power Distribution

The Terminal Strip serves as the central point for distributing electrical power to various systems and components onboard the Boeing 737 aircraft. It receives power from the main power sources, such as the generators or the onboard power supply, and distributes it to different subsystems, including avionics, lighting, hydraulic systems, and more.

By utilizing the Terminal Strip, each system receives the appropriate amount of power needed for its operation. This controlled and regulated power distribution ensures optimal performance and prevents overloading or underpowering of important systems, greatly enhancing the safety and reliability of the aircraft.

Moreover, the Terminal Strip allows for the isolation of electrical circuits, which is essential for maintenance, troubleshooting, and safety. In case of any electrical issues, technicians can isolate the affected circuit through the Terminal Strip, preventing the problem from spreading to other systems and components.

2. System Integration and Interconnectivity

The Boeing 737 aircraft comprises numerous electrical systems that work together to ensure the aircraft’s proper functioning. The Terminal Strip plays a crucial role in integrating these systems and providing interconnectivity. It acts as a bridge, allowing different systems to communicate and share data seamlessly.

For instance, the Terminal Strip enables communication between the avionics system and the control systems. It allows the exchange of vital information, such as altitude, airspeed, temperature, and navigation data, ensuring accurate flight control and navigation. Without the Terminal Strip, the integration and interconnectivity of these systems would be considerably more complex, leading to potential communication failures and compromised safety.

The Terminal Strip also supports the integration of safety systems, such as the aircraft’s fire detection and suppression systems. It ensures that these critical systems receive power and signal inputs effectively, allowing them to activate in case of an emergency and mitigate potential hazards.

3. Flexibility and Adaptability

One of the key advantages of the Terminal Strip on the Boeing 737 aircraft is its flexibility and adaptability. The modular design of the Terminal Strip allows for easy configuration and customization based on the specific requirements of the aircraft. It offers flexibility in terms of adding or removing terminals or connection points, making it easier to accommodate changes or upgrades in the electrical system.

Furthermore, the Terminal Strip supports the overall weight reduction efforts in aircraft design. It eliminates the need for separate wiring connections for each component, reducing the weight of the electrical system. This weight reduction has a direct impact on the fuel efficiency of the aircraft, resulting in cost savings and environmental benefits.

In addition to the benefits mentioned above, the Terminal Strip also simplifies the wiring harnesses and reduces the complexity of the electrical system, making maintenance and troubleshooting more efficient.


The Terminal Strip plays a vital role in the electrical system of the Boeing 737 aircraft. It enables the proper distribution of electrical power, supports system integration and interconnectivity, and provides flexibility and adaptability. Its importance in ensuring the safety, reliability, and efficiency of the aircraft cannot be overstated.

Understanding the Terminal Strip and its functions contributes to a comprehensive knowledge of the aircraft’s electrical system, which is crucial for pilots, technicians, and aviation professionals.

For more information on the electrical systems of the Boeing 737 aircraft, you can refer to the official Boeing website at www.boeing.com.

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