What is PNL on Boeing 737? (Panel)

The Boeing 737 is one of the most widely used aircraft in the world, known for its reliability, versatility, and efficiency. As a commercial aircraft, it is crucial to ensure the safety and functionality of various components, including the panel. The panel, abbreviated as PNL, plays a vital role in the operation and control of the aircraft. In this article, we will delve into the significance of the panel on the Boeing 737 and explore its functionalities.

Understanding the Panel on Boeing 737

The panel on the Boeing 737 refers to the instrumentation and control devices located in the cockpit. It provides critical information and allows the pilots to monitor and control the aircraft’s systems, ensuring the safety of the flight. The panel consists of various components, each serving a specific purpose in the operation of the aircraft.

The Components of the Panel on Boeing 737

The panel on the Boeing 737 comprises several essential components that contribute to the overall functionality of the aircraft. Let’s take a closer look at some of these components:

FMC (Flight Management Computer)

The FMC, or the Flight Management Computer, is a crucial component of the panel on the Boeing 737. It is responsible for automating various aspects of the flight and ensuring efficient navigation and control. The FMC stores and processes data such as flight plans, performance calculations, and navigation waypoints. It allows the pilots to input desired flight parameters and monitors the aircraft’s progress throughout the journey. Through the FMC, the pilots can manage fuel consumption, optimize routes, and navigate the aircraft with precision.

EICAS (Engine Indicating and Crew Alerting System)

The EICAS, also known as the Engine Indicating and Crew Alerting System, is another critical component of the panel on the Boeing 737. It displays real-time information about the performance and health of the aircraft’s engines, systems, and various other parameters. The EICAS provides the pilots with vital alerts, warnings, and advisories to ensure the safe operation of the aircraft. It enables them to monitor engine performance, fuel consumption, and system statuses, allowing for timely responses to any anomalies or malfunctions.

EFIS (Electronic Flight Instrument System)

The EFIS, Electronic Flight Instrument System, is an advanced component of the panel on the Boeing 737 that provides centralized displays for primary flight information. It replaces the traditional analog instruments, such as attitude indicators, altimeters, and airspeed indicators, with digital screens. The EFIS offers pilots a more intuitive and comprehensive view of critical flight data, enhancing situational awareness and reducing the workload during flight operations. The system displays information such as altitude, airspeed, heading, vertical speed, navigation data, and system statuses.

These are just a few examples of the essential components that make up the panel on the Boeing 737. Each component serves a specific purpose, contributing to the overall safety, efficiency, and functionality of the aircraft.


The panel on the Boeing 737 is a critical part of the aircraft’s cockpit, providing pilots with crucial information and controls necessary for safe and efficient flight operations. Components such as the FMC, EICAS, and EFIS play integral roles in ensuring the aircraft’s performance, navigation, and system monitoring. Understanding the importance and functionalities of the panel allows for a deeper appreciation of the complexity and precision involved in operating the Boeing 737.

For More: What is DP on Boeing 737? (Differential Protection)