What is DSPL on Boeing 737? (Display)

The Boeing 737-800 is a popular and widely used aircraft in the aviation industry. It is equipped with advanced technology and systems to ensure safe and efficient flight operations. One of the essential components of the Boeing 737-800 is the Display System (DSPL), which provides vital information to the flight crew during all phases of flight.

The Display System on the Boeing 737-800 consists of several displays located in the flight deck, designed to enhance situational awareness and facilitate effective decision-making. These displays present information such as flight parameters, navigation data, engine performance, system status, and various aircraft systems.

The purpose of this article is to explore the different types of displays on the Boeing 737-800 and their functionalities.

The Primary Flight Display (PFD)

The Primary Flight Display (PFD) is the most critical display on the Boeing 737-800. It is located directly in front of the pilot and co-pilot and provides essential flight information. The PFD presents data on aircraft attitude, altitude, airspeed, vertical speed, heading, and navigation information such as waypoints and flight paths.

The PFD uses symbols, colors, and digital readouts to convey information to the flight crew. For example, the aircraft attitude is represented by an artificial horizon, which shows the aircraft’s pitch and roll. Altitude and airspeed are displayed numerically, while vertical speed is indicated by a vertical trend vector.

The PFD also incorporates warning and caution messages, which alert the flight crew of any abnormalities or system malfunctions. These messages are displayed on the PFD in a prominent manner to ensure immediate attention and appropriate action.

The Navigation Display (ND)

The Navigation Display (ND) on the Boeing 737-800 provides a graphical representation of the aircraft’s position and the surrounding airspace. It integrates data from various navigation sources, including global positioning system (GPS), inertial reference system (IRS), and radio navigation aids.

The ND displays a moving map, which shows the aircraft’s current position, the planned route, and the waypoints along the way. It also provides information on nearby airports, airspace boundaries, and terrain features. The ND can be customized to display different navigation modes, such as the ground track, heading, or bearing to a selected waypoint.

In addition to navigation information, the ND also presents weather radar information, traffic alerts, and system status messages. This allows the flight crew to have a comprehensive understanding of the external environment and make informed decisions.

The Engine Indicating and Crew Alerting System (EICAS)

The Engine Indicating and Crew Alerting System (EICAS) is another essential component of the displays on the Boeing 737-800. It provides real-time information about the aircraft’s engines, systems, and various subsystems.

The EICAS display shows parameters such as engine thrust, exhaust gas temperature, oil pressure, fuel flow, and electrical system status. It also presents alerts and cautions related to engine performance, system failures, or abnormal conditions. The EICAS allows the flight crew to monitor the engine and system conditions continuously and take appropriate actions in case of any anomalies.

The EICAS display is designed to prioritize the most critical information and present it in a clear and concise manner. It uses color coding and visual cues to highlight abnormal conditions and ensure quick identification by the flight crew.

In conclusion, the Display System (DSPL) on the Boeing 737-800 is a vital component that provides critical flight information to the flight crew. The Primary Flight Display (PFD), Navigation Display (ND), and Engine Indicating and Crew Alerting System (EICAS) are three key displays that enhance situational awareness, facilitate decision-making, and ensure the safe and efficient operation of the aircraft. By effectively utilizing these displays, the flight crew can navigate, monitor and control the aircraft with precision and confidence.

For More: What is MDA on Boeing 737? (Minimum Descent Altitude)