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757 MAINTENANCE MANUAL
 (c)  
GUN 051; Brake temperature is also displayed along the right side of the page.

 (d)  
Control surface position indicators are provided for the rudder, left and right ailerons, and left and right elevators.

 (e)  
The status message list indicates conditions critical only to dispatch of the airplane and, while available to the pilot, are not needed in flight. They are explained later in the EICAS messages section.

 (f)  
GUN 051; Brake temperature readouts are provided for each individual brake. Both box and readout are normally light blue in color. When at threshold temperatures the box of the brake with the highest temperature will change to white. If the temperature reaches abnormal conditions, both the box and number turn white.

 (g)  
In the event of an EICAS display unit failure, the status page cannot be selected while the airplane is in the air. The status page can still be selected when the airplane is on the ground. When this is done, the standby engine indicator will display primary engine parameters.

Compacted Mode Page

 (a)  
The compacted mode page displays both primary and secondary engine indicators and alert messages on a single display unit. The compacted mode appears under both normal operating conditions and during failure modes.

 (b)  
The full compacted page is displayed when a maintenance page is selected. The compacted page will then appear on the top display unit and the maintenance page on the bottom display unit.

 (c)  
When a pilot's display unit fails, the primary engine page, including alert messages, appears normally on the remaining display unit. If a secondary engine parameter goes into an exceedance condition, it will automatically be displayed as usual. The parameter will be shown only in digital readout form. This is known as a partial-compacted format.

 (d)  
The full compacted page is displayed when a display unit has failed and the ENGINE key has been pressed. All primary and secondary parameters are then displayed.

Maintenance Display Pages (Fig. 5A-5E)
 (a) Five different maintenance pages can be displayed on the bottom display unit. These pages are controlled using the EICAS maintenance panel. 1) The ECS/MSG page contains both Environmental Control System (ECS) parameters and EICAS maintenance messages (MSG). This message list consists of repeats of most status messages, as well as additional maintenance only messages. Maintenance messages are discussed further in a later section.
 2)  The ELEC/HYD page contains both Electrical (ELEC) and Hydraulic (HYD) System parameters.
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