*
APU information
*
Crew oxygen information
*
Status messages.
You use the status display switch on the display select panel (DSP) to select the status display on the multifunction display (MFD).
Hydraulic System Information
Digital display of hydraulic fluid quantity shows as a percentage; 1.00 equals full. Hydraulic fluid pressure shows for each of the three hydraulic systems.
These messages show next to the quantity readouts when the condition exists:
*
LO (low)
*
RF (refill)
*
OF (overfill).
The LO message is amber and the RF and OF messages are white.
APU Information
APU information shows below the hydraulic information. The APU information includes:
*
APU exhaust gas temperature (EGT), in centigrade
*
APU rotor speed
*
APU oil quantity
*
APU oil pressure
*
APU oil temperature.
Crew Oxygen
Crew oxygen status shows below the APU information.
Status Messages
Status messages have a relation to conditions that affect dispatch. The technician uses applicable publications to make a decision on the dispatch status of the airplane.
The status message field holds eleven messages on each page. Use the status display switch on the DSP to page through multiple pages of status messages. When the last page of status messages shows, a push of the status display switch causes the display to go away.
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General
The status message field shows in the lower left corner on the status display (MFD). Status messages show the dispatch status of the airplane in the status message field. A status message is based on the requirements of the master minimum equipment list (MMEL). The most recent message shows at the top of the list.
The STATUS cue field shows on the EICAS display when the status display does not show and a new status message occurs. The STATUS cue shows below the memo message field.
These are the two types of status messages:
*
Non-latched
*
Latched.
Non-Latched
Non-latched status messages show on the status display when some malfunctions occur in the systems monitored by AIMS. The newest message shows first. When the condition that causes the message goes away, the message on the status page format goes away.
If more than eleven messages exist, they overflow to additional pages and a page number shows below the status message field. Use the status display switch on the display select panel (DSP) to page through multiple pages of status messages. When the last page of status messages shows, a push of the status display switch causes the display to go away.
Latched
Latched status messages also show on the status display when malfunctions occur in systems monitored by AIMS. They have the same priority as non-latched status messages. The most recent message of either type shows at the top of the list.
These are the three types of latched status messages:
*
Ground only
*
Air only
*
Either air or ground.
AIMS stores latched status messages in memory. The messages go to the central maintenance computing function (CMCF) for flight deck effect correlation.
Latched messages allow the maintenance technicians to look at failures that occur in specific flight phases and may not be present or active all the time.
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Latched status messages do not go away when the condition that causes the message goes away. Some latched status messages require the technician to do the necessary repair and then use the ERASE function on the MAINTENANCE TASK maintenance page to erase the messages. Other latched status messages require the technician to do the necessary repair and then do a ground test of the system to erase the message.
Status Cue
A STATUS cue shows on the EICAS display any time a new status message becomes current and the status page format does not show. The STATUS cue is cyan.
There is a fifteen second time delay before the STATUS cue shows. This prevents transient messages.
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