*
Advisory
*
Comm
*
Memo.
During the inhibit, message processing continues but the messages do not show.
The starter cutout inhibit stops when one of these happens:
*
The starter cutout condition goes away
*
A new caution message occurs that is not subject to ESI inhibits
*
20 seconds after it starts
*
You push the CANCL/RCL switch.
Message Inhibit
Some messages cause other messages not to show. As an example, the caution message ENG R SHUTDOWN inhibits the advisory message ENG CONTROL R.
General Inhibit
Some airplane conditions cause certain messages not to show. As an example, airplane-on-the-ground inhibits the advisory message ICING WING.
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PRIMARY DISPLAY SYSTEM -EICAS INHIBITS SUMMARY
Flight Phase Inhibits
There are several flight phase inhibits.
The advisory message takeoff inhibit prevents the display of all advisory messages during takeoff.
The comm message takeoff inhibit prevents the display of comm messages during takeoff except CABIN ALERT.
The status cue inhibit prevents the display from first engine start to top of climb or 30 minutes after liftoff.
The comm message landing inhibit prevents the display of comm messages during landing except CABIN ALERT.
The caution/advisory landing inhibit prevents the display of caution and advisory messages during landing. These are the exceptions:
*
AUTOPILOT
*
NO AUTOLAND
*
SPEEDBRAKE EXTENDED
*
AUTOTHROTTLE DISC.
Master Caution Light and Caution Aural Tone Inhibits
There are two master caution lights and aural tone inhibits. They are the:
*
Airplane takeoff inhibit
*
All engine shutdown inhibit.
The airplane takeoff inhibit prevents the lights and tone during takeoff. The inhibit starts as the airplane accelerates through 80 knots and ends when one of these happens:
*
The airplane reaches 400 feet of radio altitude
*
20 seconds after it starts
*
The airplane slows to less than 75 knots.
The all engine shutdown inhibit prevents the lights and tones when the airplane is on the ground and both engines are shut down.
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PRIMARY DISPLAY SYSTEM -EICAS INHIBITS SUMMARY
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PRIMARY DISPLAY SYSTEM -EICAS MESSAGE PROCESSING
General
EICAS shows messages when certain conditions are met. Each type of message goes through several possible conditions before it shows on the display. Each message condition needs certain logic to be true.
Crew Alert Messages
Crew alert messages have these three possible conditions:
*
ENABLED
*
ACTIVE
*
DISPLAYABLE.
A message is ENABLED when the logic is true and configuration requirements are true.
A message is ACTIVE when it is ENABLED and there are no inhibits.
A message is DISPLAYABLE when it is ACTIVE and it is not cancelled.
ACTIVE crew alerting messages that are inhibited by the starter cutout inhibit or that go away because of an overflow condition are DISPLAYABLE. Use the CNCL/RCL switch on the display select panel (DSP) to review the starter cutout inhibit messages. Also use the CNCL/RCL switch to go to the next page to review the overflow messages.
Status Messages
Status messages have these four possible conditions:
*
ENABLED
*
CURRENT
*
ACTIVE
*
DISPLAYABLE.
A message is ENABLED when the logic is true and configuration requirements are true.
A message is CURRENT when it is ENABLED and there are no inhibits. (ESI must be false or ESI became true after the message was ACTIVE.)
A message is ACTIVE when it becomes current or when it is latched.
A message is DISPLAYABLE when it is ACTIVE and it is not cancelled.
ACTIVE status messages that go away because of an overflow condition are DISPLAYABLE. Use the STAT switch on the DSP to go to the next page of messages.
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PRIMARY DISPLAY SYSTEM -EICAS MESSAGE PROCESSING
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PRIMARY DISPLAY SYSTEM -STATUS PAGE FORMAT
General
The status display shows information that helps the technician make a decision on the dispatch status of the airplane.
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