MD-11 Flight Crew Operations Manual
k
Aircraft General -
Description and Operation
Agen.10.23
Failure Annunciations
Invalid data and cross-side miscompared data are the two types of failure
annunciations. Invalid data is removed from the screen. Miscompared data is
displayed with a flag.
When invalid data is removed from the screen, it may be replaced by a flag (some
non-essential data is removed from the screen only). These flags consist of an X
covering the area of removed data.
The Xs may be of two colors:
• Red Xs signify a loss of data requiring immediate crew awareness and
action to restore the loss of data.
• Amber Xs signify a loss of data requiring immediate crew awareness but
action to restore the data may be momentarily deferred.
Cross-side miscomparisons are generated when the EIS detects significant
differences between the displayed data of the Captain's and First Officer's
instruments. These comparisons are limited to attitude, airspeed, altitude, radar
altitude, ILS and heading.
The detected miscomparisons will be displayed in amber in the upper left-hand
corner of the PFD, just outside of the attitude sphere.
Display Source Annunciation
Normal (on-side) display sources are not annunciated. Abnormal (off-side)
sources are annunciated near the associated symbology. These annunciations are
white if the Captain and First Officer displays are driven from separate sources
and amber if the displays are driven from the same source. Same source
annunciation is displayed on both sides.
Data Dropout
In the rare event of EIS data loss, protection schemes ensure that the PFD will
display pitch, roll, and altitude. The EAD will display engine thrust settings.
October 02, 2006
To Next Page
Loading...