OPERATIONS MANUAL

FMS
IRS PROGRESS Page:
1L
2L
3L
4L
5L
6L
Access: PROG key
General: Accessible on CDU L or R when
respective onside FMC fails. Accessible
on CDU C when both FMCs fail. Each
CDU receives inertial reference data from
a different IRU, and each CDU route can
be modified individually; hence, the values
displayed may vary from CDU to CDU.
1L LAST
Indicates the last sequenced route waypoint
and the aircraft altitude at that waypoint.
2L TO
Indicates the active waypoint, the distance
to go (DTG) along the route to that
waypoint, and accordingly the time to go
(TTG) in hours:minutes format.
3L NEXT
Indicates the next waypoint after the active
one, the distance to go (DTG) along the
route to that waypoint, and accordingly the
time to go (TTG) in hours:minutes format.
5L IRS (L, C, or R)
Indicates aircraft position and groundspeed
computed by the IRU linked with this CDU.
6L XTK ERROR
Indicates current crosstrack error, followed
by the desired track (DTK) and the current
track (TK). Track angles are based on the
selected heading reference, which refers
either to magnetic (M) or true (T) north.
4L DEST
Indicates the destination airport (copied
from the FMCs before the FMCs failed), the
distance to go (DTG) along the route to that
destination, and accordingly the time to go
(TTG) in hours:minutes format.
Line title DEST is replaced by line title
ENROUTE WPT when a route waypoint is
entered, in which case the data in the line
will refer to the along-route distance and
time to that entered waypoint.
Line title reads DIR TO ALTERNATE when
off-route coordinates are entered, in which
case the data in the line will refer to the
great circle distance and TTG direct to these
coordinates.
Valid entries
Any waypoint name contained in the
route (copied from FMCs before FMCs
failed), or coordinates. For example:
For N27° 59.7’ E086° 55.8’
enter N2759.7E08655.8
For N27° 00.0’ E086° 00.0’
enter N27E086
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