Table 3C-16. CDU Annunciation Line Priorities
no gps appr
no appr raim
no keys zero
no appr vnav
XXXX:XX represents the UTC time (e.g., 0810:40)
Table 3C-17. Additional Alerts
TYPE OF ALERT
Within waypoint alert prior to waypoint sequence when in EN ROUTE and
OCEANIC sensitivity modes. Ten seconds prior to waypoint sequence
when in TERMINAL and APPROACH sensitivity modes.
FMS in Terminal Mode.
FMS in Transition or Approach Mode.
GPS RAIM function detects error (RAIM Warn).
Parallel offset has been applied to the active flight plan.
CDU MSG Alert Light
The MSG Alert column in this table lists which annunciations are
accompanied by a message alert.
No INPUT (with a blank
A bus terminal has taken control of the MIL-STD -1553 bus, but is not
responding as a bus controller. Activate the bus-split switch to split
operations and isolate the faulty device on the 1553 bus.
CDU has experienced a catastrophic failure of the CDU chip or a flash
memory fault and should not be used for navigation because navigation
data may be corrupted and extremely unreliable. Switch to backup
navigation means immediately.
Resetting the CDU power may restore full operation if the
failure was caused by the CDUs misreading its terminal
address during cyclic power fluctuations. If this occurs,
cross-check all navigation data until you are ensured that
the primary FMS-800 system is operating properly.