OPERATIONS MANUAL

FMS
ALTN NAV RADIO Page:
1L
2L
3L
Access: NAV RAD key
General: The page is available when both
FMCs fail, and is then accessible on all
three CDUs. As each CDU controls a
different ILS-MLS receiver, data may vary
from CDU to CDU. Also: CDU L refers
to the left VOR/ADF; CDU R to the right
VOR/ADF; CDU C has no VOR/ADF.
1L VOR
Indicates the frequency of the tuned VOR or
DME, followed by the A or M tuning status
(automatic or manual) that was present
when the FMCs failed (autotuning is not
continued when the FMCs are inoperative).
Valid entries
VOR or DME frequency:
XXX.X
XXX.XX
Frequency/course (000-360):
XXX.X/XXX
XXX.XX/XXX
2L CRS
Indicates the entered course for the tuned
VOR, or dashes when the course is deleted.
Indication is blank when the VOR has been
tuned automatically.
Valid entries
Course (0-360):
X
XX
XXX
Frequency/course (000-360):
XXX.X/XXX
XXX.XX/XXX
3L ADF
Indicates the frequency of the tuned ADF,
followed by ANT when in antenna mode,
or BFO when in BFO mode. ANT and BFO
modes can be removed by line deletion.
Valid entries
NDB frequency:
XXX
XXXX
XXX.X
XXXX.X
Tuning mode:
A
B
Frequency and tuning mode:
XXXA
XXXX.XB
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