I A P 2 0 2 3 . 0 0 1 - A F M / I R I S T E X A N I I P A G E | 107
FOR SIMULATION USE ONLY ā NOT A TRAINING AID
NAV MASTER MODE
The persistent display for the NAV master mode allows the pilot to view and change
the current frequencies of the COM1 and COM2 radios and the NAV navaid, as well
as view the current transponder code and mode and access the transponder
control page.
W1 - displays COM1 UHF frequency and pressing W1 activates the W1 data entry
mode and displays an outward facing filled triangle in the left-most character
location.
In the case of an FMS failure, W1 has no control functionality.
W2 - displays COM2 VHF frequency. Pressing W2 activates the W2 data entry mode
and displays an outward facing filled triangle in the left-most character location. In
the case of an FMS failure, W2 displays the COM2 frequency left justified.
If the standby VHF control head is powered, W2 displays REMOTE, indicating control
at the standby VHF.
W3 - displays the radio navigation frequency. Pressing W3 activates the W3 data
entry mode and displays an outward facing filled triangle in the left-most character
location. In the case of an FMS failure, W3 displays the NAV frequency left justified.
W4 - displays the current transponder code and mode. When the W4 key is pressed,
the UFCP displays the transponder control page. The transponder code is displayed
starting in the second character position of the window, and consists of a four-digit
octal number.
The transponder mode is displayed right justified as one of SBY (standby) or ALT
(altitude) when the radio is in active mode and ALT is selected.
In the case of an FMS failure, W4 displays the transponder mode code left-justified
and operational mode right-justified and has no control functionality.
UFCP Defaults
The UFCP has default values for most data items, and these default values depend
on how the UFCP has been powered up. The initial default values apply on the first
occasion the UFCP has been powered up, and also apply if the UFCP cannot access
the saved values from the previous operation (e.g., after a maintenance operation).
The cold start values apply when the UFCP has been powered up with the aircraft
on the ground with power off for more than 90 seconds.
Warm start values apply in all other cases and when the aircraft is in the air.
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