Performance Priority Selections; Default Dau Channel - Honeywell SPZ-8000 Maintenance Manual

Honeywell
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Performance Priority Selections
The priority PZ-800 Performance Computer will follow the NAV
priority. In order to determine PZ-800 priority with on-side
NAV invalid, off-side NAV is also checked. When both NAV
computers are invalid, the FMS displayed on the PFD selected
EFIS determines priority. With both NAVS and autopilots
invalid, the FMS displayed on the pilot's displays determines
priority. When one NAV only is valid, the PZ-800 on-side with
that NAV is the only PZ-800 that can set priority.
The priority PZ-800 uses the DADC as indicated by the FGC.
When the FGC is invalid, the left EFIS DADC display determines
the DADC selection.
For the flap settings, a comparison of both ADC flap settings
is made provided both DADC flap settings are valid. This
comparison has a one-second debounce. That is, itwill take 10
miscompares (based on receiving the DADC every 100 ms) before
the PZ-800 will declare flap position invalid. If they do not
agree for the full second, the flap setting is marked invalid.
If there is only one valid flap setting, that flap setting is
received and marked valid.
FGC data comes from the priority FGC provided the data is
valid.
If both
FGCS are high priority or both are low
priority, the FGC is considered invalid.
The performance computer receives the PFD selected DC-884
Display Controller (DC) if valid. If the selected DC is
invalid, the other side DC is read.
If the PFD selection is neither or both (dual) the previously
selected DC remains selected. The previous DC is initialized
to left DC on power-up.
If there is no autopilot, the left DC is selected if valid.
otherwise the right"
If there are no DCS
PERF1
PERF2
DC is selected.
the following DAU channel
Default DAU Channel
(left) CHANNEL A
(right)
CHANNEL B
defaults are set:
If the left or right EPR value is manually set on the dis~lay
controller on the-second page of the TRS pages, then that"EPR
is used as the rating. When the DC is in the DUAL manual EPR
mode, the two EPR values will be the equal. Only when the mode
is SPLIT can the two values differ. The lowest of the two
values will always be used.
22-14-00
Page 298.172
Aug 15/91
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