PRIMUSr 1000 Integrated Avionics System
A28--1146--112--00
Electronic Flight Instrument System (EFIS)
4-36
- IAS and baro altitude must be valid on both PFDs.
- There are no SG, AHRS, or ADC reversions.
- There are no comparison monitor annunciations
- Two symbol generators must be operational.
If these criterias are not met when the APR mode is selected, the
system defaults out of CAT2 because it is programmed to assume
that the pilot does not care to perform the ILS approach with the
CAT2 monitors active. Thereis no approach category annunciation
givenonthePFDinthiscase.Ontheother hand,ifCAT2conditions
were met, but then lost, CAT1 flashes for 5 seconds and goes on
steadily.
D CAT2 Deviation Scale and Pointer -- When the CAT2 mode
annunciation is displayed, as shown in figure 4--21, the ILS
excessive deviation monitors are active. If the localizer deviation
exceedstheCAT2windowrequirementswithradioaltitudelessthan
500 feet, the deviation pointer and scaleare changed from green to
amber. The scale also flashes. The display reverts back to green if
the deviation is brought back within the threshold. The same logic
and symbols apply totheglideslopedeviation scale. In addition, the
CAT2 annunciation turns amber and flashes. The monitors are
independent with the thresholds set in accordance with regulatory
guidance for Category 2 ILS operations.
To Next Page
Loading...
