SV-D700, SV-D1000 and SV-D1000T Operation
SkyView Classic Pilot’s User Guide –
Revision Z
4-27
ADAHRS (Flight Instrument) Redundancy and Cross-Checking
SkyView systems support multiple SV-ADAHRS-20X modules for redundancy and manage failure
scenarios by automatically switching to backup modules should an ADAHRS completely fail.
Additionally, in the event that multiple ADAHRS disagree, the display will annunciate this with
an on-screen alert that calls out which parameter(s) are not the same on all ADAHRS.
Parameters that are continuously cross-checked include attitude (pitch and roll), magnetic
heading, G Meter, turn coordinator (slip/skid ball), airspeed, and altitude.
Figure 55
-
ADAHRS Cross-Checking Disagreement
Once SkyView has annunciated a cross-check comparison problem, press COMPARE to see both
ADAHRS side-by side. The ADAHRS that was previously displayed on the PFD is labeled
“ACTIVE”, while the one that was not pre
viously being displayed - but which was being used as
the cross-check reference
–
will be labeled as “STANDBY”. Additionally, the labels “PRIMARY”
and “ALTERNATE” designate which ADAHRS is normally displayed when both are in agreement
and neither is disabled.
