Cirrus SR22 Pilot Operating Handbook page 286

S 7: A
ECTION IRPLANE AND
A
VIONICS
Serials w/ dual Air Data Computer (ADC) installations: The Outside Air
Temperature (OAT) from the selected-side ADC will be used. If the OAT
becomes invalid, the VDI on that side will be flagged as invalid. The pilot
must select the off-side ADC sensor and VDI will return regardless of if
prior to or after the FAF.
Sensor Comparison Annunciation
Serials w/ dual Air Data Computer (ADC) installations:
The temperature compensated altitudes from ADC1 and ADC2 are contin-
uously compared. If a miscompare of greater than 50 feet is detected, the
text "VDI MISCOMP" is displayed in the sensor comparison annunciation
area on the PFD in black text with an amber background.
When a temperature-compensated altitude is not available for comparison,
a "VDI NO COMP" annunciation is posted in comparison annunciation
area on the PFD in black text with a white background.
7-80
S
YSTEMS
C D
IRRUS ESIGN
SR22
P/N 13772-006
Reissue A