System Failure And Caution Annunciations - Cirrus SR22 Pilot Operating Handbook

Cirrus Design
SR22

System Failure and Caution Annunciations

If any of the following failure annunciations occur at low altitude or
during an actual instrument approach, disengage the autopilot,
execute a go-around or missed approach as appropriate. Inform ATC
of problem. Do not try to troubleshoot until a safe altitude and
maneuvering area are reached or a safe landing is completed.
Annunciation
Flashing RDY for 5
seconds with
audible tone.
Flashing RDY with
audible tone then
goes out.
Flashing NAV,
REV, or APR.
Flashing NAV,
REV, or APR with
steady FAIL
Flashing VS
Flashing GS
Flashing GS with
steady FAIL
Flashing GS plus
ALT.
P/N 13772-108
Revision 06: 05-09-11
Condition
Autopilot disconnect. All
annunciations except RDY
are cleared.
Turn coordinator gyro
speed low. Autopilot
disengages and cannot be
re-engaged.
Off navigation course by
50% needle deviation or
more.
Invalid radio navigation
signal.
Excessive vertical speed
error over selected vertical
speed. Usually occurs in
climb.
Off glideslope centerline by
50% needle deviation or
more.
Invalid glideslope radio
navigation signal.
Manual glideslope disabled. Re-enable by pressing
Supplements
Action
None.
Check power to turn
coordinator.
Use HDG mode until
problem is identified.
Crosscheck raw NAV
data, compass heading,
and radio operation.
Check Nav radio for
proper reception. Use
HDG mode until problem
is corrected.
Reduce VS command
and/or adjust power as
appropriate.
Check attitude and
power. Adjust power as
appropriate.
Disconnect autopilot and
initiate go-around or
missed approach
procedure. Inform ATC.
NAV mode button.
Section 9
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