Cirrus SR22 Pilot's Operating Handbook And Flight Manual page 365

Cirrus Design
SR22 / SR22T
advisory since backup source is not available for comparison.
Flight Director, Autopilot and ESP will become available when
unreliable AHRS CB is pulled.
Roll Miscompare
ROLL MISCOMP Caution
For dual AHRS installations, roll (bank) difference is greater than 6°
between AHRS 1 and AHRS 2.
1. Roll........CROSS-CHECK AHRS1 against Stdby Attitude Indicator
2. AHRS2 .............................................................................. SELECT
a. Press SENSOR softkey on PFD, followed by AHRS2 softkey
b. Expect USING AHRS2 message on PFD
3. Roll........CROSS-CHECK AHRS2 against Stdby Attitude Indicator
4. AHRS .......................................................... SELECT more reliable
a. Press SENSOR softkey, then select the AHRS that provided
the most reliable roll indication
5. UNRELIABLE AHRS CIRCUIT BREAKER............................ PULL
Pulling circuit breaker for unreliable AHRS will clear miscompare
condition, but will result in 'NO PIT/ROLL/HDG COMPARE'
advisory since backup source is not available for comparison.
Flight Director, Autopilot and ESP will become available when
unreliable AHRS CB is pulled.
Autopilot Miscompare
AP MISCOMP Caution
Autopilot miscompare, Autopilot is not available.
1. Continue flight without Autopilot or isolate and remove the
unreliable sensor to clear the MISCOMP as described for ROLL or
PIT MISCOMP checklists to restore the autopilot.
P/N 13772-135
Revision 03: 12-14-10
ROLL MISCOMP
AP MISCOMP
Section 9
Supplements
7 of 30