Integrated Avionics System Emergencies; Attitude & Heading Reference System (Ahrs) Failure; Air Data Computer (Adc) Failure; Pfd Display Failure - Cirrus SR22 Pilot's Operating Handbook And Flight Manual

Cirrus Design
SR22

Integrated Avionics System Emergencies

A "Red X" through any electronic display field, such as COM
frequencies, NAV frequencies, or engine data, indicates that display
field is not receiving valid data.
Attitude & Heading Reference System (AHRS) Failure
1. Verify Avionics System has switched to functioning AHRS
If not, manually switch to functioning AHRS and attempt to bring
failed AHRS back on-line:
2. Failed AHRS Circuit Breaker.................................................... SET
If open, reset (close) circuit breaker. If circuit breaker opens again,
do not reset.
3. Be prepared to revert to Standby Instruments (Altitude, Heading).
Amplification
Failure of the Attitude and Heading Reference System (AHRS) is
indicated by removal of the sky/ground presentation and a "Red X" and
a yellow "ATTITUDE FAIL" shown on the PFD. The digital heading
presentation will be replaced with a yellow "HDG" and the compass
rose digits will be removed. The course pointer will indicate straight up
and course may be set using the digital window.

Air Data Computer (ADC) Failure

1. ADC Circuit Breaker................................................................. SET
If open, reset (close) circuit breaker. If circuit breaker opens again,
do not reset.
2. Revert to Standby Instruments (Altitude, Airspeed).
3. Land as soon as practical.
Amplification
Complete loss of the Air Data Computer is indicated by a "Red X" and
yellow text over the airspeed, altimeter, vertical speed, TAS and OAT
displays. Some FMS functions, such as true airspeed and wind
calculations, will also be lost.

PFD Display Failure

1. Display Backup .............................................................. ACTIVATE
2. Land as soon as practical.
P/N 13772-004 P/N 13772-004

Original Issue

Section 3
Emergency Procedures
3-29 3-29