CAS Advisory Message
Meaning, Effects and Possible Actions
YD Fail
Yaw Damper has failed below 15,500 ft PA.
Minimize sideslip by using rudder pedals and manual rudder
trim.
Above 15,500 ft PA, refer to the
procedure.
Reset the AFCS as follows:
Open the A/P SERVO (Avionic 1 Bus
L
Z2) and A/P SERVO
ENABLE (Avionic 1 Bus
L
Y2) circuit breakers for 2 secs, then
close. Check CAS. Only one reset attempt per flight.
AP Fail
Autopilot is not available.
Reset the AFCS as follows:
Open the A/P SERVO (Avionic 1 Bus
L
Z2) and A/P SERVO
ENABLE (Avionic 1 Bus
L
Y2) circuit breakers for 2 secs, then
close. Check CAS. Only one reset attempt per flight.
FD Fail
Flight Director is not available
Reset the AFCS as follows:
Open the A/P SERVO (Avionic 1 Bus
L
Z2) and A/P SERVO
ENABLE (Avionic 1 Bus
L
Y2) circuit breakers for 2 secs, then
close. Check CAS. Only one reset attempt per flight.
AFCS Fault
Fault detected in the AFCS system.
Reset the AFCS as follows:
Open the A/P SERVO (Avionic 1 Bus
L
Z2) and A/P SERVO
ENABLE (Avionic 1 Bus
L
Y2) circuit breakers for 2 secs, then
close. Check CAS. Only one reset attempt per flight.
All on together:
FD Fail
AP Fail
YD Fail
Reset the AFCS as follows:
Trim the aircraft straight and level. Wait two minutes. If the
CAS messages go off, re-engage autopilot.
ADAHRS reset can only be achieved in stable pitch and no
bank condition, also only light turbulence. Only one reset
attempt per flight.
If the CAS messages stay on or recur, trim the aircraft
straight and level with autopilot and yaw damper disengaged.
Open the ADAHRS CH B circuit breaker (Main Bus
R
M1),
wait 5 seconds then close the circuit breaker. Wait two
minutes. If the CAS messages go off, engage the autopilot.
If the CAS messages reoccur, and autopilot is required for
continued safe flight, open the ADAHRS CH B circuit breaker
(Main Bus
R
M1) and leave open for the rest of the flight.
*
*
FMS Fail
, or
FMS1+2 Fail
(if dual
FMS installed)
Flight management System is not available, use remaining
operational navigation equipment as required. The CPCS will
use the default Landing Field Elevation (LFE) of 10,000 ft to
determine the target cabin altitude. Therefore, the flight crew
must manually re-select the LFE early enough to prevent
over or under pressurization. Alternatively, the CPCS
SYSTEM MODE switch may be selected to MANUAL for
manual control of the cabin altitude.
FMS1 Fail
, or
FMS2 Fail
If required use the NAV source select button on the PFD
Controller to select the cross-side FMS for navigation.
Section 3A - Abnormal Procedures (EASA Approved)
CAS Advisories
Pilot's Operating Handbook
Report No: 02406
Issue date: Mar 06, 2020
Page 3A-2-2
12-C-A15-48-0302-00A-014A-A
FOR
GENERAL
AND
FAMILIARIZATION
PURPOSES
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