Pilot's Operating Handbook
Section 3
Emergency procedures
EASA Approved
Edition 0 - March 05, 2019
Rev. 0
Page 3.12.29
AHRS failure
1/2
Symptoms : Autopilot is disconnected
-
On PFD(s) : Comparator window
HDG
and/or
PIT
and/or
ROL
annunciation(s)
,
-
On PFD(s) : Reversionary sensor window
BOTH ON AHRS1
or
BOTH ON AHRS2
annunciation
.
Lost systems :
-
AHRS1 or AHRS2
,
-
Autopilot (AP)
.
Systems still operative :
-
Flight Director (FD), when engaged again,
-
Autothrottle remains engaged or may be engaged.
Actions :
Autopilot is not operative.
1 -
AHRS1 and/or AHRS2 breaker
Check pushed
. . . . . . . . . . . . . . . . . . . . . . . . .
If
BOTH ON AHRS1
or
BOTH ON AHRS2
annunciation is associated to
HDG
and/or
PIT
and/or
ROL
annunciation(s) :
2 -
Fly the airplane manually.
If pilot wishes :
3 -
FD default mode
Engage
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PIT and ROL
4 -
FD specific modes
Engaged as desired
. . . . . . . . . . . . . . . . . . . .
HDG, NAV, ALT, …
5 -
Fly the airplane manually to follow Command Bars.
End of procedure
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PIM - DO NOT USE FOR FLIGHT OPERATIONS