King Air C90GTi, Pilot Training Manual

Page: 359 / 557

Figure 16-50. ADC Switch - ADC2 Selected
AHRS Reversion
The Attitude Heading Reference System
(AHRS) switch on the reversionary control
panel provides reversion capabilities for the
AHRS. If a single AHRS fails, the red HDG
and ATT flags will appear on the affected PFD
and a white xAHS flag will appear on the
cross-side PFD (Figure 16-51). The AHRS
switch should then be moved to the operating
AHRS (e.g., if AHRS2 is still working, choose
AHRS2).
Miscompare indications also require the use of
AHRS reversion. This occurs when the pilot
and copilot systems are still functional but
<
140
80
60
TERM
ACC -.02
T
ADC2
V
2
V
R
V
1
110
93
93
FOR TRAINING PURPOSES ONLY
16-26
KING AIR C90GTi/C90GTx PILOT TRAINING MANUAL
16
A
VIONICS
Figure 16-51. AHRS1 Failure
Collins
BRT
DIM
14
000
6
60
540
20
400
600
700
1
2
4
4
2
1
30.16IN
<
PRESET
VOR1
FORMAT
FMS
DTK 251
(6935)
0.
8NM
25
W
30
24
21
ATC1 UTC RAT COM1 COM2 121.800 4336 125.250 14:41 15 o C
<
<
140
80
60
6935
RDR
<
TERR
<
ET
TERM
F
50
ACC -.--
TERRAIN
0
RADAR ON
TCAS OFF
ATT
HDG
HDG PTCH
ALTS FMS
V
2
V
R
V
1
110
93
93
Collins
BRT
DIM
10
10
20
HDG PTCH
ALTS
14
000
6
60
540
20
400
600
700
1
2
4
4
2
1
30.16
IN
<
PRESET
VOR1
FORMAT >
FMS
DTK 251
(6935)
0.
8NM
ATC1 UTC RAT COM1 COM2 121.800 4336 125.250 14:41 15 o C
<
140
80
60
6935
<
ET
TERM
V
ACC -.02
0
FMS
21
24 w
30
33
N
3
6
E
12
15
S
251
4.
1NM
SXW
V
----
NM
SXW
RDR
TERR
XAHS
TFC >
FD
V
2
V
R
V
1
110
93
93
Pilot’s PFD Copilot’s PFD