King Air C90GTi, Pilot Training Manual

Page: 420 / 557

Figure 16-156. ELT Manual Switch
TERRAIN AWARENESS
AND WARNING SYSTEM
(TAWS+)
The Aviation Communication and Surveillance
Systems (ACSS) TAWS+ system uses a Ground
Collision Avoidance Module (GCAM) to pro-
vide both predictive and reactive alerts. These
alerts consist of visual and aural cautions and
warnings to the pilot of potential collision with
terrain or obstructions, other potentially unsafe
conditions, as well as altitude awareness call-
outs. The TAWS+ has two areas of operation:
basic ground proximity (reactive) and en-
hanced ground proximity (predictive).
BASIC GROUND PROXIMITY
WARNINGS (REACTIVE)
The following operating modes generate cau-
tions and warnings that are part of the basic
ground proximity warnings. The cautions will
generate a “GND PROx” PFD message while
the warning will generate a “PULL UP” PFD
message (Figure 16-157). Each caution and
warning is also accompanied by an aural com-
mand as shown in the following table. This
portion of the TAWS+ system is solely related
to the radio altimeter. If the radio altimeter
were to fail an appropriate TAWS annuncia-
tor would appear on the PFDs indicating that
the basic ground proximity modes are inoper-
ative (Figure 16-158).
Figure 16-157. PFD GND PROX and PULL
UP Annunciators
Figure 16-158. TAWS Failure Annunciators
Collins
10
10
20
APPR FMS VGP
3
000
6
60
540
20
400
600
700
1
2
4
4
2
1
30.16IN
251
W
24
<
4000
R
TOD
185
180
160
120
DN
100
14 1
0
1000
GND PROX
700
Collins
10
10
20
APPR FMS VGP
3
000
6
60
540
20
400
600
700
1
2
4
4
2
1
30.16IN
251
W
24
<
4000
R
TOD
185
180
160
120
DN
100
14 1
0
1000
PULL UP
550
Collins
10
10
20
APPR FMS VGP
3
000
6
60
540
20
400
600
700
1
2
4
4
2
1
30.16IN
251
W
24
4000
R
TOD
185
180
160
120
DN
100
14 1
0
1000
RA
GWPS
16-87
FOR TRAINING PURPOSES ONLY
KING AIR C90GTi/C90GTx PILOT TRAINING MANUAL
16
A
VIONICS