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desired track.
DESIRED TRACK
DESIRED TRACK
N
6
33
W
24
21
15
30
12
3
S
E
GF0410_057
AUTOMATIC FLIGHT CONTROL SYSTEM
Flight Crew Operating Manual REV 41, Jul 08, 2004
CSP 700−6
Volume 2
04−10−20
LATERAL NAVIGATION MODES (CONT'D)
Back Course (BC) Mode
Back course mode provides for automatic intercept, capture and tracking of the back course
localizer signal.
When BC is armed, BC HDG is automatically active
HDG AP1 ALT
BC .
BC mode is identical to APR mode except that the transmitter is located 2000 feet in front of the
touchdown
point. The course arrow must be set to the front course runway heading. The FGC will
invert the course and radio deviation signals to provide correct back course steering commands.
HDG
BC Armed.
BC
Active. “BC” will flash for approximately 5 seconds, when active.
AUTOMATIC FLIGHT CONTROL SYSTEM
REV 41, Jul 08, 2004 Flight Crew Operating Manual
CSP 700−6
Volume 2
04−10−21
LATERAL NAVIGATION MODES (CONT'D)
Back Course (BC) Mode (Cont’d)
HDG
330
090°
INBOUND
COURSE
LOCALIZER
TX
TYPICAL
CAPTURE
POINT
BACK COURSE MODE INTERCEPT
HDG
330
RUNWAY
330°
BC AP1 ALT
HDG
330
CRS
090
CRS
090
CRS
090
BACK COURSE MODE CAPTURE BACK COURSE MODE TRACK
N
6
33
E
W
24
21
s
15
30
12
3
N
6
33
E
W
24
21
s
15
30
12
3
N
6
33
E
W
24
21
s
15
30
12
3
GF0410_062
AP1
20 20
HDG ALT
BC
20 20
AP1
20 20
BC ALT
20 20
10
20 20
10
10 10
20 20
AUTOMATIC FLIGHT CONTROL SYSTEM
Flight Crew Operating Manual REV 41, Jul 08, 2004
CSP 700−6
Volume 2
04−10−22
MODES OF OPERATION: (VERTICAL)
The following are vertical modes of operation:
Pitch Hold (PIT)
PIT mode is automatically selected when no other vertical mode is active and the autopilot is
engaged and if ROL mode is active and no vertical mode is active. If the pitch angle is greater
than 20°, pitch hold mode will reduce the airplane pitch angle to ±20°. PIT reference is modifiable
(within pitch limits), via pilot inputs to the pitch thumbwheel,
or by TCS. There is no speed
protection in PITCH mode.
The pitch hold mode holds a flight path angle rather than a fixed pitch angle. The selected flight
director pitch angle will change with altitude, configuration and/or airspeed changes, while
climbing, descending or in level flight.
PIT mode is annunciated in the vertical capture field on the PFD. Pitch mode is cleared by
selecting another vertical mode. PIT will flash for 5 seconds, when active.
GF0410_063
0.88 AP1 300 00
20 20
220
210
23500
ROL PIT
AP
Vertical Speed (VS) Select
VS mode is used to maintain a pilot selected vertical speed reference. FGC will generate pitch
commands to align the airplane vertical rate displayed on the PFD. The airplane vertical rate is
adjustable via the pitch wheel. The pilot may select another vertical speed reference without
cancelling VS mode by depressing the TCS button and maneuvering the airplane to another
vertical speed.
GF0410_064
VNAV
VS
PITCH
WHEEL TOUCH CONTROL
STEERING
DN
UP
FGC will not generate commands to exceed Vmo or Mmo when in VS mode. When a potential
overspeed condition is detected, VS flight director pitch commands will be limited to 3 knots less
than Vmo or Mmo and MAX SPD annunciation is displayed on the PFD and an aural warning is
activated.
A − chord
GF0410_065
0.94
MAX
SPD
320
310
300
290
280
270
285
6
4
VERTICAL SPEED
TARGET READOUT
When VS mode is active, the pitch angle is limited to ±20°. The vertical speed commands are from
−8000 feet/minute to +6000 feet/minute.
AUTOMATIC FLIGHT CONTROL SYSTEM
REV 41, Jul 08, 2004 Flight Crew Operating Manual
CSP 700−6
Volume 2
04−10−23
MODES OF OPERATION: (VERTICAL) (CONT'D)
Vertical Speed (VS) Select (Cont’d)
VS mode is activated by selecting VS on guidance panel. VS mode is annunciated in the
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