Localizer back course approach, Operational examples – BendixKing KFC 500 User Manual
Page 40
Operational Examples
70
March 27, 1998
006-18081-0000
71
006-18081-0000
June 15, 1999
Localizer Back Course Approach
Objective: Fly outbound on the localizer, complete a procedure turn and fly
the localizer back course approach to the airport.
1.
In heading select and the desired pitch mode with the localizer fre-
quencey selected as the active navigation receiver, the aircraft is flying 45° to
intercept the localizer. The localizer front course of 090° is selected with the
EHSI course knob. Remember that the course pointer is always selected to
the inbound heading for the localizer front course to obtain correct “fly to” indi-
cations on the EHSI.
As the aircraft nears the localizer, the APR push button is depressed to arm
the approach mode so the localizer will be captured and tracked. The capture
point computation is based on deviation and deviation rate of change.
1
N
2
3
4
090
°
45
°
135
°
5
045
HDG
045
090
L
O
C
1
1 2 . 6
NM
117.95
CRS
H
AP
HDG
ALT
RA
DH
2500
500
LOC
20
20
20
20
10
10
10
10
N
33
30
W
24
21
S
15
12
E
6
3
LOC
3000 FT
G
G
Note: Always set the navigation course pointer to the inbound heading for
the localizer front course. This course will be opposite the helicopter heading
when inbound on a back course approach.
2.
When the computed capture point is reached, the approach mode is
automatically coupled (LOC turns from white to green) and a right turn out-
bound on the localizer is commanded by the flight director and satisfied by the
autopilot.
Note: The KFC 500 Autopilot/ Flight Director will only maintain one pitch
mode at a time (pitch attitude hold, altitude hold, vertical speed hold, go
around, indicated airspeed hold, or glideslope). As an example, if the AFCS is
coupled to vertical speed then
the pilot must manually main-
tain airspeed with the collec-
tive.
3.
Prior to the procedure
turn, the heading bug is posi-
tioned to 135° which is the 45°
initial procedure turn heading.
At the point where the proce-
dure turn is to be initiated,
depress the HDG push button
to engage heading select
mode and the autopilot will
turn the aircraft to the direction
of the heading bug (135°).
During the procedure turn out-
bound, the deviation bar
shows pictorially the helicopter
flying away from the localizer
centerline at a 45° angle.
135
HDG
135
090
L
O
C
1
1 7 . 2
NM
117.95
CRS
H
AP
HDG
ALT
RA
DH
2500
500
LOC
20
20
20
20
10
10
10
10
N
33
30
W
24
21
S
15
12
E
6
3
3000 FT
G
G