Kms 540 lateral mode selection – BendixKing KFC 500 User Manual

Page 14

Bank Angle Limit Presentation

HDG (heading select)

Depressing the HDG pushbutton

on the mode select panel activates
Heading Select mode. The Heading
mode will provide flight director com-
mands to track the heading bug on
the EHSI. The heading lamp on the
mode select panel illuminates and
“HDG” is displayed on the EADI
when the heading select mode is
activated. Activating Heading Select
cancels any other lateral tracking
mode. If the Heading Select mode is
active, depressing the HDG pushbut-
ton will deactivate the the Heading

Select mode and revert the flight
director commands to maintain a roll-
level attitude that maintains the heli-
copter's present heading, the default
mode. Flashing of the annunciator
lamp indicates loss of a sensor
required to hold the selected heading
(e.g. invalid magnetic heading,
invalid selected heading). The lamp
continues flashing until a second
push of the HDG pushbutton (pilot
acknowledgement of mode loss) or
until another lateral mode is acti-
vated.

BL (bank angle limit)

This pushbutton allows the pilot to
select the maximum commanded

bank angle to be used during the
non-approach phases of flight. The
Bank Angle Limit mode allows the
maximum commanded bank angle to
be 25°, 20°, 15°, or 10°. The value
for the Bank Angle Limit is achieved
by cycling the pushbutton until the
desired value is displayed on the
EADI. If the default value, 20°, is
selected, the selected value declut-
ters on the EADI. The default value,
20°, is obtained at power-up if no
action is taken by the pilot to select
another value.

In the coupled approach phases

of flight, bank angle limiting is dis-
abled to provide optimum flight per-
formance. When coupled with the
Approach mode Armed, all captures
are made with a maximum bank
angle of 20°. If lesser bank angles
are required, the pilot may use the
heading select mode (move the
heading bug slowly) to capture the

KMS 540 Lateral Mode Selection

HDG

☛

TST

BRT

1
2

SYNC

REF

DIR

A
V

A
R
C

H
S

ADF 2

CRS

359

12.6

11.

360°

☛

NAV

BL10

HDG

Heading Select Bug

Heading Select Knob