Power Application And Preflight Tests; Kfc 225 System Operation; Controls And Displays Operation - Honeywell Bendix/King KFC 225 Pilot's Manual

Introduction

Power Application and Preflight Tests

YD
G
P R
AP HDG
FD NAV
KFC 225 Preflight Test
YD
G
P R
AP FD HDG NAV
KFC 225 Preflight Test Complete
A preflight test is performed
upon power application to the com-
puter. This test is a sequence of
internal checks that validate proper
system operation prior to allowing
autopilot engagement. The preflight
test (PFT) sequence is indicated by
"PFT" with an increasing number for
the sequence steps. Successful
completion of self test is identified by
all display segments being illumi-
nated (Display Test), the Flight
Director command bars brought into
view and the disconnect tone sound-
ing.
4
KFC 225 AUTOMATIC FLIGHT CONTROL SYSTEM
ARM VS
UP
APR REV ALT DN
KFC 225
ARM VS
UP
APR REV ALT DN
KFC 225
NOTE: Following the preflight test,
the red P warning on the face of the
autopilot may illuminate indicating
that the pitch axis cannot be
engaged. This condition should be
temporary, lasting no more than 30
seconds. The P will extinguish and
normal operation will be available.

KFC 225 System Operation

Controls and Displays Operation

1
1.
TOR - When illuminated, indicates
failure of the pitch axis and will lead
to disengagement of the autopilot.
(Will also illuminate during short term
vertical accelerations in excess of
+1.6g or less than +0.4g which may
not cause autopilot disengagement.)
2.
TOR - When illuminated, indicates
failure of the roll axis and will disen-
gage the autopilot.
3.
GAGE (AP) BUTTON - When
pressed, engages the flight director,
autopilot and yaw damper (if
installed). If the flight director is not
already engaged, the system will
engage into the basic wings level
(ROL) and pitch (PIT) attitude hold
modes. The pitch attitude main-
tained will be the pitch attitude pre-
sent at the moment of AP button
press. When pressed again, will dis-
engage the autopilot.
Rev. 0 Rev. 0
Apr/99 Apr/99
18 17 16
YD
G
P R
AP APR
FD HDG NAV
2 3 4 5 6 7
Full KFC 225 Three-Axis with Altitude Preselect Display
PITCH AXIS, (P) ANNUNCIA-
ROLL AXIS (R) ANNUNCIA-
AUTOPILOT ENGAGE/DISEN-
KFC 225 AUTOMATIC FLIGHT CONTROL SYSTEM
System Operation
15 14 13 12
VS
ARM
UP
REV
ALT DN
KFC 225
8 9 10 11
4. FLIGHT DIRECTOR (FD)
MODE SELECTOR BUTTON –
When pressed will engage the flight
director into the basic roll (ROL)
mode which functions as a wing lev-
eler, and into the pitch attitude (PIT)
hold mode. The pitch attitude main-
tained will be the pitch attitude pre-
sent at the moment of FD button
press. When pressed again (and the
autopilot is not engaged) will disen-
gage the flight director.
5. HEADING (HDG) MODE
SELECTOR BUTTON - When
pressed, will engage the Heading
mode, which commands the airplane
to turn to and maintain the heading
selected by the heading bug on the
HSI. A new heading may be
selected at any time and will result in
the airplane turning to the new head-
ing. Button can also be used to tog-
gle between HDG and ROL modes.
This button will engage the flight
director.
5