ALL | BASIC | 2............1
(2) FCC
-109 -136
~...............
GUN 001-010 | BASIC | | 101-107, | | | 206 | | |
GUN 011-099, | | BASIC | 108-199, | | | 207-999 | | |
2.......….......1
C. Components (Fig. 1)
(1)
The AFDS has three digital Flight Control Computers (FCCs) and one Autoflight Control Systems (AFCS) Mode Control Panel (MCP). The system is capable of providing autopilot/flight director guidance and control for Autoland Category III operations.
(2)
The left, center, and right (L, C, and R) FCCs contain all logic and signal handling circuitry for pitch, roll, and yaw axis control. Yaw control is used only during an automatic landing and rollout.
(3)
Each FCC provides Autopilot (A/P) command output signals which drive hydraulic servos that deflect control surfaces. Each FCC also provides Flight Director (F/D) output signals for steering commands and mode annunciator's displayed on the Electronic Attitude Director Indicators (EADIs).
(4)
The primary digital interface between the AFDS and associated sensor systems uses the ARINC 429 Digital Information Transfer System (DITS).
(5)
The AFDS flight deck components (Fig. 2) are located as follows:
(a)
Mode Control Panel - center glare shield, P55 panel
(b)
Autoland Status Annunciator - Captain's P1-3 panel and First Officer's (F/O) P3-1 panel.
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Page 2
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757 MAINTENANCE MANUAL
RIGHT AUTOLANDSTATUSANNUNCIATOR
LINKAGETORUDDERCONTROLSYSTEM
Autopilot Flight Director System
Figure 1 (Sheet 1)
D01502
A
757
MAINTENANCE MANUAL
A71197
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757 MAINTENANCE MANUAL
CONTROL STAND, P10
THRUST LEVERS CIRCUIT BREAKER PANEL, P11
. GO AROUND SWITCHES . AUTOFLIGHT SYSTEM
CIRCUIT BREAKERS
CAPTAIN'S PANEL, P1-3
. A/P DISC RED LIGHT
GLARESHIELD, P55. A/P AMBER CAUTION LIGHT . MODE CONTROL PANEL
. CAPT'S AUTOLAND STATUS
ANNUNCIATOR
CONTROL WHEEL
. A/P DISENGAGE SWITCH
CONTROL WHEEL . A/P DISENGAGE SWITCH
FIRST OFFICER'S PANEL, P3-1 . F/O'S AUTOLAND
STATUS ANNUNCIATOR
UNDER CABIN FLOOR
. ROLL AND PITCH FORCE
TRANSDUCERS
A/P ROLLOUT GUIDANCE
1
SERVOS (LEFT, CENTER,RIGHT)
FLIGHT COMPARTMENT
A/P PITCH SERVOS AND ELEVATOR NEUTRAL SHIFT LINEAR TRANSDUCERS
A/P LATERAL CONTROL SERVOS
RACKS 2-1,2-2,2-3
. FLIGHT CONTROL
COMPUTERS
RIGHT, LEFT,
AND CENTER
FWD
1 AIRPLANES WITH CONTROL WHEEL STEERING
Autopilot Flight Director System - Component Location Figure 2
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757 MAINTENANCE MANUAL
(c)
A/P DISC red warning light - P1-3.
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