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MAINTENANCE MANUAL
D. The autoland status annunciator, autopilot caution light, and A/P disconnect warning light are described in Autopilot/Flight Director Warning and Annunciator - Description and Operation (22-14-00).
E. The flight control computers digital cross channel data buses are described in Autopilot/Flight Director Interchannel Data - Description and Operation (22-15-00).
3. Operation
_________
A. Functional Description
(1)
General (Fig. 7)
(a) These AFDS configurations define, in parentheses, the type of guidance or control provided. Transition into and out of the ACTIVE configuration is possible as defined in the table. In multichannel engage operation, each FCC may be in a different configuration before all FCCs become CMD (ROLLOUT).
(2)
Single Channel Mode Functions (Fig. 8)
(a)
The table shows the basic control functions for modes which can be active during single channel operation. Simultaneous pitch and roll modes are those in which both pitch and roll control functions are enabled at mode selection. Pitch and roll axes control laws are not variable by pilot action.
(b)
Pitch and roll command and F/D modes may be independently selected and allow pilot control interface actions.
(3)
Flight Director Only Block Diagram (Fig. 9)
ENTRY CONFIGURATION ACTIVE CONFIGURATION EXIT CONFIGURATION
ARM, CMD, CWS 1 OFF (PITCH AND ROLL) ARM
OFF ARM (PITCH AND ROLL) OFF, CMD, CWS 1
ARM, CWS 1 CMD (PITCH AND ROLL) OFF, CWS 1
1 ARM, CMD CWS (PITCH AND ROLL) OFF, CMD
ARM (ROLLOUT), CMD (ROLLOUT) OFF (ROLLOUT) ARM (ROLLOUT)
OFF ARM (ROLLOUT) OFF, CMD (ROLLOUT)
ARM (ROLLOUT CMD (ROLLOUT) OFF
PITCH AND ROLL CONFIGURATIONS ARE APPLICABLE TO SINGLE CHANNEL COMMAND ENGAGE OPERATIONS. ROLLOUT CONFIGURATIONS ARE APPLICABLE TO MULTI-CHANNEL COMMAND ENGAGE OPERATIONS, PROVIDING PITCH, ROLL AND YAW CONTROL/GUIDANCE OUTPUTS FOR AUTOLAND APPROACHES.
1 AIRPLANES WITH CONTROL WHEEL STEERING
AFDS Configurations
Figure 7
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ANNUNCIATEDMODE ON FLIGHTCLASSIFICA-MODES FUNCTIONS MODETION ANNUNCIATOR
SIMULTANEOUS CONTROL
NO SERVO OR F/D COMMANDS. ALL CHANGES SYNCHRONIZE ___ PITCH AND ROLL
INACTIVE
ALL CHANNELS MONITORED FOR MODE ENGAGEMENT CAPABILITY MODES
TAKEOFF F/D ONLY MODE, AUTOMATICALLY SELECTED ON GROUND. ROLL F/D CMDS FOR WINGS LEVEL UNTIL LIFTOFF, THEN YES TRACK HOLD PITCH F/D CMDS FOR ROTATION ATTITUDE, THEN SAFE YES CLIMBOUT SPEED
GO AROUND
ROLL CMDS GROUND TRACK HOLD YES F/D OR CMD
PITCH CMDS FOR SAFE CLIMB RATE USING SPEED SCHEDULE YES
B/CRS MODE
INDEPENDENT OF A/P OR F/D EXCEPT AFTER LOC CAPTURE YES
PITCH MODES VERTICAL SPEED
BASIC F/D OR A/P CMD SELECTION MODE (F/D OR CMD)
CONTROLS TO SELECTED V/S YES
ALTITUDE ACTIVE ALTITUDE HOLD & ALTITUDE SELECT YES
FLIGHT LEVEL
CONTROLS TO IAS OR MACH SELECTED, DURING CLIMB OR CHANGE
DESCENT TO SELECTED ALTITUDE. PROVIDES FLAP PLACARD YES AND MINIMUM SPEED PROTECTION
VNAV MODE CONTROLS TO VERTICAL STEERING COMMANDS FROM FMC YES
GLIDESLOPE ACTIVE GLIDESLOPE CAPTURE & TRACK YES
ROLL MODES HEADING HOLD
BASIC F/D OR A/P COMMAND SELECTION MODE YES (F/D OR CMD) HEADING SELECT CONTROLS TO SELECTED HEADING YES
LNAV MODE CONTROLS TO HORIZONTAL (LATERAL) STEERING CMDS FROM YES FMC
LOC ACTIVE CAPTURE & TRACK LOCALIZER CENTERLINE YES
B/CRS LOC ACTIVE CAPTURE & TRACK BACKCOURSE LOCALIZER CENTERLINE YES
FUNCTION MAY INCLUDE ROLL ATTITUDE HOLD DEPENDING ON LATERAL CMD ENGAGE OPTION GUN 001-050,052-999
Single Channel Mode Functions
Figure 8
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