A
BLANK FACE A BOTH BLOCKS TO SHOW
FACE B
BLOCK PIVOT CAUSES ROTATION OF PTT 2 SW PRESSED
(EXAMPLE) BOTH BLOCKS TO SHOW FACE B
SYSTEM STATUS DISPLAY
READS OUT DEGRADATION
ON GROUND OF AUTOLAND STATUS
(NON-LATCHING)
READS OUT DEGRADATION
IN ROUTE OF AUTOLAND STATUS (LATCHING UNTIL MANUAL
RESET OR APPROACH)
AT APPROACH SELECT AUTOMATIC RESET PULSE READS OUT CURRENT AUTOLAND SYSTEM STATUS (LATCHING UNTIL MANUAL RESET)
READS OUT CURRENT
APPROACH AUTOLAND SYSTEM STATUS ABOVE ALERT HEIGHT
(LATCHING UNTIL MANUAL RESET)
Autoland Status Annunciator
Figure 4 (Sheet 1)
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MAINTENANCE MANUAL
PTT 1 SW PRESSED CAUSES ROTATION OF
A
BLANK FACE A BOTH BLOCKS TO SHOW
FACE
B
BLOCK PIVOT CAUSES ROTATION OF PTT 2 SW PRESSED
(EXAMPLE) BOTH BLOCKS TO SHOW FACE B
SYSTEM STATUS DISPLAY
AT APPROACH SELECT AUTOMATIC RESET PULSE READS OUT CURRENT AUTOLAND SYSTEM STATUS (LATCHING UNTIL MANUAL RESET)
READS OUT CURRENT
AUTOLAND SYSTEM STATUS
APPROACH ABOVE ALERT HEIGHT
(LATCHING UNTIL MANUAL RESET)
SYSTEM CONFIGURATION DISPLAY
FAIL OPERATION BLANK (GREEN) A (BLACK) AUTOLAND 3
FOLLOWING 1ST FAIL (FAIL PASSIVE) BLANK AUTOLAND 2 (WHITE) B (BLACK)
SINGLE CHANNEL OPERATION AFTER 2ND FAIL BLANK (BLACK) MANUAL LND (AMBER) B
Autoland Status Annunciator
Figure 4 (Sheet 2)
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(2)
Caution Light
(a) The AUTOPILOT caution light is a dual-lamp indictor controlled by a single output from the FCCs. The lamps use 28 vdc power. The color of the indicator is amber.
(3)
Warning and Caution Annunciations
(a) The EICAS computer receives a ground from the FCCs when an autopilot disengage or autopilot failure occurs. This ground causes the EICAS computer to display a red AUTOPILOT DISC or amber AUTOPILOT message (Ref 31-41-00).
3. Operation_________
A. Functional Description
(1) EADI AFDS Status and Roll Mode Annunciation Signals (Fig. 6)
(a) Status Annunciation
1) Autopilot status messages are sent from the FCC that has an autopilot or flight director channel engaged. The following signals are supplied by the FCC: a) CMD ENGAGE b) FLT DIR ON - CAPT c) FLT DIR ON - F/O
EICAS DISPLAY
Autopilot Warning and Caution Annunciations Figure 5
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L FCC (TYP)
EADI AFDS Status and Roll Mode Annunciation Signals
Figure 6 (Sheet 1)
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MAINTENANCE MANUAL
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