22-14-00
ALL ú ú 08 Page 13 ú Jan 28/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
A71083
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù.
GUN 001-050, 052-999 ú 22-14-00
ú ú 10 Page 14 ú Jan 28/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
ASA STATUSLAND 2SELF TEST ALAND 3SELF TEST B
STATUS
DC GND FULL TIME MANUAL LND SAME AS
(OPTION)
NO LAND MANUAL CAPTAIN'S
SELF TEST E
LND ASA
C MANUAL LND SELF TEST D
R MANUAL LND
SQ
NO LAND 3 C NO LAND 3
28V DC POWER
R NO LAND 3
R 28V
28V DC BAT.DC R MCPRAD ALT >100 FT
MODE CONTPNL R1 OR MORE CHANL TMC
ENGAGE IN CMD
R FCC
F/O AUTOLAND STATUS
NO
C FCC 28V DCANNUNCIATOR
LAND 3
L FCC
STBYBUS
1 28V DC BAT.
AUTOFLIGHT
C AUTOLAND 3
WARN
R AUTOLAND 3
MCP
28V
28V DC POWER
DC L
AUTOLAND
IN AIR MODE CONT ASA STATUS
3
STAB TRIM XFR
PNL L
APPROACH OPER
STATUS
C AUTOLAND 2
P11
LAND 2
(TOP DISPLAY)R AUTOLAND 2 AUTOLAND 2
SELF TEST A
AUTOLAND
(OPTION)
OPTIONAL ASA
2
METHOD II
(OPTION) LAND 3SELF TEST B
DATA MANAGEMENT AUTOLAND 3 FROM
1
POWER
OTHER D
MONITOR
FCC'S A
TEST TA COMPUTER
MANUAL LAND DC GND
2
NO LAND 3
MONITOR
M
A
N
AUTOLAND 3 A
TO R FCC
CROSS MANUAL LND
G 429
(BOTTOM DISPLAY)E XMTR
CHANNEL SELF TEST E
BUS
AUTOLAND 2
TO C FCC
MANUAL LNDEM
SELF TEST D
OWN AUTOLAND
N
NO LAND 3
STATUS
T
DETERMINATION
SOFTWARE
NO LAND 3HARDWARE 1 FCC SOFTWARE INHIBITS THE "NO LAND 3" OUTPUTWHEN FCC OPTION 2 (OPTIONAL ASA) AND METHOD II
1 L FLIGHT CONTROL COMPUTER (TYPICAL) ARE SELECTED
CAPTAINS AUTOLAND STATUS ANNUNCIATORAFCS Autoland Status Annunciator Signal Development and Control SchematicFigure 8 (Sheet 2)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. GUN 051 ú
22-14-00
ú ú 11 Page 15 ú Jan 28/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A71086
A
(b)
(c)
(d)
(e)
(f)
757 MAINTENANCE MANUAL
GUN 001-050, 052-999;
LAND 3
1) The LAND 3 display is enabled only when the approach mode is operational. The display requires that all three FCCs have determined LAND 3 is valid. LAND 3 is valid when the FCCS, A/P servos, and outer loop data are normal. The display latches at 200 ft. of radio altitude.
GUN 051;
AUTOLAND 3
1) The AUTOLAND 3 display is enabled only when the approach mode is operational. The display requires that all three FCCs have determined AUTOLAND 3 is valid. AUTOLAND 3 is valid when the FCCs, A/P servos and outer loop data are normal. The display latches at 200 ft. of radio altitude.
GUN 001-050, 052-999;
NO LAND 3
1) The NO LAND 3 display is enabled during the entire flight. The NO LAND 3 is displayed when one or more of the FCCs determine a NO LAND 3 status exists. This display is inhibited below 200 ft. unless already displayed, or no FCC is in the CMD mode. Transfer of the automatic stabilizer trim function from the first channel in command to another channel causes NO LAND 3 to be displayed after touchdown. When the P/RST switch is pressed, the reset flip-flop is set. This clears the display if the fail status is corrected.
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