-Body Gear Steering actuators - Supplies a signal when the body gear is centered
-Landing Gear Lever Switch - Supplies a signal when the landing gear lever is in the DOWN position
-
Hydraulic System 1 Pressure - Supplies a signal when the pressure is low
-
Hydraulic System 4 Pressure - Supplies a signal when the pressure is low.
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A
747-400 MAINTENANCE MANUAL
S396 NG UP S397 NG LOCK
S753 PRI LDG LVR DN
S411 NG UP S424 NG LOCK
S753 PRI LDG LVR DN
NOSE SQUAT - ALTERNATE
1 SUPPLIES DISCRETE OUTPUT DRIVER
PSEU Logic Diagram Figure 3 (Sheet 1)
NOSE GEAR UP & LOCK
NOSE GEAR DOWN & LOCK
NOSE GEAR POSN DISAGREE NOSE GEAR NOT DOWN AND LOCKED
NOSE GEAR UP & LOCK
NOSE GEAR DOWN & LOCK
NOSE GEAR POSN DISAGREE
NOSE GEAR NOT DOWN AND LOCKED
1
1
1
1
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A
747-400
MAINTENANCE MANUAL
B
S753 PRIMARY LVR DN
INPUTS OUTPUTS
A
UP
C
DN
D
WING AND BODY GEAR INDICATION - PRIMARY
GEAR INPUTS OUTPUTS
POSITION UP DN A B C D
LWG S398 S399 LWG UP UP DISAGREE DN DISAGREE LWG DN
LBG S400 S401 LBG UP UP DISAGREE DN DISAGREE LBG DN
RBG S402 S403 RBG UP UP DISAGREE DN DISAGREE RBG DN
RWG S404 S405 RWG UP UP DISAGREE DN DISAGREE RWG DN
WING AND BODY INDICATION-PRIMARY
PSEU Logic Diagram
Figure 3 (Sheet 2)
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747-400 MAINTENANCE MANUAL
INPUTS OUTPUTS UP
A
B S753 ALTERNATE LVR DN
C
DN
D
WING AND BODY GEAR INDICATION - ALTERNATE
GEAR INPUTS OUTPUTS
POSITION DNUP A B C D
LWG S1638 S415 LWG UP UP DISAGREE DN DISAGREE LWG DN
LBG S1636 S414 LBG UP UP DISAGREE DN DISAGREE LBG DN
RBG S1637 S413 RBG UP UP DISAGREE DN DISAGREE RBG DN
RWG S1639 S412 RWG UP UP DISAGREE DN DISAGREE RWG DN
WING AND BODY INDICATION - ALTERNATE
PSEU Logic Diagram
Figure 3 (Sheet 3)
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747-400
MAINTENANCE MANUAL
S417 LWG TRK TILT
S401 LBG DN S419 LBG TRK TILT
S418 RBG TRK TILT S4O3 RBG DOWN
S416 RWG TRK TILT HYD SYS #4 PRESS
HYD SYS #1 PRESS
S800 NOSE GEAR NOT COMPRESSED
S615 LWG TRK TILT
S414 LBG DOWN S612 LBG TRK TILT
S613 RBG TRK TILT S413 RBG DOWN
S614 RWG TRK TILT PRESS HYD SYS 4B PRESS HYD SYS 1B
S801 NOSE GEAR NOT COMPRESSED
LANDING GEAR POSITION INDICATION & CONTROL - ALTERNATE
SUPPLIES DISCRETE OUTPUT DRIVER
PSEU Logic DiagramFigure 3 (Sheet 4)
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本文链接地址：747-400 AMM 飞机维护手册 起落架 LANDING GEAR 1(44)
