34-42-00

 FLAP AND GEAR INHIBIT  ú
 SWITCHES  ú  03  Page 5
 ú  Nov 12/01 

BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A10287
A 737-300/400/500MAINTENANCE MANUAL
GND PROX WARN
INHIBIT 115V AC
D1153 DCDETECTION
B3
D
GND OUT TEST
POWER
ELEC NO. 1 AIR MODE 1 WARNING
B4 PULL UP
ON MODES
SUPPLY WARN
ELASPED BRIGHT
B11
NO. 1 DATA CMPTR 1 DETECTOR
B61,2,3,4,
ENABLE
TIME IND F
AUTO XFMR INHIBIT DIM
WARNING
B5
CONTROL
26V AC

MODE 2 WARNING
ADC-1 ON
DETECTOR P18 LOAD CONTROL CENTER
AUTO
XFMR FLASHER A13 NC
A
MASTER DIM SWITCH (P2)B27 G
D309 28V DC INDICATOR LIGHTS
MODE 3 WARNING
X A14 A36 MACH

BARO VALID B42 DETECTOR EVENT
1
o o
Y A15 A37 NUMBER PUSH TO
AIRSPEED SIGNAL B25 NC
h B
Z A16 A38 PROCESSOR INHIBIT
CONTROL
DIFFERENTIATOR MODE 4 WARNING
BARO
3
o
H A60 B37
A A
DETECTOR DC
ALTITUDE h B
BARO RATE BELOW
C A61 B38
4
RATE G/S
B33
26V AC REF A38 B39
2
PROCESSOR hB
C
INTEGRATOR
L834 CAPT "BELOW G/S" LT (P1)B
MODE 5 WARNING
M196 ADC NO. 1 (E1-1) DETECTOR "GLIDE SLOPE"
D101B16 F
2
F/T IN B24

hR AUDIO
RR
3
GENERATOR
AUX DC SIGNAL DIFFER-
B47 +B20 MODE 1
ALTITUDE
4
LINEARIZER ENTIATOR o
B46 -B21 CONTROL
RADIO
1
h R "WHOOP-WHOOP
ALTIMETER VALID B12 MODE 2
GLIDE SLOPE PULL UP" L812 CAPT "PULL UP" LT (P1)
CONTROL
M50 LRRA NO. 1 UNIT AUDIO AUDIO
RADIO <2450'
(E2-4) REPETITION GENERATOR
MODE 3
ALTITUDE
1
<1000' RATE PUSH TO
CONTROL G/S
TRIP
D235 MODE
<700' CONTROL INHIBIT

INHIBIT
INDICATOR "SINK RATE"
MODE 4
A114
1
B34
<200'
3
AUDIO
A A
CONTROL<50' GENERATOR
4
APD ENGAGE
E
MODE 5
A122
2
LRRA SIGNAL CONTROL MODE
DETECTOR L835 F/O "BELOW G/S" LT (P3)
M160 FLT INSTR "TERRAIN"
2
ACCESS UNIT (E1-2) AUDIO
2D105
B19 GENERATOR
TESTEXTERNAL
RR
3 _A
MODE SYSTEM FAIL
TEST "DON'T SINK"
4
3
STATUS AUDIO
1
N1 LRRA NO. 1 IND (P1) AND GENERATOR L815 F/O "PULL UP" LT (P3)
SELF
GS VALID B26 TEST
ILS (28V DC) B1
"MINIMUM"
GS DEV -
+  LOGIC AUDIO
GEAR DOWN
3
GLIDE SLOPEGENERATOR
B31 DEVIATION
SELECTED VHF NAV RCVR 4
B32 PROCESSOR C
B
MODE PUSH TO TEST A
AD658
"TOO LOW FAIL
4
TERRAIN"  2
GEAR DOWNB12
A35 BARO TEST . BARO VALID AUDIO
1
D
VALID A GENERATOR
G
GEAR UPD1205 L836 GPWS "INOP" TEST
TEST
GEAR DOWN B22 4
B23 "TOO LOW GEAR"
LANDING GEAR LEVEL DETECTOR G/S INHIBIT
3
E 4A AUDIO FLAP/GEAR INHIBIT
SWITCH (P2) GENERATOR
9
AUDIO D1203
D4374
H8
FLAP UP OUTPUT
FLAP UP A33 3
27 "TOO LOW FLAP"
B24 TRANS-
5
DETECTOR B14 4
4B AUDIO NORMAL
C
FORMERS
6
FLAP DOWN
GENERATOR GPW SPEAKER S715 GROUND PROXIMITY WARNING
LANDING FLAP SWITCH (P5)
M652 GROUND PROXIMITY WARNING COMPUTER (E2-4) SYSTEM MODULE (P3)
(MAIN WHEEL WELL AREA)
Ground Proximity Warning System Schematic
Figure 3 (Sheet 1)

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù.
 AIRPLANES WITH A FLAP/GEAR  ú 34-42-00
 INHIBIT SWITCH  ú ú 03 Page 6 ú Nov 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
GND PROX WARN
INHIBIT115V ACB3
D1153DC DETECTION
D
GND OUT TEST
POWER
ELECNO. 1 AIRMODE 1 WARNING
B4PULL UP
ON MODES
WARN
SUPPLYELASPED BRIGHT
B11
NO. 1DATA CMPTR 1 DETECTOR
B6 1,2,3,4,
ENABLE
TIME IND F
AUTO XFMR INHIBIT DIM
　
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