TOTAL AIR TEMPERATURE PROBE

(WITH FLAGS) (WITHOUT FLAGS) MACH/AIRSPEED INDICATOR

Air Data System Component Location
Figure 1 (Sheet 1)

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A 737-300/400/500MAINTENANCE MANUAL

(WITH FLAG) (WITHOUT FLAG) ELECTRIC ALTIMETER

TAT/SAT/TAS INDICATOR

STANDBY AIRSPEED/ALTIMETER INDICATOR

Air Data System Component Location
Figure 1 (Sheet 2)

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A

737-300/400/500MAINTENANCE MANUAL
PITOT STATIC PRESSURE INPUTS

TEST SELECT SWITCH
TEST
VALID LIGHT

TEST SWITCH
DIGITAL AIR DATA COMPUTER

Air Data System Component Location
Figure 1 (Sheet 3)

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A 737-300/400/500MAINTENANCE MANUAL

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E04412
A 737-300/400/500MAINTENANCE MANUAL
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TEMP
TAT PROBE DADC 2

CABIN PRESSURE CONTROLLER IS CONNECTEDTO EITHER ADC #1 OR ADC #2
AIRPLANES HAVE EITHER STALL WARNING ORSTALL MANAGEMENT COMPUTERS
Air Data System No. 2 Block DiagramFigure 3
L12989

A 737-300/400/500MAINTENANCE MANUAL
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ALT
COARSE 1
(SH 2)(SH 3)
ALT
FINE 1

(SH 2)(SH 3)
ALT
COARSE 2 (FIG. 6)

ALT
FINE 2 (FIG. 6)
ALT
COARSE 3

NC
ALT
FINE 3
A/S 1
(SH 2)

A/S 2 (FIG. 6)
A/S 3
(FIG 6)

MACH 1
MACH 2
TAS

NC
ALT RATE 1
ALT RATE 2
ALT RATE 3
ALT RATE 4ALT POT OUT (FIG. 6)TAS POT OUTSAT POT OUTMACH POT 1 NCMACH POT 2CAS POT

1/Q
GAIN (22-12-00)

BUS 1
(FIG 5)
BUS 2 (SH 3)
(FIG 5)

BUS 3
(FIG 5)
BUS 4
(FIG 5)

ALT VALID 1
NCALT VALID 2
ALT VALID 3ALT VALID 4MACH VALID 1 NC
MACH VALID 2TAS/SAT VALIDA/S VALID 1A/S VALID 2 NC
Air Data System No. 1 Schematic (No. 2 Typical)
Figure 4 (Sheet 1)

A 737-300/400/500MAINTENANCE MANUAL

26V AC POWER INPUT

COMPUTED

3
AIRSPEEDINPUT
AUTOTHROTTLE
EXCITATION 26V AC
(22-31-00)

AUTO THROTTLEOUTPUT(22-31-00)
　
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