4
TARGET AIRSPEED INPUT
(22-31-00)

TARGET AIRSPEEDREFFERENCE INPUT(22-31-00)

TARGET AIRSPEED VALID IN(22-31-00)
MACH WARNING TEST IN
(34-15-00)

5 ALT VALID 3 IN
VMO/MMO CURVE
SELECT INPUT
(FIG 6)

COARSE ALTITUDE INPUT
FINE ALTITUDE INPUT
0-5V AC PANEL LIGHTS ELECTRIC MACH AIRSPEED INDICATOR
Air Data System No. 1 Schematic (No. 2 Typical)Figure 4 (Sheet 2)

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A

737-300/400/500
MAINTENANCE MANUAL

ELECTRIC ALTIMETER

Air Data System No. 1 Schematic (No. 2 Typical)
Figure 4 (Sheet 3)

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A 737-300/400/500MAINTENANCE MANUAL

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A 737-300/400/500MAINTENANCE MANUAL
DATA WORD ARINC 429 DIGITAL  SOURCE BUS  DADC-1 
L1  L2  L3  L4 
DESTINATION  FCC A  ARINC 429 A/S RCVR  EFIS SYM GEN NO. 1  TAT/ SAT/ TAS IND  EIS  A/T  GPWC  STALL WARN NO. 1  FMC  IRU 1 
203 ALTITUDE  X  X  X  X  X  X 
204 BARO-CORRECTED ALT-1  X  X  X  X 
205 MACH  X  X  X  X  X 
206 COMPUTED AIRSPEED  X  X  X  X  X  X  X 
210 TRUE AIRSPEED  X  X  X  X  X  X 
211 TOTAL AIR TEMPERATURE  X  X  X  X 
212 ALTITUDE RATE  X  X  X  X 
213 STATIC AIR TEMPERATURE  X  X  X 
217 STATIC AIR PRESSURE  X  X 
220 BARO-CORRECTED ALT-2  1  2  X 
242 TOTAL AIR PRESSURE  X 

DATA WORD ARINC 429 DIGITAL  SOURCE BUS  DADC-2 
R1  R2  R3  R4 
DESTINATION  FCC B  EFIS SYM GEN NO. 2  A/T  STALL WARN NO. 2  FMC  IRU 2 
203 ALTITUDE 204 BARO-CORRECTED ALT-1 205 MACH 206 COMPUTED AIRSPEED  X X X X  X X  X X X X  X X X  X X X X  X 
210 TRUE AIRSPEED 211 TOTAL AIR TEMPERATURE 212 ALTITUDE RATE 213 STATIC AIR TEMPERATURE  X X  X  X X X  X X  X X X 
217 STATIC AIR PRESSURE 242 TOTAL AIR PRESSURE 220 BARO-CORRECTED ALT-2  X X  X  X 

ADC ARINC 429 DIGITAL DATA WORDS

Air Data System Digital Interface Schematic
Figure 5 (Sheet 2)

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E41331
A 737-300/400/500MAINTENANCE MANUAL

F12133

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A 737-300/400/500MAINTENANCE MANUAL

F12256
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