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A
747-400 FAULT ISOLATION/MAINT MANUAL
COMPONENT  FIG. 102 SHT  QTY ACCESS/AREA  REFERENCE 
DETECTOR - (REF 26-14-20, FIG. 101) SMOKE - DOOR 5 CREW REST R SIDE, M7420 SMOKE - DOOR 5 CREW REST L SIDE, M7421 
RELAY - (REF 31-01-36, FIG. 101) R RADIO ALTIMETER, B74 LIGHT - MASTER WARNING AND CAUTION, CAPT, DECOMPRESSION, R36 L RADIO ALTIMETER, B73 FIG. 101) RECEIVER/TRANSMITTER - (REF 34-33-00, S1925, F/O, S1926 L IRS RIGHT SELECT, R1156 PSEU, M7838 UNIT - (REF 23-27-00, FIG. 101) SPEED BRAKE DOWN, S217 SWITCH -F/O ADC SOURCE SELECT, R7385 UNIT - (REF 32-09-00, FIG. 101) SWITCH - (REF 27-62-00, FIG. 101) CAPT ADC SOURCE SELECT, R7384 SWITCH - (REF 34-12-00, FIG. 101) CONFIGURATION GEAR OVERRIDE, S3, M7990 SPEED BRAKE LEVER, S1927 SWITCH - (REF 27-60-00, FIG. 101) NOSE OLEO PRESSURE, S113 SWITCH - (REF 32-21-00, FIG. 101) FIRE TEST, R7690 SWITCH - (REF 26-15-00, FIG. 101) PARKING BRAKE, R732 R EIU, M7351 L EIU, M7353 C EIU, M7352 UNIT - (REF 31-61-00, FIG. 101) R FLAP CONT, M7870 L FLAPCONT, M7884 UNIT - (REF 27-41-00, FIG. 101) ACARS MANAGMENT, B7062 RELAY - (REF 31-01-39, FIG. 101) R IRS LEFT SELECT, R1157 -- 2  RIGHT SIDE FLT COMPT, LIGHTSHIELD LEFT AND  *
UNIT - MAWEA POWER SUPPLY, YMXA19,YMXA20 -- 2  117AL, MAIN EQUIP CTR  31-51-01 

* SEE WDM EQUIPMENT LIST
MAWEA - Component Index
Figure 101 (Sheet 2)

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

747-400
FAULT ISOLATION/MAINT MANUAL

CAPT, F/O MASTER WARNINGP7 PANEL AND CAUTION LIGHT, S1925,S1926
SEE B
MAWEA POWER SUPPLY UNIT B, YMXA20
SEE C
MAWEA CARD
FILE, M7952

SEE A
MAWEA POWER SUPPLY UNIT A, YMXA19
SEE C
MAWEA CARD FILE, M7952
A
CAPT, F/O MASTER WARNING AND CAUTION LIGHT S1925, S1926
B
MAWEA POWER SUPPLY UNIT, A, B, YMXA19, YMXA20
C

MAWEA - Component Location
Figure 102

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 MAWEA - ADJUSTMENT/TEST
_______________________
 1.  General_______
 A.  This procedure gives two tasks for the Modularized Avionics Warning Electronics Assembly (MAWEA). The first task is a BITE Test which you do when you apply power. The second task is an Input Systems Test which will do a check of the MAWEA's interfaces with other systems.
 TASK 31-51-00-715-014
 2.  MAWEA - Operational Test________________________
 A.  General
 (1)  You do the BITE test only when the MAWEA is energized and on the ground. All failures that occur are written to the CMC. The stick shaker will come on during the BITE test. The red light will come on if a printed-circuit card or power supply is bad. Also, the BITE transmits a sound through the aural warning speakers to do a test of their operation.
 B.  References
 (1)  AMM 24-22-00/201, Manual Control
 C.  Access
 (1)  Location Zone 116 Area Between Nose Gear Well and Fuselage - RH
 D.  Procedure
 S 865-015
 (1)  
Supply electrical power (AMM 24-22-00/201).

 S 865-017

 (2)  
Make sure these circuit breakers are closed:

 (a)  P7, Overhead Circuit Breaker Panel
 1) 7A01, MAWEA PWR A
 2) 7A03, AURAL WARN L
 3) 7A04, AURAL WARN R
 4) 7B01, MAWEA PWR B
 5) 7D05, STICK SHAKER L

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