(b)
If a red light on the MAWEA monitor panel shows a bad power supply, do these tasks: "MAWEA Power Supply Removal/Installation" (AMM 31-51-01/401)
(c)
If you did not hear a test sound from the speakers, do these tasks: "Aural Warning Speaker Removal/Installation" (AMM 31-52-04/401).
S 745-019
(4)
Cycle the MAWEA circuit breakers to do the BITE test again to make sure the system operates correctly.
S 865-020
(5)
Remove electrical power if it is not necessary (AMM 24-22-00/201).
TASK 31-51-00-735-021
3. MAWEA - System Test___________________
A. General
(1)
The Input Systems Test will do a check of the bus data between the LRUs and the MAWEA.
(2)
The CMC is used to read the ARINC 429 data transmitted from the MAWEA system through the CDU.
B. References
(1)
AMM 24-22-00/201, Manual Control
(2)
AMM 45-10-00/201, Central Maintenance Computer System
C. Access
(1) Location Zone 116 Area between nose gear well and fuselage - RH
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747-400 MAINTENANCE MANUAL
D. Prepare For The Test
S 715-022
(1)
Make sure the CMC system is on (AMM 45-10-00/201).
S 865-024
(2)
Set the INBD CRT and LWR CRT switches on the captain's and F/O's instrument panel, P1-3 and P3-3, to NORM.
S 865-025
(3)
Set the EIU switch on the captain's and F/O's instrument panel, P1-1 and P3-1, to AUTO.
S 865-026
(4)
Set the IRS switch on the captain's instrument panel, P1-1, to L.
S 865-041
(5)
Set the IRS switch on the F/O's instrument panel, P3-1, to R.
S 865-042
(6)
Set the AIR DATA switch on the captain's instrument panel, P1-1, to L.
S 865-027
(7)
Set the AIR DATA switch on the F/O's instrument panel, P3-1, to R.
S 865-028
(8)
Set the L, C, and R IRS switches on the pilot's overhead panel, P5, to ALIGN or NAV.
S 715-029
(9)
Do the MAWEA - Operational Test.
E. MAWEA Power A and B Test
S 715-030
(1) Do the MAWEA Power A and B Test.
(a)
Make sure the POWER SUPPLY A FAIL/POWER SUPPLY B FAIL lights found on the MAWEA monitor panel are not on.
(b)
Make sure that +12.3 - +13.1 volts is available on the POWER SUPPLY A and the POWER SUPPLY B jacks.
NOTE: The power supply jacks are on the MAWEA monitor panel.
____
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F. Input Interface Test
S 865-031
(1) Prepare the CMC for input monitoring (AMM 45-10-00/201).
(a)
Push the line select key (LSK) adjacent to the <CMC prompt until you see the CMC menu.
(b)
Push the NEXT PAGE key until you see page 2.
(c)
Push the LSK adjacent to the <OTHER FUNCTIONS prompt to show the OTHER FUNCTIONS menu.
(d)
Push the LSK adjacent to the <INPUT MONITORING prompt to show page 1 of INPUT MONITORING.
(e)
Put C/035/350/00 in the scratchpad.
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