(4) 45-10-00/201, Central Maintenance Computing System
C. Access
(1) Location Zones
221/222 Control Cabin
D. Prepare for the Test
S 865-196
(1)
Supply electrical power (Ref 24-22-00/201).
S 865-199
(2)
Make sure the Aural Warning System operates (Ref 31-52-00/501).
S 865-200
(3)
Make sure the Integrated Display System operates (Ref 31-61-00/201).
S 865-201
(4)
Make sure the Central Maintenance Computing System operates
(Ref 45-10-00/201).
S 865-202
(5)
On the overhead maintenance panel, P461, make sure these switches on the EEC MAINT panel are in the NORM position:
(a)
ENG 1 POWER
(b)
ENG 2 POWER
(c)
ENG 3 POWER
(d)
ENG 4 POWER
S 865-E32
(6)
Make sure that the trailing edge (TE) flap lever is set to a position of 20 or less.
S 865-352
(7)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a) P7 Overhead Circuit Breaker Panel
1) 7C10, FLT CONT ELEC 2L AC
2) 7C12, FLT CONT ELEC 1L AC
3) 7C14, FLT CONT ELEC 1R AC
4) 7C16, FLT CONT ELEC 2R AC
5) 7D05, STICK SHAKER L
6) 7D19, STICK SHAKER R
S 865-129
(8) Set the GND TESTS switch on the overhead maintenance panel, P461, to the ENABLE position.
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747-400 MAINTENANCE MANUAL
S 865-147
(9) Set the AIR DATA switch on the captain's SOURCE SELECT module to the L position.
NOTE: Set the captain's AIR DATA switch to the C position when
____
you do a test of the center ADC.
S 865-149
(10)
Set the EIU switch on the captain's SOURCE SELECT module to the AUTO position.
S 865-135
(11)
Set the AIR DATA switch on the first officer's SOURCE SELECT module to the R position.
S 865-131
(12)
Set the EIU switch on the first officer's SOURCE SELECT module to the AUTO position.
S 865-E20
WARNING: MAKE SURE THE FLAP LEVER AND THE TRAILING EDGE (TE) FLAPS ARE
_______ 20 OR LESS. IF THE TE FLAPS ARE EXTENDED TO MORE THAN 20, THEY CAN MOVE AUTOMATICALLY DURING THE TEST AND CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(13)
Make sure that the trailing edge (TE) flap lever is set to a position of 20 or less.
S 865-203
(14)
Prepare the CDU for the test:
(a)
Push the MENU key on the CDU to show the MENU.
(b)
Push the line select key (LSK) that is adjacent to <CMC to show the CMC MENU.
(c)
If <RETURN shows after you push the LSK, push the LSK that is adjacent to <RETURN until you see the CMC MENU.
(d)
Push the LSK that is adjacent to <GROUND TESTS to show the GROUND TESTS menu.
(e)
Push the NEXT PAGE key until you find <34 AIR DATA.
(f)
Push the LSK that is adjacent to <34 AIR DATA
NOTE: If INHIBITED shows above <ADC-L, <ADC-R or <ADC-C, the
____
test will not operate.
(g) If INHIBITED shows above <ADC-L, <ADC-C or <ADC-R: 1) Push the LSK that is adjacent to the test prompt. 2) Do the steps shown on the CDU. 3) Push the LSK that is adjacent to <RETURN to show the ground
test menu again.
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