(c)
On the right power distribution center, P415:
1) 415A38, FUEL OVRD/JTSN PUMP AFT 2
2) 415B38, FUEL OVRD/JTSN PUMP AFT 3
3) 415M32, OVRD/JTSN PUMP CTR R
S 865-041
(6) Put the FUEL JETTISON control selector switch on the fuel jettison module, on the P5 pilots' overhead panel, to the A position.
NOTE: The FUEL JETTISON control selector switch must be in the
____ A position. The test will not pass with switch in the B position.
S 865-121
(7)
Set the GND TESTS switch on the overhead maintenance panel, P461, to the ENABLE position.
S 865-042
(8)
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 <28 FUEL.
(f)
Push the LSK that is adjacent to <28 FUEL to show the GROUND TESTS menu for the fuel system.
(g)
Push the NEXT PAGE key until you find <JETT TRANSFER VLV.
NOTE: If INHIBITED shows above <JETT TRANSFER VLV, the test
____
will not operate.
(h) IF INHIBITED SHOWS ABOVE <JETT TRANSFER VLV, do these steps: 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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747-400 MAINTENANCE MANUAL
F. Jettison Transfer Valve Ground Test
S 745-116
(1)
Push the LSK that is adjacent to the applicable prompt
(<JETT TRANSFER VLV).
(a)
When the TEST PRECONDITIONS page shows, make sure each instruction on the page is completed. (Push the NEXT PAGE key to see the subsequent pages).
(b)
Push the LSK that is adjacent to START TEST>.
NOTE: IN PROGRESS shows during the test.
____
(c) When IN PROGRESS goes out of view, look for PASS or FAIL> adjacent to the <JETT TRANSFER VLV.
NOTE: If a PASS indication shows, no failure occured
____
during the test.
S 745-100
(2)
IF FAIL> shows:
(a)
Push the LSK that is adjacent to FAIL> to see the GROUND TEST MSG page for the failure.
(b)
Push the NEXT PAGE key until you find the GROUND TEST MSG pages.
(c)
Make a list of all CMCS messages, CMCS message numbers that show on the GROUND TEST MSG pages.
(d)
Go the the CMCS Message Index of the Fault Isolation Manual to find the corrective action for each CMCS message.
G.
Put the Airplane Back to Its Usual Condition
(1)
Set the GND TESTS switch to the NORM position.
(2)
Put the FUEL JETTISON control selector switch to OFF.
S 865-145
(3)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:
(a)
On the main power distribution panel, P6:
1) 6C18, JTSN NOZZLE VLV CONT R
S 865-143
S 865-166
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747-400 MAINTENANCE MANUAL
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