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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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747-400
MAINTENANCE MANUAL
(4)
Make sure the flap control lever is in the UP detent and the LE flaps are fully retracted.
S 715-006
(5)
Monitor the extension of group A LE flaps:
(a)
Move the flap control lever to the 1-unit detent.
(b)
Make sure the FLAPS display shows on the main EICAS. 1) Make sure the flap indicator bar shows in magenta color when the group A LE flaps start to move.
2) Make sure the flap indicator bar changes to green color when the group A LE flaps are extended.
(c)
Monitor the LE flap PDUs on the EICAS flight controls maintenance page: 1) Make sure that the 6 inboard indications show INT when the
group A LE flaps move. 2) Make sure the 2 outboard indications show RET. 3) Make sure the 6 inboard indications show EXT when the group
A LE flaps are extended.
S 715-007
(6)
Monitor the extension of group B LE flaps:
(a)
Move the flap control lever to the 5-unit detent.
NOTE: The EICAS caution message FLAPS PRIMARY and the status
____ message TE FLAPS will show after you move the flap control lever.
(b) Monitor the LE flaps on the main EICAS: 1) Make sure the 2 outboard LE flap boxes show a white
crosshatched when the group B LE flaps move. 2) Make sure the 4 inboard LE flap green boxes stay the same. 3) Make sure the 2 outboard LE flap boxes change to green
boxes when the group B LE flaps are extended.
(c) Monitor the LE flap PDUs on the EICAS flight controls maintenance page: 1) Make sure the 2 outboard indications show INT when the
group B LE flaps move.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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747-400 MAINTENANCE MANUAL
2) Make sure the 2 outboard indications show EXT when the group B LE flaps are extended.
S 715-008
(7)
Monitor the LE flap retraction:
(a)
Move the flap control lever to the UP detent.
(b)
Make sure the 6 LE flap boxes show a white crosshatched when the LE flaps move.
(c)
Make sure the EICAS flight controls maintenance page shows INT when the LE flaps move.
(d)
Make sure the 2 outboard indications on the EICAS flight controls maintenance page show RET when the group B LE flaps are retracted.
(e)
Make sure the 8 LE flap indications on the EICAS flight controls maintenance page show RET when the LE flaps retract.
(10)
If the electrical power is not necessary, do this task: "Remove Electrical Power" (Ref 24-22-00/201).
S 865-011
(8) Do this task: "Remove Pneumatic Power" (Ref 36-00-00/201).
(9) S 865-006Do this task: "Trailing Edge Flap Activation" (Ref 27-51-00/201).
S 865-028
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