S 435-018
(8)
If the torque tubes are disconnected, connect the torque tubes to the flap power packages.
NOTE: Make sure that the position of the flap power packages does
____ not change when you install the torque tubes.
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A
747-400
MAINTENANCE MANUAL
SEE ATRANSMISSION FWD
UPSTOP
UNIVERSAL BALL SCREW
JOINT DOWNSTOP
DIM X
SEE B
BALL SCREW NUT
A
DIMENSION X
STOP
B
Flap Transmission Adjustment
Figure 502
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A
747-400 MAINTENANCE MANUAL
(a)
On the outboard flaps, make sure that dimension X (Fig. 502), is 0.45 to 0.74 inch (1.14 to 1.88 cm).
(b)
On the inboard flaps, make sure that dimension X, is 0.54 to
0.90 inch (1.37 to 2.29 cm).
(c)
Turn the torque tubes with the manual drive tool to adjust dimension X if it is necessary.
(d)
Apply a thin layer of grease to the spline surfaces.
(e)
Align the torque tube with the spline coupling.
(f)
Engage the spline coupling sleeve with the splines.
(g)
Install the three screws to attach the spline coupling sleeve.
CAUTION:_______MAKE SURE YOU INSTALL LOCKWIRE ON THE COUPLING SCREWS. IF THE COUPLING SCREWS COME OFF, THE TORQUE TUBE COUPLING WILL DISCONNECT AND CAUSE DAMAGE TO THE AIRPLANE.
(h)
Install the lockwire on the three screws.
(i)
Make sure that the torque tube guards are installed.
S 725-048
(9)
Do this task: "Operational Test of the RVDT Transmitter at the Flap Power Package" (AMM 27-58-01/501).
S 825-047
(10)
Do this task: "Alternate Limit Switch Pack Adjustment"
(AMM 27-51-18/501).
S 725-019
(11)
Do this task: "Flap Power Package Operational Test".
F.
Put the Airplane Back to Its Usual Condition
S 865-020
(1)
Remove electrical power (Ref 24-22-00/201).
S 415-021
(2)
Install the coverplate.
(a)
Apply a thin layer of grease to the gasket.
(b)
Put the coverplate in its position on the flap power package.
(c)
Attach the coverplate to the flap power package with 10 screws.
S 415-022
(3)
Install the button plug.
(a)
Push the plug into the mounting hole.
(b)
Clean the area around the edge of the cover with solvent.
(c)
Apply a bead of sealant around the edge of the plug.
(d)
Apply primer to the surface if it is necessary.
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747-400 MAINTENANCE MANUAL
S 095-023
WARNING: CAREFULLY DO THE SPECIFIED TASK TO REMOVE THE DOOR LOCKS FROM
_______ THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT REMOVE THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
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