(f)
Install a grease fitting (7) in the center of each pin.
(g)
Temporarily install the aftflap on the midflap.
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A
747-400 MAINTENANCE MANUAL
S 494-013
CAUTION:_______DO NOT LET THE AFTFLAP ARMS TOUCH THE MIDFLAP. THE MIDFLAP WILL BE DAMAGED.
(2)
Remove the spreader bar, load positioner, and strongback from the aftflap.
S 424-029
(3)
Install the screws at the strongback attach points.
S 864-014
(4)
Supply electrical power (Ref 24-22-00/201).
S 834-015
(5)
Adjust the outboard aftflap:
CAUTION:_______MONITOR THE FLAP MOVEMENT CAREFULLY. THE FLAPS CAN BE
DAMAGED BY INCORRECTLY ADJUSTED COMPONENTS.
DO NOT OPERATE THE FLAP IF THE AFTFLAP IS NOT CONNECTED TO THE MIDFLAP. THE AFTFLAP AND THE MIDFLAP WILL BE DAMAGED.
BEFORE YOU OPERATE THE FLAPS, MAKE SURE THAT THE HOOK ON THE GENEVA CAM MECHANISM IS IN THE RELEASED POSITION (DETAIL C, FIG. 402). THE FLAPS WILL BE DAMAGED YOU OPERATE THEM WITH THE HOOKS IN THE LATCHED POSITION.
(a)
Push the ALTN FLAPS ARM switch to put the flaps in alternate control.
(b)
Use the ALTN FLAPS switch to move the outboard flaps
electrically.
NOTE: Move the flaps until the universal joint and the ball
____
screw nut is as shown in Fig. 403.
(c)
Turn the ALTN FLAPS switch to the OFF position.
(d)
Move the aftflap to the 6.70 to 6.80 inch (17.0 to 17.3 cm) dimension (Fig. 404).
(e)
Adjust the bulb seal on the midflap trailing edge until it is compressed as shown on Fig. 404.
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747-400
MAINTENANCE MANUAL
TRANSMISSION
FOREFLAP
MIDFLAP
SEE A
45.00 |0.25 INCH
(114.30 |0.64 cm)
STOP
UNIVERSAL BALLSCREW
JOINT NUT
A
Ballscrew Position for Aftflap Installation
Figure 403
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A
747-400 MAINTENANCE MANUAL
FOREFLAP
MIDFLAP
A
A
AFTFLAP
FWD
CONCAVE WASHER BOLT
MIDFLAP COMPRESS 10-60%
CONVEX 0.22-0.27 INCH
WASHER SEAL
(5.6-6.9 mm) RETAINER
1
BOLT
CONVEX NUT WASHER CONVEX 0.00 |0.06 INCH
SUPPORT
CONCAVE
(0.00 |1.5 mm)
STRUT
AFTFLAP
WASHER
SEAL
SHIM
0.40-0.55 INCH THE AFT EDGE
(10.2-14.0 mm)TAPERED
OF LEADING FILLER
6.70-6.80 INCH
EDGE SKIN (17.0-17.3 cm)
THE FORWARD EDGE OF THE FIBERGLASS MIDFLAP COVE PANEL
A-A
1 WITH THE MOVABLE FAIRINGS INSTALLED AND ADJUSTED AND THE FLAPS FULLY RETRACTED
Bulb Seal Adjustment Figure 404
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747-400
MAINTENANCE MANUAL
CAUTION:_______ ADJUST THE AFTFLAP ACTUATOR RODS (AFT RODS) ONLY. THE
NECESSARY DIMENSION MUST BE IN THE LIMITS AT THE TWO ENDS
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