*[1] Airplanes with chamfered clevis
*[2] Airplanes with rounded clevis
(9) At the drivescrew to be removed, do these steps (which will help with the installation task):
(a)
Measure and write down the "X" dimension.
1) Make a note of the position of the upstop on the screw yoke in relation to the transmission output shaft.
(b)
If the drivescrew removal is at the outboard transmissions, make a note of the position of the lubrication reservoir on the ballnut.
NOTE: The lubrication reservoir can be inboard or outboard. The same position must be kept after installation.
E. Remove the Drivescrew of an Outboard Flap Transmission (Fig. 402).
(1) Disconnect the gimbal from the fitting on the midflap (Fig. 402, Sheet 2).
(a)
On each side of the fitting on the midflap, remove the failsafe bolts.
(b)
On each side of the gimbal, remove the three fasteners, and the flanged bushings with the adjacent shims.
(c)
Make a record of the shim thickness.
NOTE: Always keep shims with the flanged bushing that they were initially installed with. This is necessary to keep initial lateral position adjustment of the drivescrew.
27-51-73 May 01/00 Page 404
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
K07706
500 Drivescrew of the Outboard Flap Transmission
May 01/99 Figure 402 (Sheet 1) 27-51-73
Page 405
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
(2)
Disassemble the universal joint (Fig. 402, Sheet 1).
(a)
Remove the universal joint bolt, nut, and spacer.
(b)
Move the screw yoke apart from the transmission output shaft and remove the trunnion cross.
(3)
Remove the drivescrew, with the screw yoke and the gimbal, from the airplane.
(4)
Remove the gimbal from the ballnut.
(a)
On the bottom side of the gimbal, remove the two bolts, the flanged bushing and shims.
(b)
Make a record of the shim thickness.
(c)
On the top side of the gimbal, remove the two bolts, the flanged bushing, the cover, and shims.
(d)
Make a record of the shim thickness.
(e)
Remove the gimbal from the ballnut.
(5)
Remove the end fitting from the end of the drivescrew.
(6)
Remove the bolts that attach the screw to the screw yoke.
(7)
Remove the screw yoke from the screw.
H97022
Drivescrew of the Outboard Flap Transmission 500
27-51-73 Figure 402 (Sheet 2) May 01/99
Page 406
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
F. Remove the Drivescrew of an Inboard Flap Transmission (Fig. 403)
(1)
Disconnect the ballnut from the gimbal at the midflap.
(a)
On the lower side of the gimbal, remove the two bolts and the bushing.
(b)
On the top side of the gimbal, remove the two bolts and the bushing.
(c)
Hold the ballnut and screw to make sure they are not damaged or do not cause damage to parts during the removal.
(2)
Disassemble the universal joint (Fig. 402).
(a)
Remove the universal joint bolt, nut, and spacer.
(b)
Move the screw yoke apart from the transmission output shaft and remove the trunnion cross.
(3)
Remove the drivescrew with the screw yoke from the airplane.
(4)
Remove the end fitting from the end of the screw.
(5)
Remove the bolts that attach the screw to the screw yoke.
(6)
Remove the screw yoke from the screw.
3. Flap Ballscrew Installation
A. Equipment
(1)
C27001-10 or -16, Ground Lock Set (for spoilers 1 and 8)
(2)
F800040-( ), Ground Lock Assy (for spoilers 4 and 5)
NOTE: F80040-15 is used on airplanes having ground roll spoilers with single actuators. F80040-2 is used on airplanes having ground roll spoilers with double actuators.
(3)
F80017-33 (Preferred), F80017-23 (Optional), Ground Lock Assy (for spoilers 2, 3, 6, and 7 with chamfered spoiler clevis)
(4)
C27047-16, Ground Lock Set (for spoilers 2, 3, 6, and 7 with rounded spoiler clevis)
B. Consumable Materials
(1)
A00247 Sealant BMS 5-95
(2)
D00013 Grease MIL-G-23827
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