2. Remove Spoiler Mixer
A. Place speed brake control lever in DOWN position.
B. Remove systems A and B hydraulic power (Ref 27-61-0, MP).
C. Install rigging pin A/S-3 in the spoiler quadrant lower lever (Fig. 401).
D. Install rigging pin A/S-4 in aileron bus drum.
E. Install rigging pin A/S-14 in spoiler mixer.
CAUTION: TO PREVENT POSSIBLE DAMAGE TO SPOILER MIXER, RIGGING PIN A/S-14 SHOULD REMAIN INSTALLED IN MIXER DURING STORAGE.
F. Disconnect pushrod from ground spoiler control valve.
G. Disconnect aileron spring cartridge from lower lever. Move aileron spring cartridge for additional access when loosening coupling bolts.
H. Loosen all bolts on the four couplings.
I. Remove four mixer mounting nuts.
J. Remove mixer from airplane.
500
Feb 20/88 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 27-61-21 Page 401
G29727G33820
Spoiler Mixer Installation 500
27-61-21 Figure 401 (Sheet 1) Aug 15/69
Page 402
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
500 Spoiler Mixer Installation
May 15/72 Figure 401 (Sheet 2) 27-61-21
Page 403
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
K. Remove two bolt couplings from speed brake input shaft and two mixer output shafts. The remaining one bolt coupling shall remain with mixer.
L. Remove pushrod from spoiler mixer as follows:
(1)
Detach pushrod output lever from spoiler mixer.
(2)
Remove bolt-attaching pushrod to pushrod output lever.
(3)
Reattach pushrod output lever to spoiler mixer.
(4)
Temporarily attach pushrod to ground spoiler control valve.
3. Install Spoiler Mixer
CAUTION: MAKE SURE YOU HAVE THE CORRECT PART NUMBER OF THE SPOILER MIXER. OTHER SPOILER MIXERS WILL INSTALL BUT WILL NOT OPERATE CORRECTLY. DAMAGE TO EQUIPMENT AND STRUCTURE MAY OCCUR.
A. Attach pushrod to spoiler mixer (Fig. 401).
(1)
Detach pushrod output lever from spoiler mixer.
(2)
Position pushrod so that fixed rod end will be connected to mixer.
(3)
Install rod end bolt with bolthead toward mixer.
(4)
Secure bolt with washer and locknut. Tighten locknut within 50 to 70 pound-inch torque range.
(5)
Reattach assembly of pushrod output lever and pushrod to spoiler mixer.
B. Check that speed brake control lever is in DOWN position. Check speed brake input quadrant position by inserting and removing rigging pin SB-2.
C. Position two bolt couplings on the ratio changer.
(1)
Couplings shall be positioned as shown in Fig. 401.
(2)
Secure bolts with washer and locknut but do not tighten locknuts.
D. Deleted.
E. Position one bolt coupling on the mixer.
(1)
End of coupling with clamp-up bolt goes on aileron input shaft of mixer.
(2)
Install bolt on outboard side of shaft with bolthead up.
(3)
Secure bolt with washer and locknut but do not tighten locknut.
500
27-61-21 Page 404 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. May 01/00
F. Align mixer with ratio changer and engage couplings and mounting studs. Check that pushrod is aligned with ground spoiler control valve.
G. Secure mixer on four mounting studs.
(1)
Install washer and locknut.
(2)
Tighten locknut within 50 to 70 pound-inches torque range.
H. Tighten the seven nuts on the four couplings to 50 to 70 pound-inches torque.
I. Connect pushrod to ground spoiler control valve.
(1)
Using ground spoiler control valve rigging tool, position control valve lever so that dimension A is 0.70 ± 0.01 inch.
(2)
Loosen checknut and adjust rod end until rod end bolt fits freely. Lubricate rod end threads with grease.
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