(7)  
Set aileron control wheel at zero.

(8)  
Set speed brake control lever so that spoiler No. 2 is 15 (+1) degrees up from zero. Check that spoilers No. 3, 6 and 7 are within +0.5 degree of spoiler No. 2 and each other.

(9)  
Place speed brake control lever in UP position.

(10)
Check that spoiler No. 2 is 39 +3 degrees up from zero.

(11)
Check that spoiler No. 7 is within +2 degrees of spoiler No. 2 with a minimum of 36 degrees up from zero.

500 
Oct 20/89  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  27-61-21 Page 501 

D.  Test Spoiler Mixer for correct part (IPC Chapter 27)
NOTE:  If the spoiler mixer does not pass this test, make sure the correct spoiler mixer part number is installed.
(1)  
Move speed brake lever to flight detent.

(2)  
Turn the control wheel to the fully counterclockwise position and hold.

(3)  
Make sure that the right flight spoilers 6 and 7 are 7.5 degrees or less from the fully down position.

(4)  
Turn the control wheel to the fully clockwise position and hold.

(5)  
Make sure that the left flight spoilers 2 and 3 are 7.5 degrees or less from the full down position.

E.  Return Airplane to Normal
(1)  
Place speed brake control lever in DOWN position to lower spoiler.

(2)  
Remove systems A and B hydraulic power (AMM 27-61-0/201).

(3)  
Remove electrical power if no longer required.

(4)  
Remove protractors, mount, and stands from captain's control wheel and from spoilers No. 2 and 7.

500 
27-61-21 Page 502  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  May 01/00 

SPOILER RATIO CHANGER - REMOVAL/INSTALLATION
1.  Equipment and Materials
A.  Grease - MIL-G-23827 (Ref 20-30-21)
B.  Cable Tensiometer - 0 to 150-pound range, for 1/8 inch cable
C.  Rigging Pins Kit - F70207-3, -52, -61, or -84:
Ref No.  F70207-( )  Diameter (inches)  Length (inches)  Function 
A/S-3  -8  0.309-0.311  3.7 ±0.25  Spoiler control quadrant   lower lever 
A/S-8  -23  0.246-0.248  3.7 ±0.25  Spoiler actuator quadrant   (left wing) 
A/S-9  -23  0.246-0.248  3.7 ±0.25  Spoiler actuator quadrant   (left wing) 
A/S-10  -23  0.246-0.248  3.7 ±0.25  Spoiler actuator quadrant   (right wing) 
A/S-11  -23  0.246-0.248  3.7 ±0.25  Spoiler actuator quadrant   (right wing) 
A/S-14  -11  0.309-0.311  6.7 ±0.25  Spoiler mixer 
S/B-1  -11  0.309-0.311  6.7 ±0.25  Speed brake forward 
S/B-2  -13  0.309-0.311  2.35 ±0.06  drum Speed brake input   quadrant 

2.  Prepare Spoiler Ratio Changer for Removal
A.  Place speed brake control lever in DOWN position.
B.  Remove systems A and B hydraulic power (Ref 27-61-0 MP).
C.  Open lower fuselage nose compartment access door.
D.  Remove left forward, nose wheel access panel.
E.  Remove spoiler mixer (Ref 27-61-21 R/I).
3.  Remove Spoiler Ratio Changer (Fig. 401)
A.  If a new spoiler ratio changer is to be installed, remove two-bolt couplings from speed brake input shaft and two spoiler mixer output shafts.
Feb 20/88 27-61-31 Page 401
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.

G33837G33816
Spoiler Ratio Changer and Mixer  500 
27-61-31  Figure 401 (Sheet 1)  Aug 15/69 
Page 402 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

500  Spoiler Ratio Changer and Mixer 
May 15/72  Figure 401 (Sheet 2)  27-61-31 
Page 403 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

B.  Disconnect spoiler cables from spoiler output quadrants (Fig. 402).
(1)  
Attach cable retainers to maintain a slight cable tension.

(2)  
Break lockwire, remove turnbuckle-locking clips and disconnect turnbuckles located in right and left wheel wells.

(3)  
Identify cables for future installation.

(4)  
Remove cables from quadrants.

C.  Disconnect speed brake control cables from speed brake input quadrant (Fig. 403).
　
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