G10920G11027
Elevator Output Torque Tube Installation  500 
27-31-191  Figure 401  Oct 20/84 
Page 402 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

500  Stabilizer Trim Jackscrew Setting 
Feb 15/68  Figure 402  27-31-191 
Page 403 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

D.  Check that rigging pin E-5 is installed in aft control quadrant.
E.  Fabricate alignment pins to dimensions given in par. 1.E. Install pins to retain bearing
components in torque tube inboard pivot clevis fittings.

5.  Install Output Torque Tube
A.  Position and support output torque tube at aft bulkhead.
B.  Refer to Fig. 401 and install pivot bolts in outboard pivot brackets as follows:
NOTE:  Before installing the inboard pivot bolts, replace the cardboard sleeve in the bearing with a metal pin or sleeve. The pin or sleeve will act as a guide to align bearing parts and will be pushed out when installing the bolt.
(1)  
Apply grease to entire shank of each bolt and install bolts with heads inboard.

(2)  
Install nut and washer at each bolt and tighten using standard torque.

C.  Install pivot bolts in inboard pivot brackets as follows:
(1)
Apply grease to entire shank of each bolt and install bolts with heads inboard.

CAUTION:  LIGHTLY TAP INBOARD PIVOT BOLTS INTO PLACE AND FORCE THE ALIGNMENT PINS OUT. TAKE CARE TO AVOID DAMAGE TO BEARING COMPONENTS. RETAIN ALIGNMENT PINS.

(2)  
Install washer and first locknut and tighten 500 to 600 pound-inches.

(3)  
Install washer and second locknut and tighten 150 to 220 pound-inches.

CAUTION:  AFTER SETTING TORQUE ON SECOND LOCKNUTS, DO NOT ATTEMPT TO RESET TORQUE ON FIRST LOCKNUTS.
D.  Install autopilot mounting bracket and actuators (Ref 22-11-261, R/I).
E.  Install tail cone (Ref Chapter 53, Tail Cone - R/I).
F.  Remove right power control unit (Ref 27-31-101, R/I), and install rigging and restraining tool in place of right power control unit using power control unit upper and lower mounting bolts (Fig. 401).
G.  Set stabilizer B dimension at 41.57 + 0.05 inches using trammel bar (Fig. 402).
H.  Loosely install bolt to connect forward end of right elevator control pushrod to output torque tube.
I.  Check right elevator trailing edge aligns with index mark on tail cone within 0.12 inch (Detail A, Fig. 401).
J.  If right elevator does not align, adjust right elevator control pushrod as follows:
(1)  Remove pushrod forward mounting bolt.
CAUTION:  DO NOT PERMIT INNER RACE OF OUTPUT TORQUE TUBE CRANK BEARING TO ROTATE TO A POSITION WHERE ROLLERS MAY DROP OUT THROUGH OLE IN INNER RACE.
27-31-191 May 01/99 Page 404
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.

(2)  Back off checknut and adjust rod end fitting until elevator trailing edge aligns with index mark within 0.12 inch, with pushrod forward mounting bolt installed.
NOTE:  One-half turn of rod end fitting equals 0.20-inch movement at elevator trailing edge.
K.  Loosely install bolt to connect forward end of left elevator control pushrod to output torque tube.
L.  Check left elevator trailing edge aligns with index mark on tail cone within 0.12 inch.
M.  If left elevator does not align, adjust left elevator control pushrod as follows:
(1)  
Remove pushrod forward mounting bolt.

CAUTION:  DO NOT PERMIT INNER RACE OF OUTPUT TORQUE TUBE CRANK BEARING TO ROTATE TO A POSITION WHERE ROLLERS MAY DROP OUT THROUGH HOLE IN INNER RACE.

(2)  
Back off checknut and adjust rod end fitting until elevator trailing edge aligns with index mark within 0.12 inch, with pushrod forward mounting bolt installed.

N.  Check left elevator trailing edge aligns with right elevator trailing edge within 0.12 inch, as measured from each elevator trailing edge to adjacent index mark. If necessary, readjust either left or right elevator control pushrods to obtain this requirement.
O.  Grease checknut threads, then tighten checknuts on left and right elevator control pushrod end fittings 750 to 900 pound-inches, and lockwire.
P.  Attach left and right elevator control pushrods to output torque tube as follows:
(1)  
Ensure bolt is installed with head inboard.

(2)  
Install two washers under first locknut and tighten 500 to 600 pound-inches.

(3)  
Install one washer under second locknut and tighten 150 to 220 pound-inches.

CAUTION:  AFTER SETTING TORQUE ON SECOND LOCKNUTS, DO NOT ATTEMPT TO RESET TORQUE ON FIRST LOCKNUTS.
　
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