(m)  
Connect the bridle hook C to the strongback (2) on the left side at location C.

(n)  
Connect the bridle hook H to the strongback (5) on the left side at location H.

(o)  
Connect the bridle hook G to the strongback (10) on the left side at location G.

(2)  
If you put the vertical fin on its left side, do these steps:

(a)  
Install each of the applicable adapters (1) to the left and right side along the front spar at locations A, B, C and D.

(b)  
Install the applicable adapter (9) to the right side at the front spar at location E.

(c)  
Install the applicable adapter (7) to the right side at the rear spar at location F.

(d)  
Install the applicable adapter (4) to the right side at the rear spar at location H.

(e)  
Install each of the strongbacks (2) to the applicable adapter (1) on the left and right side at the front spar at locations A, B, C and D.

(f)  
Install the strongback (10) on the right side to the applicable adapter (9) at the front spar at location E.

(g)  
Install the strongback (10) on the right side to the applicable adapter (7) at the rear spar at location F.

(h)  
Install the strongback (5) on the right side to the applicable adapter (7) at the rear spar at location F.

(i)  
Install the strongback (5) on the right side to the applicable adapter (4) at the rear spar at location H.

(j)  
Connect the crane link to the crane hook.

(k)  
Connect the fixed link to the cable from the crane structure.

(l)  
Connect the bridle hook A to the strongback (2) on the left side at location A.

(m)  
Connect the bridle hook C to the strongback (2) on the right side at location C.

(n)  
Connect the bridle hook H to the strongback (5) on the right side at location H.

(o)  
Connect the bridle hook G to the strongback (10) on the right side at location G.

543 
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I.  Cut lockwire and remove antirotation retainer bolt, antirattle washer, antirotation lock, nuts, washers, and bolts attaching vertical fin to fuselage at rear spar.
543 
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J.  Remove cotter pins, self-locking nuts, washers, and bolts (two places) attaching vertical fin to fuselage at front spar.
NOTE:  If fin is being removed for inspection purposes only, remove only one bolt at a time to retain alignment until fin installation.
K.  Hoist vertical fin clear of airplane. Ensure side loads are not imposed on sling attach points.
L.  If the F80035-( ) sling assembly is in use, lower the vertical fin onto a well padded cradle of sandbags placed under the spars. Support the fin in vertical position.
M.  If the C55004-1 sling assembly is in use, lower the crane hook. The fin will rotate to horizontal.
N.  Remove sling and sling attachment fittings.
O.  Install sling attachment positioning screws in fin surfaces.
P.  Install access panels.
Q.  Cover exposed structure on fuselage.
R.  Inspect leading edge for aerodynamic smoothness (Ref SRM 51-70).
5.  Prepare Vertical Fin for Installation
A.  Check that navigation system circuit breakers on P6 and/or P18 are open. Check that rudder control circuit breakers on P6 are open.
B.  Check that rudder hydraulic system is depressurized. If not, depressurize system per Chapter 27, Rudder and Rudder Trim Control System - MP.
WARNING:  RUDDER HYDRAULIC SYSTEM MUST BE DEPRESSURIZED BEFORE WORKING IN AREA OF RUDDER. HYDRAULIC OPERATION OF RUDDER MAY CAUSE PERSONNEL INJURY.
500 
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500  Sling Assembly 
Feb 20/92  Figure 402 (Sheet 1)  55-30-0 
Page 405 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

A08517 E82827
 Sling Assembly Installation  500 
55-30-0  Figure 402 (Sheet 2)  Feb 20/92 
Page 406 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

543  Vertical Fin to Fuselage Attachment 
Feb 01/95  Figure 403  55-30-0 
Page 407 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 
　
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