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2.  Equipment and Materials
A.  Overhead crane or a portable crane equipped with a 50-foot boom and capable of lifting 2400 pounds
B.  Sling Assembly - F80035-( ) (Used if fin will not be placed on its side)
C.  Sling Assembly - C55004-1 (Used if fin will be placed on its side)
D.  Grease - BMS 3-24 (Ref 20-30-21)
E.  Cleaning Solvent - Kerosene, VV-K-221 (Ref 20-30-31)
F.  Corrosion Inhibiting Compound - BMS 3-23 (Ref 20-30-21)
G.  Rigging Pin (centering unit output crank) R-5 - 0.311\+0.000/-0.002-inch diameter x 4 inches long (MS20392-4)
NOTE: Rigging pin is part of kit F70207-3, -52, -61, or -84.
H.  Alignment and Guide Pins - MIT 65-73716-1 (2) and MIT 65-73716-2 (4)
I.  Rudder Gust Lock - SE27-2006 (Airplanes with 3 rudder balance weights, install across lower balance weight slot), or F80150-1
3.  Prepare for Removal
A.  Open navigation system circuit breakers on P6 and/or P8. Open rudder control circuit breakers on P6.
B.  Depressurize rudder hydraulic system (Ref 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.
C.  Remove vertical fin access panels 9503, 9504, 9505, 9506, and open stabilizer jackscrew compartment door 3701.
D.  Install rudder gust lock with warning streamer.
4.  Remove Vertical Fin
A.  Disconnect and cap hydraulic lines at base of fin.
B.  Disconnect the pitot static lines that go to the elevator pitot tubes.
(1)  Put caps on the ends of the tubes.
C.  Disconnect the electrical connectors from the flux valves
D.  Disconnect the electrical connectors from the elevator probe heaters.
E.  Disconnect following electrical cables:
(1)  
Disconnect VOR cables in stabilizer jackscrew compartment above and aft of pressure bulkhead.

(2)  
Disconnect rudder control cables at rudder control power unit.

F.  Disconnect rudder flight control cables as follows:
(1)  
Set rudder trim control wheel in control cabin to NEUTRAL.

(2)  
Install rudder centering unit output crank rigging pin.

(3)  
Disconnect rudder control and rudder trim control cables at turnbuckles in stabilizer jackscrew compartment. Clamp cables.

Feb 20/93 55-30-0 Page 401 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.

G.  If F80035-( ) sling assembly will be used, do the following:
NOTE:  Vertical fin may be removed with or without rudder installed. For use of sling in either case, see Fig. 402.
(1)  
Install two sling attachment fitting F80035-9 on the left side and two fittings F80035-10 the right side of the vertical fin. Store the sling attachment positioning screws.

(2)  
Attach the sling assembly to crane.

(3)  
Position the sling assembly and connect to the fin attachment fittings.

(4)  
Tension the sling assembly so that the load on fin attachment bolts is relieved.

H.  If you will use the C55004-1 sling assembly, do these steps:
NOTE:  See Fig. 402 (Sheet 2) to use the sling.
(1)  
If you will put the vertical fin on its right 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 (8) to the left side at the front spar at location E.

(c)  
Install the applicable adapter (6) to the left side at the rear spar at location F.

(d)  
Install the applicable adapter (3) to the left 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 left side to the applicable adapter (8) at the front spar at location E.

(g)  
Install the strongback (10) on the left side to the applicable adapter (6) at the rear spar at location F.

(h)  
Install the strongback (5) on the left side to the applicable adapter (6) at the rear spar at location F.

(i)  
Install the strongback (5) on the left side to the applicable adapter (3) 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 right side at location A.

　
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