(2)
Disconnect bonding jumpers from elevator tab at inboard and outboard hinge fittings.
(3)
Remove hinge bearing bolts.
(4)
Remove elevator tab from elevator.
(5)
If a different elevator tab is to be installed on the airplane, proceed as follows:
(a)
Remove cotter pin, nut, washers, bushings, and hinge bearing bolt from elevator tab hinge fitting. Withdraw tab hinge fitting.
(b)
Install tab hinge fitting at original location on removed elevator tab. Replace shims in same order as removed. Install dimpled washers under screw heads if installed. Tighten hinge retaining screws 20 to 25 pound-inches.
(c)
Retain hinge bearing nuts, washers, bushings, and bolts for subsequent installation.
E. Prepare For Installation
(1)
Remove elevator systems A and B hydraulic power (Ref 27-31-0, MP).
(2)
Check that rigging pin E-5 is installed in aft control quadrant.
(3)
Check wear at tab pushrod attach points per 27-31-121, I/C.
(4)
Check data plate on elevator tab for required number of tab adjust weights. Check balance bay No. 2 for number of tab adjust weights installed lower surface of elevator nose.
(5)
Install hinge bearing bolts with boltheads outboard at each tab hinge location. Install bushings facing each other except at inboard hinge location where both bushings face inboard. Install washers and nuts. Tighten nuts to 15 pound-inches.
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F. Install Aluminum Tab/Graphite Elevator
(1)
Remove graphite tab (Ref 27-31-31, M/P).
(a) Discard attaching hardware.
(2)
Install aluminum tab (Fig. 202)
(a)
Install No. 1 hinge fitting using BACB30LJ40425 bolt, washer under bolt head, BACB28AK04-012 bushing (install facing inboard), BACB28AK04-067 bushing on outboard side of fitting, washer and nut.
(b)
Install No. 2, 3 and 4 hinge fittings using BACB30LJ4DU25 bolts, washer under bolthead, one BACB28AK04-047 bushing on each side of fitting, washer and nut.
NOTE: All four hinge fitting bolts are installed from outboard to inboard.
(c)
At inboard and outboard tab hinge fittings, secure bonding jumper to elevator tab. Fillet seal head and tail of bonding jumper with sealant.
(d)
Connect tab pushrods to elevator tab. Ensure bushings are installed and bolts face each other.
(e)
Adjust elevator tab (Ref 27-31-0, A/T).
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Oct 20/85 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 27-09-800 Page 207
G. Install Graphite Elevator Tab/Graphite Elevator
(1)
Manually rotate all hinge fittings through full travel in both directions and check that movement is smooth and without binding.
(2)
Install tab on hinge fittings at elevator rear spar.
(3)
Install hinge retaining screws through upper and lower tab surfaces at each tab hinge location. Tighten screws 20 to 25 pound-inches.
(4)
Deflect tab through full travel in both directions and check that movement is smooth and without binding.
(5)
At inboard and outboard tab hinge fittings, secure bonding jumpers to elevator tab and seal with sealant.
(6)
Connect tab pushrods to elevator tab, ensure bushings are installed an bolts face each other. Do not install nut, washer, and cotter pin until tab alignment is assured.
(7)
Remove rigging pin E-5 from aft quadrant.
(8)
Adjust elevator tab (Ref 27-31-0, A/T).
(9)
Restore airplane to normal hydraulic configuration (Ref. 27-31-0).
(10)
Close access door and install all access panels.
H. Install Graphite Tab/Aluminum Elevator
(1)
Remove aluminum tab (Ref 27-31-31).
(2)
Install graphite tab (Fig. 402).
(a)
Install tab using bolts removed from aluminum tab.
(b)
Install (2) BACB28AK04-004 bushings (Fig. 402) at hinge fittings No. 1, 3, and 4 to provide 0.040 inch clearance at hinge fitting No. 2.
NOTE: All four hinge fitting bolts are installed from outboard to inboard.
(c)
Install existing nuts and tighten to within + .005 inch of fitting surface.
(d)
At inboard and outboard tab hinge fittings, secure bonding jumpers to elevator tab. Fillet seal head and tail of bonding jumper with sealant.
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