B. Grease - BMS 3-24 (Ref 20-30-11)
C. Sealant - BMS 5-95 (Ref 20-30-11)
D. Milliohmmeter - 0- to 0.1-ohm range
3. Prepare for Removal
A. Open or remove the following access panels: Tail cone access door 3802, tab pushrod access panel, tab lock mechanism upper and lower access panels, and tab control mechanism lower access panels.
B. Remove elevator systems A and B hydraulic power (Ref 27-31-0 MP).
C. Install rigging pin E-5 in aft control quadrant (Fig. 403).
4. Remove Elevator Tab (Airplanes with Metal-Fiberglass Elevators)
A. Disconnect elevator tab pushrods from elevator tab by removing pushrod aft mounting bolts (Fig. 401).
B. Detach bonding jumpers from elevator tab at inboard and outboard hinge fittings.
C. Remove hinge retaining screws from upper and lower surfaces of elevator tab at each tab hinge fitting location. Note arrangement of shims, if installed, and retain with tab. Retain tab inboard hinge bolt retainer at upper tab surface.
513
May 01/99 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 27-31-31 Page 401
Elevator Tab Installation 502
27-31-31 Page 402 Figure 401 (Sheet 1) BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Apr 01/97
539 Elevator Tab Installation Feb 20/90 Figure 401 (Sheet 2) 27-31-31 Page 402A/402B BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
501 Elevator Tab Installation
Feb 20/90 Figure 401 (Sheet 3) BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 27-31-31 Page 403
D. Remove elevator tab from elevator.
E. If a different elevator tab is to be installed on the airplane, proceed as follows:
(1)
Remove cotter pin, nut and hinge bearing bolt from elevator tab hinge fitting. Withdraw tab hinge fitting.
(2)
Install tab hinge fitting at original location on removed elevator tab. Replace shims in same order as removed. Install tab inboard hinge bolt retainer at upper tab surface. Install dimpled washers under screw heads. Tighten hinge retaining screws 20 to 25 pound-inches.
(3)
Retain hinge bearing bolts and nuts for subsequent installation. 4A. Remove Elevator Tab (Airplanes with Composite Elevators)
A. Disconnect elevator tab pushrods from elevator tab by removing pushrod aft mounting bolts.
B. Detach bonding jumpers from elevator tab at inboard and outboard hinge fittings.
C. Remove hinge bearing bolts from tab hinge half.
D.
Remove elevator tab from elevator. 4B. Replace Hinge Bearing
A. Remove hinge bearing (Airplanes with Metal-Fiberglass Elevator Tab)
(1)
Remove elevator tab (Ref par. 4).
(2)
Remove elevator tab hinge fitting:
(a)
Remove cotter pin, nut and hinge bearing bolt from hinge fitting.
(b)
Withdraw the hinge fitting.
(3)
Remove the hinge bearing from the hinge fitting.
B. Remove hinge bearing (Airplanes with Composite Elevator Tab)
(1)
Remove elevator tab (Ref par. 4A).
(2)
Remove elevator tab hinge fitting:
(a)
Remove the hinge retainer screws from the upper and lower surfaces of elevator tab.
(b)
Remove as much sealant as possible from around the hinge fitting with a wooden or plastic scraper, using care not to damage the spar.
(c)
Place a thermocouple on the hinge fitting, and heat the fitting to 240 ±10oF using a heat gun. Hold at this temperature for 15 minutes minimum.
(d)
Remove the hinge fitting.
CAUTION: DO NOT HIT THE HINGE FITTING TO BREAK IT FREE. YOU CAN CAUSE DAMAGE TO ELEVATOR TAB.
NOTE: If it is necessary, reheat and allow to remain at 250oF until you can remove hinge fitting.
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