(c)
Remove the aft mounting bolts to disconnect the elevator tab pushrods from the elevator tab.
(d)
Disconnect the bonding jumpers from the elevator tab at the inboard and outboard hinge fittings.
(e)
Remove the hinge bearing bolts from the tab hinge half.
(f)
Remove the elevator tab from the elevator.
S 034-004
(5)
If the hinge bearings need to be replaced, replace the hinge fitting (CMM 55-20-16).
(a)
Remove the tab hinge fitting:
1) Remove the hinge retainer screws from the top and bottom surfaces of the elevator tab.
CAUTION:_______BE CAREFUL WHEN YOU REMOVE THE SEALANT. THE ELEVATOR SURFACE CAN BE DAMAGED.
2) Remove the sealant adjacent to the hinge fitting with a
wooden or plastic scraper. 3) Set a thermocouple on the hinge fitting. 4) Use a heat gun to increase the temperature at the hinge
fitting to 240 - 10 -F.
a) Hold this temperature for 15 minutes minimum.
CAUTION:_______DO NOT HIT THE HINGE FITTING TO BREAK IT FREE. YOU CAN CAUSE DAMAGE TO THE ELEVATOR TAB.
5) Remove the hinge fitting.
NOTE: If it is necessary, you can increase the temperature
____ to 250 -F until you can remove the hinge fitting.
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A
737-300/400/500MAINTENANCE MANUAL
TASK 27-31-31-404-006
3. Elevator Tab Installation (Fig. 401)_________________________
A. Special Tools and Equipment
(1) Rig Pin (E-5) - 0.309/0.311-inch diameter, 6.7 |0.25 inches long (MS20392-4)
NOTE: The rig pin is part of the rig pin kit F70207-69, -78 or -83.
____
B. Standard Tools and Equipment
(1)
Hand Drill
(2)
Milliohmmeter - 0 to 0.1 ohm range
C.
Consumable Materials
(1)
A00247 Sealant - BMS 5-95
(2)
D00015 Grease - BMS 3-24
(3)
D00013 Grease - MIL-G-23827
(4)
G02185 Parting Agent
D.
References
(1)
AMM 12-22-31/301, Elevator Control System Lubrication
(2)
AMM 27-31-00/201, Elevator and Tab Control System
(3)
AMM 27-31-00/501, Elevator and Tab Control System
(4)
AMM 27-31-31/601, Elevator Tabs
E.
Access
(1)
Location Zone
711, 712 Elevator and Tab
(2)
Access Panels
3801/3802 Tail Cone Access Door
9143/9243 Removable Elevator Leading Edge Upper
F.
Procedure
(1)
Do this task: "Elevator Tab Inspection/Check" (AMM 27-31-31/601).
(2)
Make sure the quantity of tab adjust weights agrees with Fig. 403.
S 224-014
S 864-015
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737-300/400/500MAINTENANCE MANUAL
S 864-016
(3)
For Balance Bay 2, do a check for the quantity of tab adjust weights that are installed on the elevator.
S 434-013
(4)
If you removed the hinge bearing fitting, install the hinge bearing fitting (CMM 55-20-16).
(a)
Apply grease on the hinge bearing.
(b)
Install the hinge fitting to the elevator tab: 1) Lubricate the hinge fitting (AMM 12-22-31/301). 2) Temporarily install the hinge fitting and the shims in the
tab rear spar. 3) Drill the holes in shims and the hinge fitting to align with the locations in the tab. 4) Remove the elevator tab and disassemble the shims and
fittings. 5) Install the nutplates on the hinge fittings. 6) Apply parting agent to the tab spar in the fitting area. 7) Install the shims and the fitting with sealant on the
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