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Figure 401 (Sheet 3 of 6)/27-31-91-990-801
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Elevator Neutral Shift Mechanism Installation
Figure 401 (Sheet 4 of 6)/27-31-91-990-801
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Elevator Neutral Shift Mechanism Installation
Figure 401 (Sheet 5 of 6)/27-31-91-990-801
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Elevator Neutral Shift Mechanism Installation
Figure 401 (Sheet 6 of 6)/27-31-91-990-801
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Stabilizer Trim Wheel Lock Installation
Figure 402/27-31-91-990-802
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TASK 27-31-91-400-801
3. Elevator Neutral Shift Mechanism Installation
(Figure 401)
A. References
Reference Title
27-31-00-700-810 Neutral Shift - Test (P/B 501)
27-31-00-820-804 Input Rods of the Elevator Neutral Shift Mechanism and Output Rod
of the Feel and Centering Unit - Adjustment (P/B 501)
27-31-00-840-802 Put the Elevator Systems A and B Back to the Condition Before the
Pressure Removal (P/B 201)
B. Tools/Equipment
NOTE: When more than one tool part number is listed under the same "Reference" number, the
tools shown are alternates to each other within the same airplane series. Tool part numbers
that are replaced or non-procurable are preceded by "Opt:", which stands for Optional.
Reference Description
SPL-1585 Kit - Rigging Pins, All Systems
(Part #: F70207-109, Supplier: 81205, A/P Effectivity: 737-600, -700,
-700C, -700ER, -700QC, -800, -900, -900ER, -BBJ)
SPL-1672 Assembly - Lock, Stabilizer Trim
(Part #: F71336-501, Supplier: 81205, A/P Effectivity: 737-100, -200,
-200C, -300, -400, -500, -600, -700, -700C, -700ER, -700QC, -800, -900,
-900ER, -BBJ)
C. Consumable Materials
Reference Description Specification
A00247 Sealant - Pressure And Environmental - Chromate
Type
BMS5-95
D. Location Zones
Zone Area
211 Flight Compartment - Left
212 Flight Compartment - Right
311 Area Aft of Pressure Bulkhead - Left
312 Area Aft of Pressure Bulkhead - Right
317 Tail Cone Compartment - Left
318 Tail Cone Compartment - Right
E. Access Panels
Number Name/Location
311BL Stabilizer Trim Access Door
318BR Tailcone Access Door
F. Neutral Shift Mechanism Installation
(Figure 401)
SUBTASK 27-31-91-640-001
(1) Do these steps to replace the bearings of the neutral shift mechanism [1]:
(a) Remove the outer housing bearing [15] from the short end of the neutral shift mechanism
[1].
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(b) Remove the bearing [16] from the short end of the neutral shift mechanism [1].
(c) Remove the outer housing bearing [14] from the long end of the neutral shift mechanism
[1].
(d) Remove the nut [21], washer [20], washer [19], and bolt [18] from the long end of the neutral
shift mechanism [1].
(e) Remove the bearing retainer [22] and bearing [16] from the neutral shift mechanism [1].
(f) Apply sealant, A00247 between each new bearing, their bearing housings and bearing
retainer.
(g) Install the bearings [16], bearing housing [14], bearing housing [15], and bearing retainer
[22] back on the neutral shift mechanism [1].
(h) Turn the bearing retainer [22] until you can install the bolt [18], washer [19] (under the bolt
head), washer [20] (under the nut), and the nut [21].
SUBTASK 27-31-91-420-001
(2) Install the neutral shift mechanism [1]:
(a) Put the neutral shift mechanism [1] between the support brackets.
1) Align the neutral shift mechanism [1] with the mach trim actuator.
　
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