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procedure.
C. The stabilizer trim actuator includes the ballnut, jackscrew, and jackscrew gearbox.
TASK 27-41-81-000-801
2. Stabilizer Ball Nut and Jackscrew Gearbox Removal
(Figure 401, Figure 402, Figure 403)
A. References
Reference Title
27-41-71-000-801 Stabilizer Trim Motor Removal (P/B 401)
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
COM-1557 Gauge - Force
(Part #: DG-200, Supplier: 92456, A/P Effectivity: 737-ALL)
(Part #: DPP-500G, Supplier: 92456, A/P Effectivity: 737-ALL)
(Part #: DPPH-150, Supplier: 92456, A/P Effectivity: 737-ALL)
(Part #: DPPH-50, Supplier: 92456, A/P Effectivity: 737-ALL)
(Part #: FDIX 100, Supplier: 0BFD9, A/P Effectivity: 737-ALL)
(Part #: FDIX 50, Supplier: 0BFD9, A/P Effectivity: 737-ALL)
(Part #: FDV 50, Supplier: 0BFD9, A/P Effectivity: 737-ALL)
(Opt Part #: FDI 100, Supplier: 0BFD9, A/P Effectivity: 737-ALL)
SPL-1569 Clamp - Control Cable
(Part #: A20005-9, Supplier: 81205, A/P Effectivity: 737-100, -200,
-200C, -300, -400, -500, -600, -700, -700C, -700ER, -700QC, -800, -900,
-900ER, -BBJ)
SPL-1678 Assembly - Lock, Horizontal Stabilizer
(Part #: F80027-13, Supplier: 81205, A/P Effectivity: 737-100, -200,
-200C, -300, -400, -500, -600, -700, -700C, -700ER, -700QC, -800, -900,
-900ER, -BBJ)
SPL-1684 Assembly - Wrench, Pinion Gear, Stabilizer Trim Actuator
(Part #: F71267, Supplier: 81205, A/P Effectivity: 737-100, -200, -200C,
-300, -400, -500, -600, -700, -700C, -700ER, -700QC, -800, -900, -900ER,
-BBJ)
(Opt Part #: F71252, Supplier: 81205, A/P Effectivity: 737-100, -200,
-200C, -300, -400, -500)
SPL-1728 Equipment - Handling, Stabilizer Jackscrew (Dome Pressure
Bulkhead)
(Part #: C27050-32, Supplier: 81205, A/P Effectivity: 737-600, -700,
-700C, -700ER, -700QC, -800, -900, -BBJ)
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
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BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
C. Location Zones
Zone Area
112 Area Forward of Nose Landing Gear Wheel Well
210 Subzone - Control Compartment - Body Station 178.00 to Body
Station 259.50
311 Area Aft of Pressure Bulkhead - Left
312 Area Aft of Pressure Bulkhead - Right
D. Access Panels
Number Name/Location
112A Forward Access Door
311BL Stabilizer Trim Access Door
E. Prepare for the Removal
SUBTASK 27-41-81-860-001
(1) Set the stabilizer leading edge to the full down (airplane nose up) position.
SUBTASK 27-41-81-860-002
(2) Open these circuit breakers and install safety tags:
CAPT Electrical System Panel, P18-1
Row Col Number Name
C 2 C00849 AFCS STABILIZER TRIM
F/O Electrical System Panel, P6-2
Row Col Number Name
B 10 C00207 FLIGHT CONTROL STAB TRIM CONT
D 10 C00840 FLIGHT CONTROL STAB TRIM ACTUATOR
SUBTASK 27-41-81-010-001
(3) To get access to the stabilizer forward control mechanism, do this step:
Open this access panel:
Number Name/Location
112A Forward Access Door
SUBTASK 27-41-81-010-002
(4) To get access to the stabilizer trim actuator, do this step:
Open this access panel:
Number Name/Location
311BL Stabilizer Trim Access Door
SUBTASK 27-41-81-820-001
CAUTION: MAKE SURE THE CHAIN IS LOOSE BEFORE YOU RELEASE THE CABLE TENSION.
TOO MUCH CABLE TENSION CAN CAUSE DAMAGE TO THE CHAIN.
(5) Adjust the upper adjusting nuts [5] of the aft support link [6] to loosen the chain (Figure 401).
SUBTASK 27-41-81-020-017
(6) Disconnect the upper turnbuckle [4].
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
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SUBTASK 27-41-81-020-001
(7) Loosen the lower turnbuckle [3] to release the tension of the STA cable [66] and STB cable [65]
(Figure 401).
SUBTASK 27-41-81-020-002
(8) Do this task: Stabilizer Trim Motor Removal, TASK 27-41-71-000-801.
F. Stabilizer Trim Actuator Removal
(Figure 402)
SUBTASK 27-41-81-020-003
(1) Remove the clamps [44] for the electrical connectors [47] from the jackscrew gearbox [24]:
(a) Remove the nuts [46], washers [45], and bolts [43] to remove the clamps [44] from the
jackscrew gearbox [24].
(b) Remove the electrical connectors [47] from the jackscrew gearbox [24].
　
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