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BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
Stabilizer Trim Jackscrew Adjustment
Figure 401 (Sheet 2 of 2)/27-31-20-990-801
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN ALL; AIRPLANES WITH ELEVATOR FEEL SHIFT
MODULE
27-31-20
Page 404
Oct 10/2003
D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
Elevator Feel Shift Module - Installation
Figure 402/27-31-20-990-802
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN ALL; AIRPLANES WITH ELEVATOR FEEL SHIFT
MODULE
27-31-20
Page 405
Oct 10/2003
D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
TASK 27-31-20-400-801
3. Elevator Feel Shift Module - Installation
(Figure 401, Figure 402)
A. References
Reference Title
24-22-00-860-812 Remove Electrical Power (P/B 201)
27-31-00-700-812 Feel Force System - Test (P/B 501)
27-31-00-800-802 Remove Pressure from the Elevator Hydraulic Systems A and B
(P/B 201)
27-31-20-740-801 Elevator Feel Shift Module - Test (P/B 501)
51-31-00-390-804 Fillet Seal Application (P/B 201)
B. Location Zones
Zone Area
117 Electrical and Electronics Compartment - Left
118 Electrical and Electronics Compartment - Right
211 Flight Compartment - Left
212 Flight Compartment - Right
311 Area Aft of Pressure Bulkhead - Left
312 Area Aft of Pressure Bulkhead - Right
C. Access Panels
Number Name/Location
311BL Stabilizer Trim Access Door
D. Prepare for the Installation
SUBTASK 27-31-20-860-005
(1) Make sure that the pressure to the elevator hydraulic systems A and B is removed. To remove it,
do this task: Remove Pressure from the Elevator Hydraulic Systems A and B,
TASK 27-31-00-800-802.
E. Elevator Feel Shift Module Installation
SUBTASK 27-31-20-420-001
(1) Install the elevator feel shift module [1]:
(a) Install the washers [3] and bolts [2] to attach the elevator feel shift module (EFSM) [1] to the
bracket.
1) Make sure that the electrical resistance between the EFSM and the bracket, that it is
attached to, is 0.005 ohms, or less.
2) Make sure that the electrical resistance between the EFSM and the airplane structure
is 0.005 ohms, or less.
a) If the electrical resistance at the two locations is more than 0.005 ohms, then
remove the EFSM and prepare the electrical faying surfaces.
(b) Apply a fillet seal of BMS 5-95 along the joint edges. To apply the sealant, do this task: Fillet
Seal Application, TASK 51-31-00-390-804.
SUBTASK 27-31-20-420-002
(2) Connect electrical connector [4] to the elevator feel shift module [1].
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN ALL; AIRPLANES WITH ELEVATOR FEEL SHIFT
MODULE
27-31-20
Page 406
Feb 10/2006
D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
SUBTASK 27-31-20-420-003
(3) Remove the caps and plugs from the open ports and hydraulic lines [4].
SUBTASK 27-31-20-420-005
(4) Connect the hydraulic lines [4] to the elevator feel shift module [1].
NOTE: Apply a layer of hydraulic fluid to the hydraulic fittings before you install the hydraulic
lines.
GUN ALL
SUBTASK 27-31-20-720-003
(5) Do the, do this task: Elevator Feel Shift Module - Test, TASK 27-31-20-740-801.
GUN ALL; AIRPLANES WITH ELEVATOR FEEL SHIFT MODULE
SUBTASK 27-31-20-720-001
(6) Do this task: Feel Force System - Test, TASK 27-31-00-700-812.
F. Put the Airplane Back to Its Usual Condition
SUBTASK 27-31-20-860-008
(1) Put the SYSTEM A FLIGHT CONTROL SHUTOFF and the SYSTEM B FLIGHT CONTROL
SHUTOFF switches on the P5 flight control panel, forward overhead panel to the ON position.
SUBTASK 27-31-20-860-009
(2) Put the STAB TRIM cutout switches on the pilots control stand panel to the NORM position.
SUBTASK 27-31-20-860-015
(3) Remove the safety tags and close these circuit breakers:
F/O Electrical System Panel, P6-2
Row Col Number Name
B 2 C01064 AFCS SYS B MACH TRIM DC
B 3 C01046 AFCS SYS B FCC DC
B 4 C00716 AFCS SYS B ENGAGE INTLK
B 10 C00207 FLIGHT CONTROL STAB TRIM CONT
C 1 C01037 AFCS SYS B MACH TRIM AC
C 2 C01042 AFCS SYS B SNSR EXC AC
D 10 C00840 FLIGHT CONTROL STAB TRIM ACTUATOR
F/O Electrical System Panel, P6-3
Row Col Number Name
D 13 C00311 INDICATOR MASTER DIM BUS 1
D 14 C00312 INDICATOR MASTER DIM BUS 2
SUBTASK 27-31-20-760-005
(4) Do this task: Remove Electrical Power, TASK 24-22-00-860-812.
　
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