(a)
Put the stab trim in an airplane nose up positon.
(b)
Put the STAB TRIM MAIN ELEC and AUTOPILOT Cutout switches on the control stand to CUTOUT position.
(c)
Put a INOP-DO NOT MOVE Tag on the stab trim control wheels.
(d)
Put the manual control lever to the HIGH position as follows (Fig./201). 1) Remove the manual control lever retaining bolt. 2) Turn the manual control lever to the HIGH position. 3) Install the manual control lever retaining bolt, including
nut lockwire that was removed.
(e)
Remove the INOP-DO NOT MOVE Tag and put the cutout and stab trim switches back to there original position.
TASK 27-21-96-442-020
3. Pressure Reducer Activation___________________________
A. References
(1)
AMM 27-21-00/201, Rudder and Rudder Trim Control System
(2)
AMM 29-09-00/201, Hydraulic Reservoir Pressurization System
B.
Access
(1)
Location Zone
701 Tail Compartment
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27-21-96
ú ú 01 Page 201 ú Nov 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
PRESSURE
SEE A REDUCER BSEE HYDRAULIC LINES
STA
1104
MANUALSTA CONTROL1104 LEVER
SEE C
FWD
A
NORMAL POSITION
HYDRAULIC LINES
MANUAL CONTROL LEVER RETAINING BOLT
PRESSURE
FWD REDUCER HIGH PRESSURE POSITION
PRESSURE REDUCER MANUAL CONTROL LEVER
BC
Rudder Pressure Reducer Installation Figure 201
L86639
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ú ú 01 Page 202 ú Nov 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
(2)
Access Panels
3701 Stabilizer Trim Access Door
C.
Procedure
S 012-016
(1)
Get access to the tail compartment through access door 3701.
S 442-018
(2)
Do these steps to activate the pressure reducer.
(a)
Put the stab trim in an nose up position.
(b)
Put the STAB TRIM MAIN ELEC and AUTO PILOT Cutout Switches on the control stand to the CUTOUT position.
(c)
Put a INOP-DO NOT MOVE Tag on the stab trim control wheels.
(d)
Re-positon the manual control lever to the NORMAL position as follows. 1) Remove the manual control lever retaining bolt. 2) Turn the manual control lever to the NORMAL position
(Fig./201). 3) Install the manual control lever retaining bolt, including nut lockwire that was removed. 4) Remove the INOP-DO NOT MOVE Tag and put the cutout and stab trim switches back to there original position.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH A RUDDER PRESSURE REDUCER ú
27-21-96
ú ú 01 Page 203 ú Nov 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
RUDDER PRESSURE REDUCER - REMOVAL/INSTALLATION
______________________________________________
1. General_______
A. This procedure has two tasks, one for the removal and one for the installation of the pressure reducer for the rudder.
TASK 27-21-96-004-001
2. Pressure Reducer Removal________________________
A. References
(1)
AMM 27-21-00/201, Rudder and Rudder Trim Control System
(2)
AMM 29-09-00/201, Hydraulic Reservoir Pressurization System
B.
Access
(1)
Location Zone
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