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has to be repeated.
1) Make a record of the rudder position on the dial indicator.
(h) Make sure the difference between the two left positions is not more than 0.03 inch (0.7
millimeter).
1) If the difference is more than 0.03 in. (0.8 mm), repeat the freeplay check.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN 001-005, 155-157, 201-999 PRE SB 737-27-1253 27-21-00
Config 1
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(i) Remove the dial indicator, STD-1238 from the rudder.
SUBTASK 27-21-00-860-093-001
(3) Do this task: Put the Rudder Hydraulic systems A, B, and Standby Back to the Condition
Before the Pressurization, TASK 27-21-00-840-801.
------------------------- END OF TASK ---------------------------
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN 001-005, 155-157, 201-999 PRE SB 737-27-1253 27-21-00
Config 1
Page 538
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D633A101-GUN
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Rudder Hinge and PCU Bearing Freeplay Check
Figure 503/27-21-00-990-819-001
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN 001-005, 155-157, 201-999 PRE SB 737-27-1253 27-21-00
Config 1
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TASK 27-21-00-700-815-001
9. Rudder Centering Test
A. General
(1) Use this test to make sure the rudder is in its center position.
B. References
Reference Title
24-22-00-860-811 Supply Electrical Power (P/B 201)
24-22-00-860-812 Remove Electrical Power (P/B 201)
27-21-00-800-801 Rudder Hydraulic System A, B, or Standby Pressurization (P/B 201)
27-21-00-840-801 Put the Rudder Hydraulic systems A, B, and Standby Back to the
Condition Before the Pressurization (P/B 201)
34-21-00-820-801 Air Data Inertial Reference System - Alignment from the FMC CDU
(P/B 201)
34-21-00-820-802 Air Data Inertial Reference System - Alignment from the ISDU
(P/B 201)
C. Location Zones
Zone Area
211 Flight Compartment - Left
212 Flight Compartment - Right
325 Vertical Fin - Rudder
D. Procedure
SUBTASK 27-21-00-860-094-001
WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF ALL CONTROL
SURFACES BEFORE YOU SUPPLY HYDRAULIC POWER. AILERONS, RUDDER,
ELEVATORS, FLAPS, SPOILERS, SLATS, AND THRUST REVERSERS CAN MOVE
QUICKLY WHEN YOU SUPPLY HYDRAULIC POWER. THIS CAN CAUSE INJURY TO
PERSONS AND DAMAGE TO EQUIPMENT.
(1) Pressurize the rudder hydraulic systems A and B. To pressurize them, do this task: Rudder
Hydraulic System A, B, or Standby Pressurization, TASK 27-21-00-800-801.
SUBTASK 27-21-00-860-095-001
(2) Do this task: Supply Electrical Power, TASK 24-22-00-860-811.
SUBTASK 27-21-00-860-096-001
(3) Align the ADIRS. To align the ADIRS, do this task: Air Data Inertial Reference System -
Alignment from the ISDU, TASK 34-21-00-820-802 or Air Data Inertial Reference System -
Alignment from the FMC CDU, TASK 34-21-00-820-801.
SUBTASK 27-21-00-730-018-001
(4) Do the test of the rudder centering test:
(a) Make sure the rudder is in the neutral position.
1) If it is necessary, move the rudder pedals lightly to set the rudder to the neutral
position.
(b) Make sure that the rudder trim indicator is at 0.0 +/- 0.25 units of trim.
(c) Move the captain’s left rudder pedal approximately 0.5 in. (12.7 mm) forward and release.
1) Make sure the rudder goes back to the neutral position.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN 001-005, 155-157, 201-999 PRE SB 737-27-1253 27-21-00
Config 1
Page 540
Jun 10/2007
D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
(d) Move the captain’s right rudder pedal approximately 0.5 in. (12.7 mm) forward and release.
1) Make sure the rudder goes back to the neutral position.
(e) Set FLT CONTROL A and B switches to the STBY RUD position.
1) Make sure that the STANDBY HYD LOW PRESSURE light on the P5-3 panel
extinguishes.
(f) Set the YAW DAMPER switch on the P5-3 overhead panel to the ON position.
(g) Do these steps to initiate a zero yaw damper command output from the stall Management
Yaw Damper No. 2 (SMYD No. 2), M1748:
NOTE: The SMYD No. 2 is installed on the E3-2 electrical equipment rack.
1) Push and release the ON/OFF button on the front BITE display of the SMYD No. 2.
2) Push and release the up arrow or down arrow button until the GROUND TEST shows on
　
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