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rudder 2.25 in. (5.72 cm) ±0.1 in. (0.25 cm) to the left side.
1) Verify that the force to move the rudder is less than 25 lbf (111 N).
(h) Use a block, STD-1278 and push/pull scale 0-25 pound (0-11 kilogram), STD-753 to move the
rudder 2.25 in. (5.72 cm) ±0.1 in. (0.25 cm) to the right side.
1) Verify that the force to move the rudder is less than 25 lbf (111 N).
(i) Remove the dial indicator, STD-1238 and block, STD-1278 from the rudder.
------------------------- END OF TASK ---------------------------
TASK 27-21-00-700-822-002
16. Main Rudder PCU Internal Hydraulic Leakage Test
(Figure 505)
A. General
(1) Use this task to do a check for excessive internal hydraulic leakage for the main rudder PCU.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN 006-099, 101-122; GUN 001-005, 155-157, 201-999
POST SB 737-27-1253
27-21-00
Config 2
Page 563
Oct 10/2007
D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
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)
C. Location Zones
Zone Area
117 Electrical and Electronics Compartment - Left
211 Flight Compartment - Left
212 Flight Compartment - Right
D. Access Panels
Number Name/Location
117A Electronic Equipment Access Door
324DL Trailing Edge Access
E. Prepare for the Main Rudder PCU Check
SUBTASK 27-21-00-840-014-002
(1) Make sure that these circuit breakers are closed:
F/O Electrical System Panel, P6-2
Row Col Number Name
C 9 C01447 FLIGHT CONTROL RUDDER AUTHORITY LIMITER
D 15 C01628 FLIGHT CONTROL FORCE FIGHT MONITOR
SUBTASK 27-21-00-840-015-002
(2) Open this access panel:
Number Name/Location
324DL Trailing Edge Access
SUBTASK 27-21-00-860-156-002
(3) Do this task: Supply Electrical Power, TASK 24-22-00-860-811.
SUBTASK 27-21-00-860-126-002
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.
(4) 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 27-21-00-860-128-002
(5) Put the FLT CONTROL A and B switches, on the P5-3 panel, to the ON position.
SUBTASK 27-21-00-980-003-002
(6) Move the rudder pedals through 5 cycles of full travel.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN 006-099, 101-122; GUN 001-005, 155-157, 201-999
POST SB 737-27-1253
27-21-00
Config 2
Page 564
Oct 10/2007
D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
SUBTASK 27-21-00-010-030-002
(7) To get access to the main electronics equipment compartment, do this task:
Open this access panel:
Number Name/Location
117A Electronic Equipment Access Door
SUBTASK 27-21-00-700-002-002
(8) Use a digital voltmeter to verify 4.5 Vdc to 5.5 Vdc between pin 18 and pin 20 of connector D10064
on the E1-EE shelf in the EE bay.
SUBTASK 27-21-00-210-003-002
(9) Verify that the STBY RUD ON light on the overhead panel P5-3 is not illuminated.
SUBTASK 27-21-00-860-129-002
(10) Put the FLT CONTROL A switch, on the P5-3 panel, to the OFF position.
F. Rudder main PCU system B Internal Leakage Check in the extend direction.
NOTE: You will need 3 persons to complete this task.
There is a time limit to complete some steps in this task.
SUBTASK 27-21-00-860-130-002
(1) Use the FSEU, located on the E-1 shelf in the main equipment center, to command the Rudder
Pressure Limiters (RPL) to the "LOW" pressure state. Do these steps:
NOTE: The command will remains active for only 75 seconds after it is set.
(a) Push the ON/OFF button on the front panel of the flap/slat electronics unit (FSEU), on E
shelf, to turn on the display.
NOTE: The display will show EXISTING FAULTS?
(b) Select OTHER FUNCTNS? from the MAIN MENU on the FSEU. The display will show SET
OUTPUTS?
(c) Select SET OUTPUTS? from the OTHER FUNCTNS? menu. The display will show RUD
PRES LIMIT?
(d) Select RUD PRES LIMIT? from the SET OUTPUTS? menu. The display will show SET ON?
　
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