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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.
(2) 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 27-21-00-860-145-002
(3) Put the FLT CONTROL A and B switches, on the P5 panel, to the ON position.
SUBTASK 27-21-00-860-146-002
(4) Move the rudder pedals through 5 cycles of full travel.
SUBTASK 27-21-00-210-004-002
(5) Verify that the STBY RUD ON light on the overhead panel P5-3 is not illuminated.
SUBTASK 27-21-00-860-147-002
(6) Open these circuit breakers and install safety tags:
F/O Electrical System Panel, P6-2
Row Col Number Name
B 13 C00363 FLIGHT CONTROL SHUTOFF VALVES FLT CONT
C 13 C01074 FLIGHT CONTROL SHUTOFF VALVES FLT CONT
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 575
Oct 10/2007
D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
SUBTASK 27-21-00-860-148-002
(7) Put the FLT CONTROL B switch, on the P5 panel, to the STBY RUD position.
SUBTASK 27-21-00-210-005-002
(8) Verify that the STBY RUD ON light on the overhead panel P5-3 is illuminated.
SUBTASK 27-21-00-860-149-002
(9) Remove the safety tags and close these circuit breakers:
F/O Electrical System Panel, P6-2
Row Col Number Name
B 13 C00363 FLIGHT CONTROL SHUTOFF VALVES FLT CONT
C 13 C01074 FLIGHT CONTROL SHUTOFF VALVES FLT CONT
SUBTASK 27-21-00-860-150-002
(10) Open this circuit breaker and install safety tag:
F/O Electrical System Panel, P6-2
Row Col Number Name
C 11 C00362 FLIGHT CONTROL SHUTOFF VALVES STBY RUD
SUBTASK 27-21-00-010-032-002
(11) To gain access to the rudder main PCU, do this task:
Open these access panels:
Number Name/Location
324CL Vertical Fin, Access
324EL Vertical Fin, Access
SUBTASK 27-21-00-860-158-002
(12) Put the FLT CONTROL B switch, on the P5 panel, to the ON position.
SUBTASK 27-21-00-730-026-002
WARNING: FOLLOW THE STEPS IN THIS TASK EXACTLY IN THE ORDER THAT THEY ARE
WRITTEN. FAILURE TO DO SO CAN CAUSE INJURY TO PERSONS AND DAMGE TO
EQUIPMENT.
(13) Do the Force Fight Monitor test:
(a) Verify that the STBY RUD ON light and STANDBY HYD LOW PRESS light on the overhead
panel P5-3 are not illuminated
(b) Move the rudder pedals through 2 cycles of full travel.
NOTE: This will relieve any standby hydraulic system residual pressure.
1) If necessary, jiggle the rudder pedals to put the pedals to the neutral position.
(c) Manually hold the rudder main PCU upper control rod at location A (Figure 505) and pull aft
with sufficient force to break out the input override (approximately 30 lbs). Hold the control
rod in this position for at least 7 seconds then release.
(d) Verify that the STBY RUD ON light and STANDBY HYD LOW PRESS light on the overhead
panel P5-3 are illuminated.
NOTE: The standby hydraulic pumps will not activate.
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 576
Oct 10/2007
D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
(e) Remove the safety tag and close this circuit breaker:
F/O Electrical System Panel, P6-2
Row Col Number Name
C 11 C00362 FLIGHT CONTROL SHUTOFF VALVES STBY RUD
(f) Verify that the STANDBY HYD LOW PRESS light on the overhead panel P5-3 is not
illuminated.
NOTE: The standby hydraulic pumps will activate.
(g) Open this circuit breaker on the P6-2 panel for at least 2 seconds then close:
Open and close this circuit breaker:
F/O Electrical System Panel, P6-2
Row Col Number Name
D 15 C01628 FLIGHT CONTROL FORCE FIGHT MONITOR
(h) Verify that the STBY RUD ON light on the overhead panel P5-3 is not illuminated.
(i) Put the FLT CONTROL B switch, on the P5 panel, to the STBY RUD position.
(j) Open this circuit breaker and install safety tag:
F/O Electrical System Panel, P6-2
Row Col Number Name
C 11 C00362 FLIGHT CONTROL SHUTOFF VALVES STBY RUD
(k) Put the FLT CONTROL B switch, on the P5 panel, to the ON position.
(l) Move the rudder pedals through 2 cycles of full travel.
1) If necessary, jiggle the rudder pedals to put the pedals to the neutral position.
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL飞机维护手册2(78)
