(e)
Make sure the rod ends engage the control rod correctly: 1) Make sure you can see the threads of the rod ends through
the inspection holes in the rod. 2) Make sure you see less than ten threads past the checknuts.
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A
747-400 MAINTENANCE MANUAL
E. Put the Airplane Back to Its Usual Condition
S 415-031
(1)
Close the access panel 324UL.
S 865-020
(2)
Remove the systems No. 1, 2, 3 and 4 hydraulic power if it is not necessary (Ref 29-11-00/201).
S 865-021
(3)
Remove the electrical power if it is not necessary
(Ref 24-22-00/201).
S 095-027
WARNING:_______MAKE SURE THE NOSE WHEELS POINT FORWARD. IF THE NOSE WHEELS DO NOT POINT FORWARD, THE NOSE GEAR CAN QUICKLY TURN TO THE CENTERED POSITION WHEN YOU REMOVE THE TOW PIN. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(4)
Remove the TOW PIN from the nose landing gear (Ref 09-11-00/201).
S 715-028
(5)
Do the operational test of the upper rudder power control actuator.
TASK 27-21-15-715-023
3. Operational Test - Upper Rudder Power Control Actuator______________________________________________________
A. References
(1)
09-11-00/201, Towing
(2)
12-12-01/301, Hydraulic Systems
(3)
24-22-00/201 Manual Control
(4)
29-11-00/201 Main Hydraulic Supply System
(5)
31-61-00/201 Integrated Display System
B.
Access
(1)
Location Zone
221 Control Cabin, LH
222 Control Cabin, RH
C.
Prepare for the Operational Test
(1)
Supply the electrical power (Ref 24-22-00/201).
(2)
Make sure the EICAS is operational (Ref 31-61-00/201).
S 865-010
S 865-011
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747-400 MAINTENANCE MANUAL
S 865-012
WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF ALL CONTROL
_______ SURFACES BEFORE YOU SUPPLY HYDRAULIC POWER. AILERONS, RUDDERS, ELEVATORS, FLAPS, SPOILERS, LANDING GEAR AND THRUST REVERSERS CAN MOVE QUICKLY WHEN YOU SUPPLY HYDRAULIC POWER. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(3) Supply systems No. 1 and 3 hydraulic power (Ref 29-11-00/201).
S 495-030
WARNING:_______MAKE SURE THE NOSE WHEELS POINT FORWARD. IF THE NOSE WHEELS DO NOT POINT FORWARD, THE NOSE GEAR CAN QUICKLY TURN TO THE CENTERED POSITION WHEN YOU REMOVE THE TOW PIN. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(4) Install the TOW PIN at the steering metering valve for the nose landing gear (Ref 09-11-00/201).
NOTE: The nose gear will turn during the rudder operation if you do
____
not install the TOW PIN.
D. Operational Test of the Upper Rudder PCA
S 715-014
(1)
Do the test of the upper rudder upper actuator:
(a)
Put the FLT CONTROL HYD POWER - TAIL switch No. 3 on the P461 Pilot's Overhead Maintenance Panel in the SHUTOFF position.
(b)
Push the captain's left rudder pedal fully forward and hold it.
(c)
Make sure the EICAS status page shows that the upper rudder is at the left limit of the travel.
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