S 412-062
 WARNING: MAKE SURE THE GROUND LOCKS AND THE STEERING LOCKOUT PIN ARE
_______ INSTALLED ON THE NOSE GEAR. AN ACCIDENTAL RETRACTION OF THE LANDING GEAR OR TURN OF THE NOSE WHEEL CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (1)  Make sure the ground locks and steering lockout pin are installed on the nose gear (AMM 09-11-00/201).
 S 412-063
 WARNING:_______OBEY THE INSTALLATION PROCEDURE FOR THE DOOR LOCKS. THE DOORS OPEN AND CLOSE QUICKLY. THE MOVEMENT OF THE DOORS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (2)  
Install the door locks for the nose gear (AMM 32-00-30/201).

 S 862-064

 (3)  
Supply electrical power (AMM 24-22-00/201).

 (4)
Do these steps that follow to prepare for the test (Fig. 202):

 S 742-065
 NOTE: This test uses the CMCs.
____
 (a)  
Push the MENU key on the CDU to get the CDU MENU.

 (b)  
Push the line-select key, adjacent to the <CMC display.

 (c)  
Push the line-select key, adjacent to the <OTHER FUNCTIONS display.

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A 747-400 MAINTENANCE MANUAL
"INPUT MONITORING" DISPLAY

LINE SELECT KEYS (LSK)
CDU
Test of the Nose Landing Gear Up Sensor with the CMC
Figure 202

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A42727
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747-400 MAINTENANCE MANUAL
 (d)  
Push the line-select key, adjacent to the <INPUT MONITORING display.

 (e)  
Push the CDU keys E/070/271/00.

 (f)  
Push the key 1L.

 (g)  
Push the NEXT PAGE key.

 (h)  
Push the CDU keys E/070/273/00.

 S 742-066
 (5)  
Do the Test of the Up Sensor for the Nose Landing Gear:

 (a)  
Push the PREVIOUS PAGE key or the NEXT PAGE key as necessary to show the logic condition that follows:

 -
For the Primary Up Sensor (S396): Label 271/00

 -
For the Alternate Up Sensor (S411): Label 273/00.

 (b)  
Make sure the CDU display for the label 271/00 or 273/00 is shown as follows (Fig. 202): 1) NOSE GEAR UP/LOCK on Bit 19 - Bit State 0

 (c)  
Put the actuator on the applicable sensor, S396 (Primary Up Sensor) or S411 (Alternate Up Sensor) to simulate an up position.

 (d)  
Make sure the CDU display for the label 271/00 or 273/00 is shown as follows (Fig. 202): 1) NOSE GEAR UP/LOCK on Bit 19 - Bit State 1

 (e)  
Remove the actuator from the sensor, S396 (Primary Up Sensor) or S411 (Alternate Up Sensor).

 (f)  
Push the line-select key, adjacent to the <RETURN display until the CDU MENU shown.

 F.
Put the Airplane in Its Usual Condition

 S 092-070
 WARNING:_______OBEY THE REMOVAL PROCEDURE FOR THE DOOR LOCKS. THE DOORS OPEN AND CLOSE QUICKLY. THE MOVEMENT OF THE DOORS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (1)  Remove the door locks for the landing gear and close the doors (AMM 32-00-30/201).
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747-400 MAINTENANCE MANUAL
 S 092-068
 (2)  
Remove the steering lockout pin (AMM 09-11-00/201).

 S 862-069

 (3)  
Remove electrical power if it is not necessary (AMM 24-22-00/201).
　
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