TASK 32-61-01-722-069
 6.  Test of the Squat Sensor for the Nose Landing Gear__________________________________________________
 A. General
 (1)  
This test makes sure the Squat Sensor of the Nose Landing Gear operates correctly.

 (2)  
Do this test of the sensors with the landing gear in the down and locked position with the airplane on the ground.

 B.
References

 (1)  
AMM 09-11-00/201, Towing

 (2)  
AMM 24-22-00/201, Electrical Power

 C.
Equipment

 (1)  
A27092-84 - Proximity Sensors Actuator/Deactuator Set (Recommended)

 A32102-25 - Proximity Sensors Actuator/Deactuator Set
 (Alternative)
 A32102-1 - Proximity Sensors Actuator/Deactuator Set
 (Alternative)
 (Rectangular sensor actuator required) or
 (2)  KHT 8-750-01 Go-Gauge (Actuator), ELDEC Corporation, Aircraft Systems Division, PO Box 3002, Bothell, WA, 98041-3002
 (Rectangular sensor actuator required) (Optional to A32102-1)
 D. Access
 (1)  
Location Zone
 222 Control Cabin - RH
 715 Nose Landing Gear

 E.
Prepare the Airplane for the Test

 S 412-059
 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).

 (2)  
Supply electrical power (AMM 24-22-00/201).

 S 862-061
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 742-062
 (3)  Do these steps to prepare the CMC for the test (Fig. 202):
 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.

 (d)  
Push the line-select key, adjacent to the <INPUT MONITORING display.

 (e)  
Push the CDU keys E/070/270/00.

 (f)  
Push the key 1L.

 (g)  
Push the NEXT PAGE key.

 (h)  
Push the CDU keys E/070/272/00.

 S 722-070
 (4)  
Do the Test of the Squat 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 Squat Sensor (S800): Label 270/00

 -
For the Alternate Squat Sensor (S801): Label 272/00.

 (b)
Make sure the CDU display for the label 270/00 or 272/00 is

 shown as follows (Fig. 202): ~.............................................................. | Sensor and Bit Location |Bit State | Description | ................................................................ | Nose Gear Squat Sensor on Bit 21 | 0 | COMPRESSED | 2..................................…............…..............1

 (c)  
Put the actuator on the applicable sensor, S800 (Primary) or S801 (Alternate).

 (d)  
Make sure the CDU display for the label 270/00 or 272/00 is

 shown as follows (Fig. 202): ~............................................................... | Sensor and Bit Location |Bit State | Description | ................................................................. | Nose Gear Squat Sensor on Bit 21 | 1 | NOT COMPRESSED| 2..................................…............…...............1
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