(a)  
To temporarily install a wing gear sensor, refer to the applicable steps in this procedure: Wing Gear Truck Tilt Sensors - Maintenance Practices (AMM 32-61-22/201).

 (b)  
To temporarily install a body gear sensor, refer to the applicable steps in this procedure: Body Gear Truck Tilt Sensors - Maintenance Practices (AMM 32-61-12/201).

 (c)  
To temporarily install a nose gear sensor, refer to the applicable steps in this procedure: Nose Gear Squat Sensor -Maintenance Practices (AMM 32-61-01/201).

 TASK 32-09-02-862-012
 4. Put the Air/Ground Relay System Back in the Ground Mode
_______________________________________________________
 A. References
 (1)  
AMM 07-11-01/201, Jacking Airplane

 (2)  
AMM 29-11-00/201, Main Hydraulic Supply System

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747-400
MAINTENANCE MANUAL

PRIMARY TRUCK TILT
SENSOR (S417 LEFT, S416 RIGHT)
ALTERNATE TILT SENSOR
(S615 LEFT, S614 RIGHT)

FWD INBD
WING GEAR
NOSE GEAR
SQUAT SENSORS

NOSE GEAR
Sensor Location Figure 201
H92129
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747-400
MAINTENANCE MANUAL

 B. Access
 (1)  
Location Zone
 715 Nose Landing Gear
 735 Left Wing Landing Gear
 745 Right Wing Landing Gear
 755 Left Body Landing Gear
 765 Right Body Landing Gear

 C.
Procedure

 S 082-013
 (1)  
Remove the proximity switch actuators from the sensors for the nose, wing, and body landing gear (If the actuators are on the sensors).

 S 582-014

 (2)  
Lower the airplane if it is on jacks (AMM 07-11-01/201).

 S 022-054

 (3)  
If a tilt sensor was temporarily attached to the airplane and air mode simulation is no longer required, then remove the sensor.

 TASK 32-09-02-862-016
 5. Put Safety-Sensitive Systems Back to the Condition Before Air Mode Simulation
_____________________________________________________________________________
 A. References
 (1)  
AMM 24-22-00/201, Manual Control

 (2)  
AMM 32-00-30/201, Landing Gear Door Locks

 B.
Procedure

 S 862-044
 (1)  Close all the circuit breakers that were opened in the task to Prepare the Safety-Sensitive Systems for Air Mode Simulation (first task).
 NOTE: The circuit breakers are on the P6, P7, P83, P180, P414,
____
 and P415 panels.

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747-400 MAINTENANCE MANUAL
 S 092-023
 WARNING: CAREFULLY DO THE SPECIFIED TASK TO REMOVE THE DOOR LOCKS FROM
_______ THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT REMOVE THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (2)  
Remove the door locks from the doors for the nose landing gear (AMM 32-00-30/201).

 S 092-025

 (3)  
Remove the door locks from the doors for the wing landing gear (AMM 32-00-30/201).

 S 092-033

 (4)  
Remove the door locks from the doors for the body landing gear (AMM 32-00-30/201).

 S 862-019

 (5)  
Remove electrical power if it is not necessary (AMM 24-22-00/201).

 TASK 32-09-02-862-058
　
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