(a)  
Make sure all green lights for the landing gear (on the P2 panel) are on.

 (b)  
Move the landing gear lever to the OFF position.

 1)  Make sure the red lights (on the P2 panel) for all the gear come on.

 (c)  
Put an actuator bar on the face of sensor S74 (uplock sensor for the right main gear).

 NOTE: Sensor S74 is near the uplock hook for the right main
____
 gear.

 1)  Make sure the red light for the right main gear (on the P2 panel) goes off.
 (d)  Remove the actuator bar from the sensor S74.
 1)  Make sure the red light for the right main gear (on the P2 panel) comes on.
 S 844-026
 (3)  
Put the airplane in its initial condition.

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

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A
737-300/400/500MAINTENANCE MANUAL
 G.  Test for the M983 Circuit Card (Nose Gear Red Light and Takeoff Warning)______________________________
 S 844-027
 (1)  
Prepare to do the test:

 (a)  
Make sure the ground locks are installed on all the gear (AMM 32-00-01/201).

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

 (c)  
Supply hydraulic power to systems A and B (AMM 29-15-00/201).

 (d)  
Make sure these circuit breakers are closed on the P6 panel: 1) AURAL WARNING 2) LANDING GEAR AIR/GND RELAY & LTG

 (e)  
Do these steps to prevent the sound of the takeoff warning horn during the test: 1) Make sure the stabilizer arrow on the middle console is in

 the green band. 2) Make sure the speed brake lever is in the down position. 3) Put chocks under the wheels. 4) Release the parking brake.
 S 724-028
 (2)  
Do a test of the M983 circuit card:

 (a)  
Move the flap lever to the 15 unit position.

 (b)  
Make sure the landing gear lever is in the OFF position.

 (c)  
Move the two throttles to the fully forward position.

 (d)  
Move the landing gear lever to the DN position.

 1)  Make sure the red lights (on the P2 panel) for all the gear go off.

 (e)  
Move one of the two throttles to the idle position.

 (f)  
Put a deactuator bar on the face of sensor S846 (lock sensor for the nose gear). 1) Make sure the red light for the nose gear (on the P2 Panel)

 comes on. 2) Make sure the green light for the nose gear (on the P2 Panel) goes off.

 (g)  
Remove the deactuator bar from the sensor S846. 1) Make sure the red light for the nose gear (on the P2 Panel) goes off.

 2)  Make sure the green light for the nose gear (on the P2 Panel) comes on.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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A 737-300/400/500MAINTENANCE MANUAL
 (h)  
Fully retract the flaps.

 (i)  
Make sure that one of the two throttles is fully forward. 1) Make sure you hear the aural warning horn intermittently.

 (j)  
Push and hold the AIR SENSE switch on the front of the module (E-11 shelf). 1) Make sure the aural warning horn stops.

 (k)  
Release the AIR SENSE switch. 1) Make sure you hear the aural warning horn intermittently.

 S 844-029
 (3)  
Put the airplane in its initial condition.

 (a)  
Set the parking brake.

 (b)  
Move the two throttles to the idle position.

 (c)  
Move the flap lever to the UP position.

 (d)  
Remove hydraulic power from systems A and B, if it is not necessary (AMM 29-15-00/201).

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