(c)  
Press and hold AIR SENSING TEST switch on landing gear electrical module. Check that APU fire warning horn stops sounding but APU remote fire light continues to flash.

(d)  
Release both test switches. Check that horn remains silent and APU remote fire light stops flashing.

(13)
Test air conditioning turbofan function of landing gear electrical module.

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(a)  Check that OVERHEAT, LEFT RAM AIR ACTUATOR and RIGHT RAM AIR ACTUATOR circuit breakers on the P6 panel are closed.
May 15/69  32-09-100
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BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.

(b)  
Pressurize hydraulic systems A and B (Ref 29-11-0 and 29-12-0, MP).

(c)  
Extend flaps to the 15-unit position.

(d)  
Press and hold GROUND SENSING TEST switch on front of the landing gear electrical module. Check that ram air inlet deflector retracts.

(e)  
Release GROUND SENSING TEST switch. Check that ram air inlet deflector extends.

(f)  
Retract flaps fully.

(g)  
Depressurize hydraulic systems A and B (Ref 29-11-0 and 29-12-0, MP).

(14)
Test wing anti-ice function of landing gear electrical module.

(a)  
Perform the following steps before beginning the test: 1) Remove panel on lower surface of wing leading edge just outboard of engine

strut to access anti-ice thermal switches on each wing. 2) On left wing open connector D738 to switch S118 and jumper pin 1 and pin 2. 3) On right wing open connector D736 to switch S117 and jumper pin 1 and 2.

(b)  
Check that ENG NO. 1 & WING ANTI-ICE VALVE, ENG NO. 2 & WING ANTI-ICE VALVE, and ENG NO . 1 WING ANTI-ICE CONT. circuit breakers on P18 panel are closed.

(c)  
Turn on wing anti-ice switch on P5 panel. Check that left and right wing anti-ice VALVE OPEN lights on P5 panel come on and go bright, dim, bright.

(d)  
Press and hold GROUND SENSING TEST switch on the landing gear electrical module . Check that both right and left wing anti-ice VALVE OPEN lights go bright and then go off and that wing anti-ice switch turns to OFF.

(e)  
Release GROUND SENSING TEST switch. Check that VALVE OPEN lights remain off.

(f)  
Remove jumper wires from thermal anti-ice connnectors, hookup connectors and close panels.

(15)
Test hydraulic system interconnect valve function of landing gear electrical module.

(a)  
Check that GROUND INTERCONNECT VALVE circuit breaker on P6 panel is closed.

(b)  
Set parking brake.

(c)  
Place GROUND INTERCONNECT VALVE switch on P5 panel to OPEN position. Check that interconnect valve opens.

(d)  
Release parking brake. Check that interconnect valve closes.

(e)  
Reset parking brake. Check that interconnect valve opens.

(f)  
Press and hold GROUND SENSING TEST switch on landing gear electrical module. Check that interconnect valve closes.

(g)  
Release GROUND SENSING TEST switch. Check that interconnect valve opens.

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(16)
Test thrust reverser function of landing gear electrical module.

(a)  
Check that LIGHTS circuit breaker located on panel P6 is closed.

(b)  
Check that ENGINE - 1 THRUST REVERSER and ENGINE - 2 THRUST
REVERSER circuit breakers located on panel P6 are closed.

(c)  
Connect a voltmeter from ground to pin 13 of J2 test receptacle No. 1 located on the front of engine accessory module.

(d)  
Check that voltmeter indicates approximately 28 volts dc.

(e)  
Disconnect NOSE GEAR AIR/GROUND SWITCH from airplane wiring.

(f)  
Press AIR SENSING TEST switch on landing gear electrical module and check that voltmeter indicates less than 5 volts dc.

(g)  
Connect NOSE GEAR AIR/GROUND SWITCH to airplane wiring.

(h)  
Release AIR SENSING TEST switch and check that voltmeter indicates
approximately 28 volts dc.

(i)  
Disconnect ohmmeter from J2-13.

(j)  
Repeat steps (c) thru (g) using J3-13 instead of J2-13. Results should be the same.

(17)
Test cabin pressurization control function of landing gear electrica1 module.
　
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