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(ag) Place speed brake handle in down position. Check that ARMED light goes off and DO NOT ARM light remains off.
(ah) Depress and hold speed brake indicator test switch No. 3 for approximately 2 seconds. Check that speed brake ARMED and DO NOT ARM lights remain off.
(ai)  Move speed brake handle to ARMED position and check that ARMED light comes on and DO NOT ARM light remains off.
(aj)  Press and then release GROUND SENSING TEST switch on the front of the landing gear electrical module. Check that ARMED light goes off and remains off for 2 to 6 seconds after switch is released and then comes on. Check that DO NOT ARM light comes on and remains on for 2 to 6 seconds after switch is released and then goes off.
(ak) Press and then release AIR SENSING TEST switch. Check that ARMED light goes off and remains off for 2 to 6 seconds after switch is released and then comes on. Check that DO NOT ARM light comes on and remains on for 2 to 6 seconds after switch is released and then goes off.
(al)  Place speed brake handle in DN position. Check that ARMED light goes off and DO NOT ARM light remains off.
(am) Place tester master switch in OFF position and disconnect tester from antiskid module.
(7)  
Test stall warning function of landing gear electrical module.

(a)  
Check that STALL WARNING DC & STALL WARNING AC circuit breakers on panel P18, 28 VOLT DC NO. 1 ELECTRONIC BUS and No. 1 ELECTRONIC AC BUS circuit breakers on panel P6 are closed. Check that stall warning OFF light in panel P5 is on.

(b)  
Press AIR SENSING TEST switch on the front of landing gear electrical module. Check that stall warning OFF light goes off.

(c)  
Release AIR SENSING TEST switch and check that stall warning OFF light comes on.

(d)  
Press the GOUND SENSING TEST switch on the landing gear electrical module. Check that stall warning OFF light goes off.

(e)  
Release the GROUND SENSING TEST switch and check that stall warning OFF light comes on.

 

(8)  
Test landing gear control lever lock function of landing gear electrical module.

(a)  
Check that LEVER LATCH and PRESS WARN, TEST, and INDICATOR LIGHTS circuit breakers on P6 panel are closed.

(b)  
Check that landing gear control lever is in DN position.

(c)  
Hold a slug against the sensitive surface of the air-sensing sensor. Check that lever lock solenoid energizes and that landing gear control lever moves freely to UP without using override trigger.

(d)  
Remove slug from sensor and return landing gear control lever to DN position.

 

(9)  
Test flight recorder function of landing gear electrical module.

(a)  
Check that standby bus power ac and No. 1 transfer bus circuit breakers on panel P6 and flight recorder circuit breakers on P18 panel are closed. Check that FLIGHT RECORDER FAILURE light is on.

(b)  
Press the GROUND SENSING TEST switch on the landing gear electrical module. Check that FLIGHT RECORDER FAILURE light goes off.

(c)  
Release GROUND SENSING TEST switch. Check that FLIGHT RECORDER FAILURE light comes on.

 

(10)
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(11)
Test electrical system function of landing gear electrical module.

(a)  
Check that APU CONTROL, TRANSFER BUS DC INDICATION, No. 1 TRANSFER CONTROL, No. 2 TRANSFER CONTROL, GENERATOR CONTROL HOT BATTERY, FUELING and EXTERNAL CONTROL HOT BATTERY, No. 1 GENERATOR CONTROL, No. 2 GENERATOR CONTROL, and APU GENERATOR CONTROL circuit breakers located on panel P6 are closed.

(b)  
Check that ground power switch located on panel P5 is turned to ON position.

(c)  
With ground power supplying the electrical system and APU running, press the APU Generator No. 1 switch located on panel P5 to ON position and release.

(d)  
Check that APU Generator No. 2 BUS OFF light remains on; APU Generator No. 1 BUS OFF, APU Generator No. 1 TRANSFER BUS OFF, and APU Generator No. 2 TRANSFER BUS OFF lights located on panel P5 go off.

(e)  
Press and hold GROUND SENSING TEST switch on landing gear electrical module.

(f)  
Press APU Generator No. 2 switch located on panel P5 to ON position and release. Check that lights located on panel P5 are not affected.

(g)  
Release GROUND SENSING TEST switch and press APU Generator No. 2switch to ON position and release.

(h)  
Check that APU Generator No. 2 BUS OFF light goes off.

 

(12)
Test APU fire horn function of landing gear electrical module.

(a)  
Check that APU FIRE DETECTION and AURAL MASTER WARNING AND CONTROL circuit breakers on P6 panel are closed.

(b)  
Press and hold FIRE TEST switch on P8 module in FIRE position. Check that APU fire warning horn in main gear wheel well sounds. Check that APU remote fire light flashes intermittently.
　
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