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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 (c)  
The elapsed time indicator stops after 27 - 33 minutes.

 (d)  
Make sure the power lamps stay on.

 S 866-200
 (26)
 Push the FWD ARMED switch on the fire control module to the OFF position.

 S 866-201

 (27)
 Make sure the BOTTLE DISCHARGE light on the G26001 squib test box is on.

 S 976-213

 (28)
 Write the voltage shown on the multimeter (V1) connected to the G26001 test box.

 S 766-203

 (29)
 Set the toggle switch on the G26001 squib test box to the ON position.

 S 976-214

 (30)
 Write the voltage shown on the multimeter (V2) connected to the G26001 test box.

 S 766-205

 (31)
 Make sure the voltage V2 is not less than the value, shown in table 1 above, corresponding to the voltage V1 measured.

 S 766-206

 (32)
 Set the toggle switch on the G26001 squib test box to the OFF position.

 S 766-207

 (33)
 If the A26002 is used, put the POWER switch to the OFF position on the test box.

 S 866-208

 (34)
 Open these circuit breakers on P6 main power distribution panel and attach DO-NOT-CLOSE tags :

 (a)  6H6, FIRE EXTINGUISHER LOWER CARGO
 S 766-209
 (35)
 Disconnect the electrical connector, DM7908B, of bottle C from the G26001 test box.

 S 766-210

 (36)
 If the A26002 is used, do the following:

 (a)  Disconnect the electrical connector, DM7906B, of bottle A from the A26002 test box.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 26-23-05
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 (b)  Disconnect the electrical connector, DM6742B, of bottle D from the A26002 test box.
 F. Test of the Aft Squib
 S 486-185
 (1)  If the A26002 tool is used, do the following:
 (a)  
Connect the electrical connector, DM7906C, of the bottle A aft squib to the connector J2 on the test box for the time delay relay.

 (b)  
Connect the electrical connector, DM7908C, of the bottle C aft squib to the connector J1 on the test box.

 (c)  
Set the toggle switch on the squib test box to the OFF position.

 (d)  
Put the POWER switch to the ON position on the test box.

 (e)  
Push and release the TEST RELAY RESET switch on the test box.

 (f)  
Push and release the timer reset switch on the test box.

 S 486-184
 (2)  
Connect the electrical connector, DM6742C, of the bottle D aft squib to the connector G26001 the test box.

 S 866-037

 (3)  
Push the AFT ARMED switch on the fire control module.

 S 866-038

 (4)  
Push and release the DISCH switch on the fire control module to start the operation of the time delay relay.

 S 716-181

 (5)  
If the A26002 test tool is not used, make sure it takes 27 - 33 minutes for the voltage on the multimeter to reach 18 volts DC.

 (a)  
Start timer.

 (b)  
Make sure it takes 27 - 33 minutes for the voltage on the multimeter to reach 18 volts DC.

 S 716-039
 (6) If the A26002 test tool is used, make sure these indications occur:
 (a)  Make sure the power lamp on the test box is on.
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 26-23-05
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