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 (a)  Make sure all engine and APU bottle discharge lights on the fire control module (M7326) come on.
 S 865-039
 (24) Release the MASTER DIM & TEST switch S6 on the M7262 module.
 (a)  Make sure all engine and APU bottle discharge lights go off.
 E. Test the solenoids that release the fire handles.
 S 865-181
 WARNING: MAKE SURE TO OPEN THE APPLICABLE ENGINE IGNITION CIRCUIT
_______ BREAKERS BEFORE YOU OPEN THE ENGINE FUEL CONTROL VALVE CIRCUIT BREAKERS. FAILURE TO OPEN CIRCUIT BREAKERS CAN RESULT IN AUTOMATIC FIRING OF THE IGNITER PLUGS. WITH FUEL IN THE COMBUSTION CHAMBER, INTERNAL ENGINE OR TAILPIPE FIRE CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (1)  Open these circuit breakers and attach DO-NOT-CLOSE tags:
 (a)  P6 Main Power Distribution Panel
 1) 6F1, IGN 1 ENG 1
 2) 6K19, IGN 2 ENG 1
 3) 6G19, STBY IGN ENG 1
 4) 6F2, IGN 1 ENG 2
 5) 6K20, IGN 2 ENG 2
 6) 6G20, STBY IGN ENG 2
 7) 6F3, IGN 1 ENG 3
 8) 6K21, IGN 2 ENG 3
 9) 6G21, STBY IGN ENG 3
 10) 6F4, IGN 1 ENG 4
 11) 6K22, IGN 2 ENG 4
 12) 6G22, STBY IGN ENG 4

 S 865-179
 WARNING: IF THE FUEL CONT VALVE CIRCUIT BREAKERS ARE CLOSED, FUEL WILL
_______ FLOW INTO THE ENGINES WHEN THE FUEL CONTROL SWITCHES, ON THE ISLE STAND, ARE PUT IN THE RUN POSITION. AN INTERNAL ENGINE FIRE OR HOT START MAY RESULT IN INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (2) Open these circuit breakers and attach DO-NOT-CLOSE identifiers:
 (a)  P6 Main Power Distribution Panel
 1) 6L10, FUEL CONT VALVE ENG 1

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747-400 MAINTENANCE MANUAL
 2) 6L11, FUEL CONT VALVE ENG 2
 3) 6L12, FUEL CONT VALVE ENG 3
 4) 6L13, FUEL CONT VALVE ENG 4

 S 865-043
 (3)  Try to pull these fire handles on the Fire Control Module:
 (a)  
APU

 (b)  
Engine 1

 (c)  
Engine 2

 (d)  
Engine 3

 (e)  
Engine 4

 (f)  
Make sure all five fire switches stay locked in place.

 S 755-044
 (4)  Push and hold the FIRE/OVHT test switch on the M7317 (P5 panel).
 (a)  Make sure the red lights on the APU, engine 1, 2, 3, and 4 fire switches, on the P5 pilots overhead panel, come on.
 NOTE: The EICAS message TEST IN PROGRESS will be in view while
____ the test is in progress. The EICAS message FIRE TEST FAIL or TEST PASSED comes into view at the end of the test. The EICAS message FIRE TEST FAIL comes into view when circuit breakers are open or an actual fault exists on a related fire/overheat system.
 S 865-046
 (5)  
Pull the APU fire switch out; the lock should be released to permit the switch to move freely.

 S 865-047

 (6)  
Pull the engine 1 fire switch out; the lock should be released to permit the switch to move freely.

 S 865-048

 (7)  
Pull the engine 2 fire switch out; the lock should be released to permit the switch to move freely.

 S 865-049

 (8)  
Pull the engine 3 fire switch out; the lock should be released to permit the switch to move freely.

 S 865-050

 (9)  
Pull the engine 4 fire switch out; the lock should be released to permit the switch to move freely.

 S 865-051

 (10)
 Release the FIRE/OVHT test switch.

 (a)  Make sure the lights in the fire switch go off and the EICAS messages go out of view.
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747-400 MAINTENANCE MANUAL
 S 865-052
 (11) Push all five fire switches in to the closed position.
 F. Test the functions of the Engine fire handle
 S 865-216
　
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