R **ON A/C 051-099, 106-149, 151-199, 207-299, 301-399, 401-499,
 Subtask 26-21-00-020-051-A
 E. Aircraft Maintenance Configuration
 (1) In the engine pylon, on the engine fire extinguisher bottle, disconnect the electrical connectors from the cartridges:
 -
for the engine 1: 5WE1-A (bottle 1) and 7WE1-A (bottle 2)

 -
for the engine 2: 5WE2-A (bottle 1) and 7WE2-A (bottle 2).

 (2) Put a PLUG SHUNT (53100141-1) on the cartridges.
 **ON A/C ALL

 Subtask 26-21-00-420-051
 F. On the disconnected connectors, on the wiring side:
 -connect the pin 1 to an aircraft grounding point.
 -connect the pin 2 to an aircraft grounding point.
 Subtask 26-21-00-865-061

 G. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1WE1, 2WE1, 1WE2, 2WE2

 4. Procedure
_________
 Subtask 26-21-00-710-055
 A. Do this Test
 CAUTION : MAKE SURE YOU WILL NOT CAUSE UNWANTED CHANGES TO OTHER SYSTEMS
_______ BEFORE YOU PUSH THE ENG1(2) FIRE PUSHBUTTON SWITCH. WHEN YOU PUSH THE ENG1(2) FIRE PUSHBUTTON SWITCH:
 -THESE VALVES CLOSE . THE LP FUEL VALVE . THE HYDRAULIC FIRE VALVE . THE BLEED AIR VALVES . THE ANTI-ICE VALVES . THE AIR CONDITIONING PACK VALVES
 -THE GENERATOR STOPS.
 -------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
1. On the ENG/APU FIRE panel 1WD: On the ENG/APU FIRE panel 1WD:
 -push the ENG 1(2) TEST  - make sure that the defective SQUIB
 pushbutton switch.  legend of the AGENT 1(2) pushbutton switch does not come on (the non defective SQUIB legend comes on)
 -the SQUIB legend(s) go off.
 -release the ENG 1(2) TEST
 pushbutton switch.

 NOTE : If the defective SQUIB legend comes on:
____
 -replace the cartridge (Ref. TASK 26-21-41-000-001) and (Ref. TASK 26-21-41-400-001)
 -disconnect the pins 1 and 2 from the aircraft grounding points
 -remove the shunt devices from the cartridges
 -connect the connectors 5WE1-A (5WE2-A) and 7WE2-A (7WE2-A) to their cartridges
 -make sure that the connectors are correctly connected
 -do an operational test of the engine fire and overheat detection (Loop/Squib) (Ref. TASK 26-12-00-710-001)
 NOTE : If the defective SQUIB legend stays off:
____ -the fire test system is defective.
 -do the test that follows to make sure that the firing system operates correctly.
 1EFF : ALL 1 26-21-00Page 415 1 1 Feb 01/00R 1 1 1CES 1

 -------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
2. In the engine pylon: In the engine pylon:
 Connect a voltmeter between:  - the voltmeter must read OVDC.
 - the pin 1 and the grounding
 point
 - the pin 2 and the grounding
 point.
 On the ENG/APU FIRE pnnel 1WD:  - ignore the SQUIB legends.
 - open the guard of the ENG 1(2)
 FIRE pushbutton switch.
 - push then release the ENG 1(2)
 FIRE pushbutton switch.
 - push and hold the related AGENT  In the engine pylon, make sure that the
 1(2) pushbutton switch.  voltmeter reads 28VDC:
 - between pin 1 and the grounding
 point, and
 - between pin 2 and the grounding
 point.
 - Release the AGENT 1(2)  In the engine pylon, make sure that the
 pushbutton switch.  voltmeter reads OVDC:
 - between pin 1 and the grounding
 point, and
 - between pin 2 and the grounding
 point.
 - Push the ENG 1(2) FIRE
 pushbutton switch.
 NOTE : If the test is OK :____

 -the firing system is OK, the fire test system is defective, the aircraft can continue in service
 -disconnect the voltmeter
 -remove the shunt plugs from the cartridges
 -connect the connectors 5WE1-A (5WE2-A) and 7WE1-A (7WE2-A) to their cartridges
 -make sure that the connectors are correctly connected
 - on the ENG/APU FIRE panel 1WD, close the guard of the ENG 1(2) FIRE pushbutton switch.
 -do an operational test of the engine fire and overheat detection (Loop/Squib) (Ref. TASK 26-12-00-710-001)
R 1EFF : ALL 1 26-21-00Page 416 1 1 Feb 01/00 1 1 1CES 1

 -do an operational test of the hydraulic fire shut-off valves (Ref. TASK 29-10-00-710-001).
　
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