W DOC AIRBUS | AMM A320F

Check Firing Circuit Continuity

TASK 26-23-00-720-001-A-01
Check Firing Circuit Continuity

CAUTION: BEFORE YOU INSTALL/REMOVE THE GSE-TOOL, READ THE INSTRUCTIONS IN THE APPLICABLE GSE INSTRUCTION MANUAL. WHILE YOU OPERATE THIS TOOL, CAREFULLY OBEY THEM. IF YOU DO NOT OBEY THE INSTRUCTIONS, DAMAGE TO EQUIPMENT CAN OCCUR.
ZONE: 132
ZONE: 162
ZONE: 172
1. Reason for the Job
Refer to the MPD TASK: 262300-02
CHECK FIRING CIRCUIT CONTINUITY
NOTE: There are alternative procedures for the check of firing circuit continuity. This task gives one of the procedures. For the other procedures, refer to the related task in this page block.
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
1
BOOMSET 600 OHMS
No specific
AR
CAP - BLANKING
No specific
AR
ELECTRICALLY GROUNDED WRIST STRAP
No specific
1
HEADSET 600 OHMS
No specific
AR
SAFETY CLIP - CIRCUIT BREAKER
10-101950-81
AR
SHUNT PLUG-FIRE EXTINGUISHER CARTRIDGE,HTL
2-100831-1
AR
PLUG-SHUNT
99L26208849001
1
TESTBOX-CIRCUIT, FES
M83723-60-110AN
AR
PROTECTIVE CAP-FIRE EXTINGUISHER CARTRIDGE
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
132
FORWARD CARGO COMPARTMENT
162
BULK CARGO COMPARTMENT
172
AFT CABIN U/FLOOR COMPARTMENT
161EC, 162CW
161DW
162AW
132MW
826
132SW
825
 C. Referenced Information
REFERENCE
DESIGNATION
TASK 24-41-00-861-002-A
Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01
Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02
Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A
De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01
De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02
De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 25-28-41-000-001-A
Removal of the Textile Floor Covering
TASK 25-28-41-400-001-A
Installation of the Textile Floor Covering
TASK 25-54-12-000-003-A
Removal of the Sidewall Panels in the Forward Cargo Compartment
TASK 25-54-12-400-003-A
Installation of the Sidewall Panels in the Forward Cargo Compartment
TASK 25-55-12-000-001-A
Removal of the Aft Cargo-Compartment Partition at FR65
TASK 25-55-12-000-003-A
Removal of the Sidewall Panels in the Aft Cargo Compartment - FR59/FR65
TASK 25-55-12-400-001-A
Installation of the Aft Cargo-Compartment Partition at FR65
TASK 25-55-12-400-003-A
Installation of the Sidewall Panels in the Aft Cargo Compartment - FR59/FR65
TASK 26-16-00-710-001-A
Operational Check of Cargo Compartment Smoke Detection by PTT
TASK 52-30-00-860-001-A
Open the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
TASK 52-30-00-860-002-A
Close the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
TASK 53-42-12-000-001-A
Removal of the Cabin Floor Panels from FR47 thru FR64
TASK 53-42-12-400-001-A
Installation of the Cabin Floor Panels from FR47 thru FR64
F Test Tool (99L26208849001 - TESTBOX-CIRCUIT, FES) ** ON A/C NOT FOR ALL
3. Job Set-up
Subtask 26-23-00-861-061-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
   (1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
Subtask 26-23-00-010-061-A ** ON A/C NOT FOR ALL
B. Get Access
   (1) Open forward cargo-compartment door 825 (Ref. AMM TASK 52-30-00-860-001).
   (2) Set CARGO COMPT LIGHT switch 6LU to the ON position.
   (3) Remove sidewall panel 132MW (Ref. AMM TASK 25-54-12-000-003).
Subtask 26-23-00-010-061-B ** ON A/C NOT FOR ALL
B. Get Access
   (1) Open forward cargo-compartment door 825 (Ref. AMM TASK 52-30-00-860-001).
   (2) Set CARGO COMPT LIGHT switch 6LU to the ON position.
   (3) Remove sidewall panel 132SW (Ref. AMM TASK 25-54-12-000-003).
Subtask 26-23-00-010-061-C ** ON A/C NOT FOR ALL
B. Get Access
   (1) Open aft cargo-compartment door 826 (Ref. AMM TASK 52-30-00-860-001).
   (2) Set CARGO COMPT LIGHT switch 8LU to the ON position.
   (3) Remove sidewall panel 162AW (Ref. AMM TASK 25-55-12-000-003).
Subtask 26-23-00-010-061-D ** ON A/C NOT FOR ALL
B. Get Access
   (1) Open aft cargo-compartment door 826 (Ref. AMM TASK 52-30-00-860-001).
   (2) Set CARGO COMPT LIGHT switch 8LU to the ON position.
   (3) Remove partition panel 161DW (Ref. AMM TASK 25-55-12-000-001).
Subtask 26-23-00-010-061-F ** ON A/C NOT FOR ALL
B. Get Access
   (1) For aircraft without Additional Center Tanks (ACT) 2, 3 and 5 installed:
     (a) Open aft cargo-compartment door 826 (Ref. AMM TASK 52-30-00-860-001).
     (b) Set CARGO COMPT LIGHT switch 8LU to the ON position.
     (c) Remove sidewall panel 162CW (Ref. AMM TASK 25-55-12-000-003).
   (2) For aircraft with ACT 2, 3 and 5 installed:
     (a) In the aft cabin, remove the center textile floor covering between Frames 62 and 64 (Ref. AMM TASK 25-28-41-000-001).
     (b) Remove floor panel 251DH (Ref. AMM TASK 53-42-12-000-001).
     (c) Remove access panel 161EC in the ceiling of the aft cargo compartment.
     (d) In the bulk cargo compartment, remove the sidewall panel 162CW (Ref. AMM TASK 25-55-12-000-003).
4. Procedure
Subtask 26-23-00-865-078-A ** ON A/C NOT FOR ALL
A. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUAIR COND/SDCU/CHAN111WQC06
** ON A/C NOT FOR ALL
49VUAIR COND/CIDS/SDF/DIR2 ESS18WHC06
49VUAIR COND/CIDS/SDF/DIR1 ESS15WHC05
** ON A/C NOT FOR ALL
49VUAIR COND/CARGO FIRE/EXTIG/BTL28WXC04
49VUAIR COND/CARGO/FIRE/EXTIG/BTL11WXC03
** ON A/C NOT FOR ALL
122VUAIR COND/SDCU/CHAN212WQT18
** ON A/C NOT FOR ALL
122VUAIR COND/CARGO/FIRE/EXTIG1WXT19
** ON A/C NOT FOR ALL
122VUAIR COND/CIDS/SDF/DIR NORM/214WHT18
122VUAIR COND/CIDS/SDF/DIR NORM/117WHT17
Subtask 26-23-00-020-057-A ** ON A/C NOT FOR ALL
B. Preparation for the Test
F Test Tool (99L26208849001 - TESTBOX-CIRCUIT, FES) ** ON A/C NOT FOR ALL
NOTE: For this test procedure, it is recommended that a minimum of two persons speak with each other through the service interphone system. One person to monitor cockpit overhead panel 22VU and the other person to be at zone 132.
   (1) On the CAPT jack panel, connect the HEADSET 600 OHMS to the related connector.
   (2) On overhead panel 50VU, make sure that the ON legend on the SVCE INT OVRD pushbutton switch is off.
   (3) In zone 132, connect the BOOMSET 600 OHMS to the service interphone jack.
   (4) Prepare the 99L26208849001 TESTBOX-CIRCUIT, FES (referred to as the test tool):
     (a) Make sure that the battery (9V) is in the battery housing.
     (b) Set the power switch to the ON position.
     (c) Make sure that the green led POWER is on.
     (d) Make sure that the voltmeter and the ammeter display units are on.
     (e) If necessary, push and hold the DISPLAY BACKLIGHT pushbutton:
       1 Make sure that the voltmeter and the ammeter display-unit lights are on.
     (f) Connect the correct adapter cable to the test tool.
   (5) At the fire extinguisher bottle:
WARNING: DO NOT TOUCH THE CARTRIDGE BEFORE YOU DO THE PROCEDURE APPLICABLE TO DEVICES THAT ARE SENSITIVE TO ELECTROSTATIC DISCHARGE. ELECTROSTATIC DISCHARGE CAN CAUSE THE FIRE EXTINGUISHER BOTTLE TO RELEASE ITS CONTENTS SUDDENLY AND CAUSE INJURY TO PERSONS.
     (a) Make sure that you are grounded with the ELECTRICALLY GROUNDED WRIST STRAP.
     (b) At the cartridges of the fire extinguisher bottle:
WARNING: BEFORE YOU TOUCH THE POWER DEVICE CARTRIDGE, MAKE SURE THAT YOU ARE GROUNDED AND THAT YOU INSTALL A SHUNT DEVICE ON IT. USE A CAP OR PLUG AS SHUNT DEVICE (THE CAP OR PLUG WILL SHUNT THE PINS TOGETHER ON THE CARTRIDGE). DO NOT USE A FOIL SHUNT. IF YOU TOUCH A POWER DEVICE CARTRIDGE THAT DOES NOT HAVE A SHUNT DEVICE INSTALLED, AN EXPLOSION CAN OCCUR AND CAUSE INJURIES TO YOU.
CAUTION: MAKE SURE THAT THE ELECTRICAL CONNECTORS ARE CLEAN BEFORE YOU DISCONNECT OR CONNECT THEM. CONTAMINATION ON THE ELECTRICAL CONNECTORS CAN CAUSE DAMAGE TO EQUIPMENT.
       1 Disconnect the electrical connectors from the cartridges as follows:
  • Electrical connector 4005WX-A from cartridge 4001WX
  • Electrical connector 4005WX-C from cartridge 4003WX.
       2 Put the 10-101950-81 SHUNT PLUG-FIRE EXTINGUISHER CARTRIDGE,HTL on the cartridges.
       3 Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
Subtask 26-23-00-020-057-C ** ON A/C NOT FOR ALL
B. Preparation for the Test
F Test Tool (99L26208849001 - TESTBOX-CIRCUIT, FES) ** ON A/C NOT FOR ALL
NOTE: For this test procedure, it is recommended that a minimum of two persons speak with each other through the service interphone system. One person to monitor cockpit overhead panel 22VU and the other person to be at zone 162.
   (1) On the CAPT jack panel, connect the HEADSET 600 OHMS to the related connector.
   (2) On overhead panel 50VU, make sure that the ON legend on the SVCE INT OVRD pushbutton switch is off.
   (3) In zone 162, connect the BOOMSET 600 OHMS to the service interphone jack.
   (4) Prepare the 99L26208849001 TESTBOX-CIRCUIT, FES (referred to as the test tool):
     (a) Make sure that the battery (9V) is in the battery housing.
     (b) Set the power switch to the ON position.
     (c) Make sure that the green led POWER is on.
     (d) Make sure that the voltmeter and the ammeter display units are on.
     (e) If necessary, push and hold the DISPLAY BACKLIGHT pushbutton:
       1 Make sure that the voltmeter and the ammeter display-unit lights are on.
     (f) Connect the correct adapter cable to the test tool.
   (5) At the fire extinguisher bottle:
WARNING: DO NOT TOUCH THE CARTRIDGE BEFORE YOU DO THE PROCEDURE APPLICABLE TO DEVICES THAT ARE SENSITIVE TO ELECTROSTATIC DISCHARGE. ELECTROSTATIC DISCHARGE CAN CAUSE THE FIRE EXTINGUISHER BOTTLE TO RELEASE ITS CONTENTS SUDDENLY AND CAUSE INJURY TO PERSONS.
     (a) Make sure that you are grounded with the ELECTRICALLY GROUNDED WRIST STRAP.
     (b) At the cartridges of the fire extinguisher bottle:
WARNING: BEFORE YOU TOUCH THE POWER DEVICE CARTRIDGE, MAKE SURE THAT YOU ARE GROUNDED AND THAT YOU INSTALL A SHUNT DEVICE ON IT. USE A CAP OR PLUG AS SHUNT DEVICE (THE CAP OR PLUG WILL SHUNT THE PINS TOGETHER ON THE CARTRIDGE). DO NOT USE A FOIL SHUNT. IF YOU TOUCH A POWER DEVICE CARTRIDGE THAT DOES NOT HAVE A SHUNT DEVICE INSTALLED, AN EXPLOSION CAN OCCUR AND CAUSE INJURIES TO YOU.
CAUTION: MAKE SURE THAT THE ELECTRICAL CONNECTORS ARE CLEAN BEFORE YOU DISCONNECT OR CONNECT THEM. CONTAMINATION ON THE ELECTRICAL CONNECTORS CAN CAUSE DAMAGE TO EQUIPMENT.
       1 Disconnect the electrical connectors from the cartridges as follows:
  • Electrical connector 4015WX-A from cartridge 4016WX
  • Electrical connector 4015WX-C from cartridge 4018WX.
       2 Put the 10-101950-81 SHUNT PLUG-FIRE EXTINGUISHER CARTRIDGE,HTL on the cartridges.
       3 Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
Subtask 26-23-00-020-057-D ** ON A/C NOT FOR ALL
B. Preparation for the Test
F Test Tool (99L26208849001 - TESTBOX-CIRCUIT, FES) ** ON A/C NOT FOR ALL
NOTE: For this test procedure, it is recommended that a minimum of two persons speak with each other through the service interphone system. One person to monitor cockpit overhead panel 22VU and the other person to be at zone 132.
   (1) On the CAPT jack panel, connect the HEADSET 600 OHMS to the related connector.
   (2) On overhead panel 50VU, make sure that the ON legend on the SVCE INT OVRD pushbutton switch is off.
   (3) In zone 132, connect the BOOMSET 600 OHMS to the service interphone jack.
   (4) Prepare the 99L26208849001 TESTBOX-CIRCUIT, FES (referred to as the test tool):
     (a) Make sure that the battery (9V) is in the battery housing.
     (b) Set the power switch to the ON position.
     (c) Make sure that the green led POWER is on.
     (d) Make sure that the voltmeter and the ammeter display units are on.
     (e) If necessary, push and hold the DISPLAY BACKLIGHT pushbutton:
       1 Make sure that the voltmeter and the ammeter display-unit lights are on.
     (f) Connect the correct adapter cable to the test tool.
   (5) At the fire extinguisher bottle:
WARNING: DO NOT TOUCH THE CARTRIDGE BEFORE YOU DO THE PROCEDURE APPLICABLE TO DEVICES THAT ARE SENSITIVE TO ELECTROSTATIC DISCHARGE. ELECTROSTATIC DISCHARGE CAN CAUSE THE FIRE EXTINGUISHER BOTTLE TO RELEASE ITS CONTENTS SUDDENLY AND CAUSE INJURY TO PERSONS.
     (a) Make sure that you are grounded with the ELECTRICALLY GROUNDED WRIST STRAP.
     (b) At the cartridges of the fire extinguisher bottle:
WARNING: BEFORE YOU TOUCH THE POWER DEVICE CARTRIDGE, MAKE SURE THAT YOU ARE GROUNDED AND THAT YOU INSTALL A SHUNT DEVICE ON IT. USE A CAP OR PLUG AS SHUNT DEVICE (THE CAP OR PLUG WILL SHUNT THE PINS TOGETHER ON THE CARTRIDGE). DO NOT USE A FOIL SHUNT. IF YOU TOUCH A POWER DEVICE CARTRIDGE THAT DOES NOT HAVE A SHUNT DEVICE INSTALLED, AN EXPLOSION CAN OCCUR AND CAUSE INJURIES TO YOU.
CAUTION: MAKE SURE THAT THE ELECTRICAL CONNECTORS ARE CLEAN BEFORE YOU DISCONNECT OR CONNECT THEM. CONTAMINATION ON THE ELECTRICAL CONNECTORS CAN CAUSE DAMAGE TO EQUIPMENT.
       1 Disconnect the electrical connectors from the cartridges as follows:
  • Electrical connector 4005WX-A from cartridge 4001WX
  • Electrical connector 4005WX-C from cartridge 4003WX.
       2 Put the 2-100831-1 PLUG-SHUNT on the cartridges.
NOTE: You can use the M83723-60-110AN PROTECTIVE CAP-FIRE EXTINGUISHER CARTRIDGE as an alternative to the 2-100831-1 PLUG-SHUNT.
       3 Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
Subtask 26-23-00-865-079-A ** ON A/C NOT FOR ALL
C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUAIR COND/CARGO FIRE/EXTIG/BTL28WXC04
49VUAIR COND/CARGO/FIRE/EXTIG/BTL11WXC03
** ON A/C NOT FOR ALL
122VUAIR COND/CARGO/FIRE/EXTIG1WXT19
Subtask 26-23-00-720-055-A ** ON A/C NOT FOR ALL
D. Functional Test of the Firing Circuit Continuity
F Test Tool (99L26208849001 - TESTBOX-CIRCUIT, FES) ** ON A/C NOT FOR ALL
WARNING: BEFORE YOU TOUCH THE POWER DEVICE CARTRIDGE, MAKE SURE THAT YOU ARE GROUNDED AND THAT YOU INSTALL A SHUNT DEVICE ON IT. USE A CAP OR PLUG AS SHUNT DEVICE (THE CAP OR PLUG WILL SHUNT THE PINS TOGETHER ON THE CARTRIDGE). DO NOT USE A FOIL SHUNT. IF YOU TOUCH A POWER DEVICE CARTRIDGE THAT DOES NOT HAVE A SHUNT DEVICE INSTALLED, AN EXPLOSION CAN OCCUR AND CAUSE INJURIES TO YOU.
WARNING: MAKE SURE THAT ALL THE ELECTRICAL CONNECTORS ARE DISCONNECTED FROM THE CARTRIDGES OF THE FIRE EXTINGUISHER BOTTLES BEFORE YOU DO THIS TEST. IF AN ELECTRICAL CONNECTOR IS CONNECTED, AN ACCIDENTAL EXPLOSION OF THE CARTRIDGE WILL OCCUR. THIS CAN CAUSE INJURY TO PERSONS.
WARNING: BEFORE YOU DISCONNECT THE ELECTRICAL CONNECTORS, IDENTIFY THEM. THEN, MAKE SURE THAT YOU DISCONNECT THE APPLICABLE ELECTRICAL CONNECTORS. A DISCHARGE OF THE FIRE EXTINGUISHING BOTTLE WILL OCCUR IF: - YOU DISCONNECT THE PRESSURE SWITCH CONNECTOR INSTEAD OF THE ELECTRICAL CONNECTOR, AND - THE "AGENT" PUSHBUTTON SWITCH IS PUSHED. THE DISCHARGE OF THE FIRE EXTINGUISHING BOTTLE CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.
   (1) Do this test:
ACTION
RESULT
1.In the cargo compartment, on the electrical connector 4005WX-C:
  • Remove the blanking cap and connect the adapter cable of the test tool.

2.In the cargo compartment, on the test tool:
  • Select PIN 1/2.
In the cargo compartment, on the test tool:
  • The green LED CURRENT IN is off.
  • The indication on the ammeter is less than 5 mA.
  • The indication on the voltmeter is less than 1 VDC.
3.On the cargo-smoke overhead panel 22VU:
In the cargo compartment, on the test tool:
  • Lift the guard, push and hold the FWD DISCH pushbutton-switch 3WX.
  • The green LED CURRENT IN comes on.
  • The indication on the ammeter is between 0.8 and 1.2 A.
  • The indication on the voltmeter is between 21 and 33 VDC.
  • Release the FWD DISCH pushbutton-switch 3WX.
  • The green LED CURRENT IN goes off.
  • The indication on the ammeter is less than 5 mA.
  • The indication on the voltmeter is less than 1 VDC.
WARNING: DO NOT CONNECT THE CONNECTOR TO THE CARTRIDGE BEFORE THE TEST IS COMPLETED. IF YOU OPERATE THE FIRE EXTINGUISHING SWITCH WHILE THE CONNECTOR IS CONNECTED, YOU WILL CAUSE A DISCHARGE OF THE FIRE EXTINGUISHER BOTTLE TO OCCUR.
4.Disconnect the adapter cable of the test tool.

5.Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
6.In the cargo compartment, on the electrical connector 4005WX-A:
  • Remove the blanking cap and connect the adapter cable of the test tool.

7.In the cargo compartment, on the test tool:
  • Select PIN 1/2 .
In the cargo compartment, on the test tool:
  • The green LED CURRENT IN is off.
  • The indication on the ammeter is less than 5 mA.
  • The indication on the voltmeter is less than 1 VDC.
8.On the cargo-smoke overhead panel 22VU:
  • Lift the guard, push and hold the AFT DISCH pushbutton-switch 4WX.
In the cargo compartment, on the test tool:
  • The green LED CURRENT IN comes on.
  • The indication on the ammeter is between 0.8 and 1.2 A.
  • The indication on the voltmeter is between 21 and 33 VDC.
  • Release the AFT DISCH pushbutton-switch 4WX.
  • The green LED CURRENT IN goes off.
  • The indication on the ammeter is less than 5 mA.
  • The indication on the voltmeter is less than 1 VDC.
WARNING: DO NOT CONNECT THE CONNECTOR TO THE CARTRIDGE BEFORE THE TEST IS COMPLETED. IF YOU OPERATE THE FIRE EXTINGUISHING SWITCH WHILE THE CONNECTOR IS CONNECTED, YOU WILL CAUSE A DISCHARGE OF THE FIRE EXTINGUISHER BOTTLE TO OCCUR.
9.Disconnect the adapter cable of the test tool.

10.Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
Subtask 26-23-00-720-055-C ** ON A/C NOT FOR ALL
D. Functional Test of the Firing Circuit Continuity
F Test Tool (99L26208849001 - TESTBOX-CIRCUIT, FES) ** ON A/C NOT FOR ALL
WARNING: BEFORE YOU TOUCH THE POWER DEVICE CARTRIDGE, MAKE SURE THAT YOU ARE GROUNDED AND THAT YOU INSTALL A SHUNT DEVICE ON IT. USE A CAP OR PLUG AS SHUNT DEVICE (THE CAP OR PLUG WILL SHUNT THE PINS TOGETHER ON THE CARTRIDGE). DO NOT USE A FOIL SHUNT. IF YOU TOUCH A POWER DEVICE CARTRIDGE THAT DOES NOT HAVE A SHUNT DEVICE INSTALLED, AN EXPLOSION CAN OCCUR AND CAUSE INJURIES TO YOU.
WARNING: MAKE SURE THAT ALL THE ELECTRICAL CONNECTORS ARE DISCONNECTED FROM THE CARTRIDGES OF THE FIRE EXTINGUISHER BOTTLES BEFORE YOU DO THIS TEST. IF AN ELECTRICAL CONNECTOR IS CONNECTED, AN ACCIDENTAL EXPLOSION OF THE CARTRIDGE WILL OCCUR. THIS CAN CAUSE INJURY TO PERSONS.
WARNING: BEFORE YOU DISCONNECT THE ELECTRICAL CONNECTORS, IDENTIFY THEM. THEN, MAKE SURE THAT YOU DISCONNECT THE APPLICABLE ELECTRICAL CONNECTORS. A DISCHARGE OF THE FIRE EXTINGUISHING BOTTLE WILL OCCUR IF: - YOU DISCONNECT THE PRESSURE SWITCH CONNECTOR INSTEAD OF THE ELECTRICAL CONNECTOR, AND - THE "AGENT" PUSHBUTTON SWITCH IS PUSHED. THE DISCHARGE OF THE FIRE EXTINGUISHING BOTTLE CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.
   (1) Do this test:
ACTION
RESULT
1.In the cargo compartment, on the electrical connector 4015WX-C:
  • Remove the blanking cap and connect the adapter cable of the test tool.

2.In the cargo compartment, on the test tool:
  • Select PIN 1/2.
In the cargo compartment, on the test tool:
  • The green LED CURRENT IN is off.
  • The indication on the ammeter is less than 5 mA.
  • The indication on the voltmeter is less than 1 VDC.
3.On the cargo-smoke overhead panel 22VU:
In the cargo compartment, on the test tool:
  • Lift the guard, push and hold the FWD DISCH pushbutton-switch 3WX.
  • The green LED CURRENT IN comes on.
  • The indication on the ammeter is between 0.8 and 1.2 A.
  • The indication on the voltmeter is between 21 and 33 VDC.
  • Release the FWD DISCH pushbutton-switch 3WX.
  • The green LED CURRENT IN goes off.
  • The indication on the ammeter is less than 5 mA.
  • The indication on the voltmeter is less than 1 VDC.
WARNING: DO NOT CONNECT THE CONNECTOR TO THE CARTRIDGE BEFORE THE TEST IS COMPLETED. IF YOU OPERATE THE FIRE EXTINGUISHING SWITCH WHILE THE CONNECTOR IS CONNECTED, YOU WILL CAUSE A DISCHARGE OF THE FIRE EXTINGUISHER BOTTLE TO OCCUR.
4.Disconnect the adapter cable of the test tool.

5.Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
6.In the cargo compartment, on the electrical connector 4015WX-A:
  • Remove the blanking cap and connect the adapter cable of the test tool.

7.In the cargo compartment, on the test tool:
  • Select PIN 1/2 .
In the cargo compartment, on the test tool:
  • The green LED CURRENT IN is off.
  • The indication on the ammeter is less than 5 mA.
  • The indication on the voltmeter is less than 1 VDC.
8.On the cargo-smoke overhead panel 22VU:
  • Lift the guard, push and hold the AFT DISCH pushbutton-switch 4WX.
In the cargo compartment, on the test tool:
  • The green LED CURRENT IN comes on.
  • The indication on the ammeter is between 0.8 and 1.2 A.
  • The indication on the voltmeter is between 21 and 33 VDC.
  • Release the AFT DISCH pushbutton-switch 4WX.
  • The green LED CURRENT IN goes off.
  • The indication on the ammeter is less than 5 mA.
  • The indication on the voltmeter is less than 1 VDC.
WARNING: DO NOT CONNECT THE CONNECTOR TO THE CARTRIDGE BEFORE THE TEST IS COMPLETED. IF YOU OPERATE THE FIRE EXTINGUISHING SWITCH WHILE THE CONNECTOR IS CONNECTED, YOU WILL CAUSE A DISCHARGE OF THE FIRE EXTINGUISHER BOTTLE TO OCCUR.
9.Disconnect the adapter cable of the test tool.

10.Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
Subtask 26-23-00-865-080-A ** ON A/C NOT FOR ALL
E. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUAIR COND/CARGO FIRE/EXTIG/BTL28WXC04
49VUAIR COND/CARGO/FIRE/EXTIG/BTL11WXC03
** ON A/C NOT FOR ALL
122VUAIR COND/CARGO/FIRE/EXTIG1WXT19
Subtask 26-23-00-420-057-A ** ON A/C NOT FOR ALL
F. After the Test Procedure
WARNING: DO NOT TOUCH THE CARTRIDGE BEFORE YOU DO THE PROCEDURE APPLICABLE TO DEVICES THAT ARE SENSITIVE TO ELECTROSTATIC DISCHARGE. ELECTROSTATIC DISCHARGE CAN CAUSE THE FIRE EXTINGUISHER BOTTLE TO RELEASE ITS CONTENTS SUDDENLY AND CAUSE INJURY TO PERSONS.
   (1) Make sure that you are grounded with the ELECTRICALLY GROUNDED WRIST STRAP.
   (2) Connect the electrical connectors as follows:
WARNING: BEFORE YOU TOUCH THE POWER DEVICE CARTRIDGE, MAKE SURE THAT YOU ARE GROUNDED AND THAT YOU INSTALL A SHUNT DEVICE ON IT. USE A CAP OR PLUG AS SHUNT DEVICE (THE CAP OR PLUG WILL SHUNT THE PINS TOGETHER ON THE CARTRIDGE). DO NOT USE A FOIL SHUNT. IF YOU TOUCH A POWER DEVICE CARTRIDGE THAT DOES NOT HAVE A SHUNT DEVICE INSTALLED, AN EXPLOSION CAN OCCUR AND CAUSE INJURIES TO YOU.
     (a) Remove the shunt devices from the cartridges.
     (b) Remove the CAP-BLANKING from each electrical connector and receptacle.
CAUTION: MAKE SURE THAT THE ELECTRICAL CONNECTORS ARE CLEAN BEFORE YOU DISCONNECT OR CONNECT THEM. CONTAMINATION ON THE ELECTRICAL CONNECTORS CAN CAUSE DAMAGE TO EQUIPMENT.
     (c) Connect the electrical connectors to the cartridges as follows:
  • Electrical connector 4005WX-A to cartridge 4001WX
  • Electrical connector 4005WX-C to cartridge 4003WX.
   (3) On the CAPT jack panel, disconnect the HEADSET 600 OHMS from the related connector.
   (4) In zone 132, disconnect the BOOMSET 600 OHMS from the service interphone jack.
Subtask 26-23-00-420-057-C ** ON A/C NOT FOR ALL
F. After the Test Procedure
WARNING: DO NOT TOUCH THE CARTRIDGE BEFORE YOU DO THE PROCEDURE APPLICABLE TO DEVICES THAT ARE SENSITIVE TO ELECTROSTATIC DISCHARGE. ELECTROSTATIC DISCHARGE CAN CAUSE THE FIRE EXTINGUISHER BOTTLE TO RELEASE ITS CONTENTS SUDDENLY AND CAUSE INJURY TO PERSONS.
   (1) Make sure that you are grounded with the ELECTRICALLY GROUNDED WRIST STRAP.
   (2) Connect the electrical connectors as follows:
WARNING: BEFORE YOU TOUCH THE POWER DEVICE CARTRIDGE, MAKE SURE THAT YOU ARE GROUNDED AND THAT YOU INSTALL A SHUNT DEVICE ON IT. USE A CAP OR PLUG AS SHUNT DEVICE (THE CAP OR PLUG WILL SHUNT THE PINS TOGETHER ON THE CARTRIDGE). DO NOT USE A FOIL SHUNT. IF YOU TOUCH A POWER DEVICE CARTRIDGE THAT DOES NOT HAVE A SHUNT DEVICE INSTALLED, AN EXPLOSION CAN OCCUR AND CAUSE INJURIES TO YOU.
     (a) Remove the shunt plugs from the cartridges.
     (b) Remove the CAP-BLANKING from each electrical connector and receptacle.
CAUTION: MAKE SURE THAT THE ELECTRICAL CONNECTORS ARE CLEAN BEFORE YOU DISCONNECT OR CONNECT THEM. CONTAMINATION ON THE ELECTRICAL CONNECTORS CAN CAUSE DAMAGE TO EQUIPMENT.
     (c) Connect the electrical connectors to the cartridges as follows:
  • Electrical connector 4015WX-A to cartridge 4016WX
  • Electrical connector 4015WX-C to cartridge 4018WX.
   (3) On the CAPT jack panel, disconnect the HEADSET 600 OHMS from the related connector.
   (4) In zone 162, disconnect the BOOMSET 600 OHMS from the service interphone jack.
Subtask 26-23-00-865-081-A ** ON A/C NOT FOR ALL
G. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUAIR COND/SDCU/CHAN111WQC06
** ON A/C NOT FOR ALL
49VUAIR COND/CIDS/SDF/DIR2 ESS18WHC06
49VUAIR COND/CIDS/SDF/DIR1 ESS15WHC05
** ON A/C NOT FOR ALL
49VUAIR COND/CARGO FIRE/EXTIG/BTL28WXC04
49VUAIR COND/CARGO/FIRE/EXTIG/BTL11WXC03
** ON A/C NOT FOR ALL
122VUAIR COND/SDCU/CHAN212WQT18
** ON A/C NOT FOR ALL
122VUAIR COND/CARGO/FIRE/EXTIG1WXT19
** ON A/C NOT FOR ALL
122VUAIR COND/CIDS/SDF/DIR NORM/214WHT18
122VUAIR COND/CIDS/SDF/DIR NORM/117WHT17
Subtask 26-23-00-710-060-A ** ON A/C NOT FOR ALL
H. Operational Test
   (1) Do the operational test of the cargo-compartment smoke-detection system with the Push-To-Test (PTT) pushbutton switch (Ref. AMM TASK 26-16-00-710-001).
5. Close-up
Subtask 26-23-00-410-066-A ** ON A/C NOT FOR ALL
A. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Install sidewall panel 132MW (Ref. AMM TASK 25-54-12-400-003).
   (3) Set CARGO COMPT LIGHT switch 6LU to the OFF position.
   (4) Close forward cargo-compartment door 825 (Ref. AMM TASK 52-30-00-860-002).
Subtask 26-23-00-410-066-B ** ON A/C NOT FOR ALL
A. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Install sidewall panel 132SW (Ref. AMM TASK 25-54-12-400-003).
   (3) Set CARGO COMPT LIGHT switch 6LU to the OFF position.
   (4) Close forward cargo-compartment door 825 (Ref. AMM TASK 52-30-00-860-002).
Subtask 26-23-00-410-066-C ** ON A/C NOT FOR ALL
A. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Install sidewall panel 162AW (Ref. AMM TASK 25-55-12-400-003).
   (3) Set CARGO COMPT LIGHT switch 8LU to the OFF position.
   (4) Close aft cargo-compartment door 826 (Ref. AMM TASK 52-30-00-860-002).
Subtask 26-23-00-410-066-D ** ON A/C NOT FOR ALL
A. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Install partition panel 161DW (Ref. AMM TASK 25-55-12-400-001).
   (3) Set CARGO COMPT LIGHT switch 8LU to the OFF position.
   (4) Close aft cargo-compartment door 826 (Ref. AMM TASK 52-30-00-860-002).
Subtask 26-23-00-410-066-F ** ON A/C NOT FOR ALL
A. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) For aircraft without ACT 2, 3 and 5 installed:
     (a) Install sidewall panel 162CW (Ref. AMM TASK 25-55-12-400-003).
     (b) Set CARGO COMPT LIGHT switch 8LU to the OFF position.
     (c) Close aft cargo-compartment door 826 (Ref. AMM TASK 52-30-00-860-002).
   (3) For the aircraft with ACT 2, 3 and 5 installed:
     (a) In the bulk cargo compartment, install sidewall panel 162CW (Ref. AMM TASK 25-55-12-400-003).
     (b) Install access panel 161EC in the ceiling of the aft cargo compartment.
     (c) In the cabin, install floor panel 251DH (Ref. AMM TASK 53-42-12-400-001).
     (d) Install the center textile floor covering between Frames 62 and 64 (Ref. AMM TASK 25-28-41-400-001).
Subtask 26-23-00-862-061-A ** ON A/C NOT FOR ALL
B. Put the aircraft back to its initial configuration.
   (1) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
[Rev.10 from 2021] 2026.03.31 23:45:55 UTC
"Aviabrain" 2025