SUDDENLY AND CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (3)  
Before you touch the squib, do the procedure for devices that are sensitive to electrostatic discharge (AMM 20-40-12/201).

 S 865-062

 (4)  
Remove the protective covers from the fire bottle squibs.

 S 865-068
 WARNING:_______MAKE SURE THERE IS NO VOLTAGE AT THE ELECTRICAL CONNECTOR. IF THERE IS A VOLTAGE AT THE ELECTRICAL CONNECTOR, THE SQUIB CAN RELEASE ITS CONTENTS SUDDENLY AND CAUSE INJURY TO PERSONS.
 (5)  Make sure there is no voltage between pins 1 and 2 of the electrical connector.
 NOTE: If you use a voltmeter, connect a 10 Kohm resistor across
____ the meter. You should read less than 1 volt.
 S 865-060
 (6)  
Make sure the squib electrical pins are not bent or damaged.

 S 865-065

 (7)  
Make sure the electrical connector is not damaged.

 NOTE: The squib pins can cause damage to the electrical
____ connector if the pins do not enter the connector receptacles.
 S 865-047
 (8)  
Disconnect the D594 connector from the test box and connect it to the squib on the APU fire extinguisher.

 S 865-048

 (9)  
Remove the DO-NOT-CLOSE tag and close the circuit breaker for the EXTINGUISHER BOTTLE APU.

 S 865-049

 (10)
 Close the 3701 and 3804 access doors.

 S 865-050

 (11)
 Move the EXT TEST SWITCH to position 1, on the P8-1 panel, and hold.

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737-300/400/500MAINTENANCE MANUAL
 S 755-051
 (12)
 Make sure the APU light (green) on the panel P8-1 goes on.

 S 865-053

 (13)
 Move the EXT TEST SWITCH to position 2 and hold.

 S 755-054

 (14)
 Make sure the APU light (green) on the P8-1 panel goes on.

 S 865-056

 (15)
 Remove power if it is not necessary (AMM 24-22-00 MP).

 TASK 26-22-00-795-057
 4.  Tubing Leakage Test___________________
 A. Procedure
 S 425-069
 (1) Tubing Leakage Test
 NOTE:  Make sure the connectors are correctly tightened at the bottle and at the APU shroud. No pressure test is necessary.
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737-300/400/500MAINTENANCE MANUAL
 APU FIRE EXTINGUISHER BOTTLE - REMOVAL/INSTALLATION
___________________________________________________
 1.  General
 A.  This subject has two tasks. The first task is the removal of the Fire Extinguisher Bottle for the APU.
 B.  The second task is the installation of the Fire Extinguisher Bottle for the APU.
 TASK 26-22-11-024-001
 2.  Removal - Fire Extinguisher Bottle for the APU______________________________________________
 A.  Reference
 (1) AMM 20-40-12/201, Electrostatic Discharge Sensitive Devices
 B.  Equipment
 (1)  Squib Protective Covers
 M83723/60-112-AN or AC
 M83723/60-110-AN or AC

 C.  Access
 (1)  
Location Zone

 (a)  703 APU Compartment

 (2)  
Access Panels

 (a)  3701 Stabilizer Trim Access Door
 D.  Prepare the Fire Extinguisher Bottle of the APU for the Removal
 S 864-002
 (1)  
Open the APU extinguisher bottle and all IND LIGHTS circuit breakers on the load control center P6.

 S 864-003

 (2)  
Open the 3701 access door.

 E.  Procedure
 S 864-036
 WARNING: DO NOT TOUCH THE SQUIB BEFORE YOU DO THE PROCEDURES FOR DEVICES
_______ THAT ARE SENSITIVE TO ELECTROSTATIC DISCHARGE. ELECTROSTATIC DISCHARGE CAN CAUSE THE FIRE BOTTLE TO RELEASE ITS CONTENTS SUDDENLY AND CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
　
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