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 3.  Inspection/Check - Discharge Cartridge (Squib) Service Life____________________________________________________________
 A.  Procedure
 S 756-008
 (1)  Make a check of the manufacturer's date mark on the edge of the squib to find the unexpired service-life of the squib. See the manufacturer's data for the recommended maximum life.
 NOTE:  If the cartridge (squib) has been in high temperatures or unusual conditions, the service life can be different than the indicated value. Contact HTL Advanced Technology, Monrovia, California 91016 for further information.
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737-300/400/500MAINTENANCE MANUAL
 S 306-014
 (2)  Replace the squib if the service life of the squib is more than recommended by the manufacturer.
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737-300/400/500MAINTENANCE MANUAL
 APU FIRE EXTINGUISHER BOTTLE SQUIB - MAINTENANCE PRACTICES
__________________________________________________________
 1.  General_______
 A. This procedure contains three tasks:
 (1)  
Remove the Squib.

 (2)  
Check the Squib.

 (3)  
Install the Squib.

 B. The squib is checked more frequently than the bottle.
 C. A manufacturer's date is on the edge of the squib.
 NOTE: See the manufacturer's data for the maximum service life.
____
 D. Reference
 (1) AMM 20-40-12/201, Electrostatic Discharge Sensitive Devices
 E. Equipment
 (1)  
Squib Protective Cover
 M83723/60-210-AN or AC
 M83723/60-112-AN or AC
 M83723/60-108-AN or AC
 M83723/60-110-AN or AC

 (2)  
Resistor - 10K ohms or greater

 (3)  
Voltmeter -28 vdc

 TASK 26-22-21-002-001
 2.  Remove the Squib________________
 A. Do these steps to remove the squib.
 S 862-028
 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.
 (1)  
Before you touch the squib, do the procedure for devices that are sensitive to electrostatic discharge (AMM 20-40-12/201).

 S 862-017

 (2)  
Open these circuit breakers and attach DO-NOT-CLOSE tags:

 (a)  P6 Load Control Center Panel
 1) EXT BOTTLE APU
 2) IND LIGHTS (all)

 (3)  
Open the access door, 3701.

 (4)  
Remove the electrical connector from the squib.

 S 012-018
 S 032-004
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737-300/400/500MAINTENANCE MANUAL
 S 422-025
 WARNING:_______PUT A PROTECTIVE COVER ON THE FIRE BOTTLE SQUIB. IF YOU DO NOT PUT A PROTECTIVE COVER ON THE FIRE BOTTLE SQUIB, THE FIRE BOTTLE CAN RELEASE ITS CONTENTS SUDDENLY AND CAUSE INJURY TO PERSONS.
 CAUTION:_______DO NOT PUT A SHUNT PLUG ON THE FIRE BOTTLE SQUIB. THE SHUNT PLUG CAN CAUSE DAMAGE TO THE SQUIB PINS.
 (5)  
Put a protective cover on the fire bottle squib.

 S 022-006

 (6)  
Remove the lockwire and remove the squib from the bottle.

 S 432-007

 (7)
Seal the end of the squib and the bottle fitting with a cap.

　
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