(f)  
Ensure the DISCH light (Amber) on the cargo fire control panel (P8) goes off.

(13)
Connect and perform a test of FWD squib to fire extinguishing bottle.

(a)  
Open this circuit breaker and attach a DO-NOT-CLOSE tag:

1)  Circuit Breaker Panel P6 or P18:
a) CARGO FIRE EXT 1

(b)  
Perform these steps to connect electrical connector, D12794, to FWD squib of bottle. 1) Remove protective cover from FWD squib.

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WARNING:  ENSURE THERE IS NO VOLTAGE AT ELECTRICAL CONNECTOR. IF THERE IS A VOLTAGE AT ELECTRICAL CONNECTOR, SQUIB CAN RELEASE ITS CONTENTS SUDDENLY AND CAUSE INJURY TO PERSONS.
2)  Ensure there is no voltage between pins 1 and 2 of electrical connector, D12794.
NOTE:  Connect a 10K ohm resistor across meter leads to remove all stray voltage from electrical connector.
3) Ensure squib pins are not bent or damaged.
4) Ensure electrical connector is not damaged.

NOTE:  The squib pins can cause damage to the connector if the pins do not enter electrical connector receptacle correctly.
5)  Connect electrical connector, D12794, to FWD squib of fire bottle.
(c)  
Remove the DO-NOT-CLOSE tag and close this circuit breaker:

1)  Circuit Breaker Panel P6 or P18:
a) CARGO FIRE EXT 1

(d)  
On the cargo fire control panel (P8), push and hold TEST switch. 1) Ensure FWD EXT light (Green) on cargo fire control panel (P8) illuminates. 2) Ensure AFT EXT light (Green) stays off.

(e)  
Release TEST switch.
1) Ensure FWD EXT light (Green) goes off.

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(14) Connect and perform a test of the AFT squib to the fire extinguishing bottle.
(a)  
Open this circuit breaker and attach a DO-NOT-CLOSE tag:

1)  Circuit Breaker Panel P6 or P18:
a) CARGO FIRE EXT 1

(b)  
Perform these steps to connect electrical connector D12796, to AFT squib of bottle. 1) Remove protective cover from AFT squib.

WARNING:  ENSURE THERE IS NO VOLTAGE AT ELECTRICAL CONNECTOR. IF THERE IS A VOLTAGE AT ELECTRICAL CONNECTOR, THE SQUIB CAN RELEASE ITS CONTENTS SUDDENLY AND CAUSE INJURY TO PERSONS.
2)  Ensure there is no voltage between pins 1 and 2 of electrical connector, D12796.
NOTE:  Connect a 10K ohm resistor across meter leads to remove all stray voltage from electrical connector.
3) Ensure squib pins are not bent or damaged.
4) Ensure electrical connector is not damaged.

NOTE:  The squib pins can cause damage to the connector if the pins do not enter the electrical connector receptacle correctly.
5) Connect electrical connector D12796, to AFT squib of fire bottle.
(a)  
Remove the DO-NOT-CLOSE tag and close this circuit breaker:

1)  Circuit Breaker Panel P6 or P18:
a) CARGO FIRE EXT 1

(d)  
On the cargo fire control panel (P8), push and hold TEST switch.

1)  Ensure FWD and AFT EXT lights (Green) on the cargo fire control panel (P8) illuminate.

(e)  
Release TEST switch.
1) Ensure FWD and AFT EXT lights (Green) go off.

G.  Return the Airplane to Its Usual Condition
(1)  
If removed, install air conditioning duct in front of fire extinguishing bottle
(AMM 25-52-131/401).

(2)  
Install lining at aft end of forward cargo compartment (AMM 25-52-131/401).

(3)  
Close 4404R, Forward Cargo Door.

(4)  
Remove electrical power if not needed (AMM 24-22-0/201).

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CARGO COMPARTMENT FIRE EXTINGUISHER BOTTLE SQUIB - REMOVAL/INSTALLATION
EFFECTIVITY
737-200 Passenger Airplanes Incorporating SB 26A1081
1.  General
A.  This procedure has tasks to remove and install the cargo fire bottle squibs.
B.  The cargo fire bottle is installed in the mix manifold bay, in the aft end of the lower fwd cargo compartment. The cargo fire bottle has two discharge cartridges (squibs).
2.  Remove the Cargo Fire Extinguisher Bottle Squib (Fig. 401)
A.  Equipment
(1)  
Squib Protective Cover

(a)  
M83723/60-28-AN or AC (Fwd Squib)

(b)  
M83723/60-210-AN or AC (Aft Squib)
　
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