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Cargo Fire Control Panel Installation

 (a)  If the installation test for the CARGO FIRE panel is
 satisfactory, then you corrected the fault.

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 ALL  ú ú 02 Page 207 ú Jul 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 CARGO COMPARTMENT FIRE EXTINGUISHING - ADJUSTMENT/TEST
______________________________________________________
 1.  General_______
 A. This procedure has these tasks:
 (1)  
An operational test

 (2)  
A test of the squib circuit

 (3)  
A test of the pressure switch circuit

 (4)  
An airflow test through the discharge tubes

 (5)  
A pressure test of the discharge tubes

 TASK 26-23-00-715-111
 2. Operational Test
 A. Do the operational test.
 S 715-113
 (1)  Push and hold the TEST switch on the Cargo Fire Control panel.
 (a) Make sure the FWD EXT and AFT EXT lights come on.
 NOTE:____Other indications can occur during this test. The other indications are not important for this test.
 S 715-112
 (2)  Release the TEST switch.
 TASK 26-23-00-705-001
 3.  Squib Circuit Test (Fig. 501)__________________
 A. References
 (1)  AMM 24-22-00/201, Manual Control
 B. Equipment
 (1)  
Test box - Cargo Fire Extinguishing System, PN C26006-1

 (2)  
Multimeter

 C. Access
 (1)  
Location Zones
 208 Forward Cargo Compartment
 101 Control Cabin - Left
 102 Control Cabin - Right

 (2)  
Access Panels
 4404R, Forward Cargo Compartment

 D. Prepare for the Test
 S 865-002
 (1)  
Supply Electrical Power (AMM 24-22-00/201)

 S 865-003

 (2)
Open this circuit breaker and install a DO-NOT-CLOSE tag:

 (a)  Circuit Breaker Panel, P6 or P18 1) LWR CARGO FIRE EXT 1
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 FIRE EXTINGUISHING SYSTEM  ú ú 01 Page 501 ú Jul 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 S 015-004
 (3)  
Open the forward cargo door, 4404R.

 S 015-005

 (4)  
Remove the lining at the aft end of the forward cargo compartment to get access to the fire extinguishing bottle.

 E. Squib Circuit Test
 S 035-006
 (1)  Disconnect the electrical connector from the squibs.
 (a)  
Disconnect D12794 from the FWD squib, M2249.

 (b)  
Disconnect D12796 from the AFT squib, M2250.

 S 435-007
 WARNING:_______PUT A PROTECTIVE COVER ON THE SQUIB. IF YOU DO NOT PUT A PROTECTIVE COVER ON THE SQUIB, THE FIRE EXTINGUISHING BOTTLE CAN RELEASE ITS CONTENTS SUDDENLY AND CAUSE INJURY TO PERSONS.
 (2)  
Install a protective cover on each squib.

 S 485-084

 (3)  
Connect the squib connectors to the applicable connectors on the Cargo Fire Extinguishing System Test Box, PN C26006-1.

 S 735-085

 (4)  
Set all the switches on the Test Box to NO DISCHARGE.

 S 735-086

 (5)
Make sure all the circuit breakers on the Test Box are closed.

 S 865-008

 (6)  
Remove the DO-NOT-CLOSE tag and close this circuit breaker:

 (a)  Circuit Breaker Panel, P6 or P18
 1) LWR CARGO FIRE EXT 1

 S 735-088
 (7)  
Make sure none of the circuit breakers on the test box open.

 S 735-009

 (8)  
Do a test of the forward cargo fire bottle squib circuit.

 (a)  
Set the EXT 1 FWD switch S3 on the Test Box to DISCHARGE.
　
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