26-23-00
 ALL  ú ú 00 Page 107 ú Jan 20/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
AFT CARGO FIRE INDICATED. EICAS MSG "AFT CARGO FIRE" DISPLAYED. FIRE INDICATION(S) REMAINED WHEN BOTTLE 1 DISCHARGED. BOTTLE 2 WAS DISCHARGED.
A
757 FAULT ISOLATION/MAINT MANUAL
PREREQUISITES MAKE SURE THIS SYSTEM WILL OPERATE: EICAS (AMM 31-41-00/501)
MAKE SURE THESE CIRCUIT BREAKERS ARE CLOSED: 6H5, 6H6
MAKE SURE THE AIRPLANE IS IN THIS CONFIGURATION: ELECTRICAL POWER IS ON (AMM 24-22-00/201)

BOTTLE NO. 2, M10467 (AMM 26-23-02/401). REPLACE FIRE BOTTLE NO. 1, M10466 (AMM 26-23-02/401).
Aft Cargo Fire Indicated. EICAS Msg AFT CARGO FIRE Displayed.
Fire Indication(s) Remained When Bottle 1 Discharged. Bottle 2 Was Discharged.
Figure 106 (Sheet 1)

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 26-23-00
 ú ú 03 Page 108 ú Jan 20/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 FAULT ISOLATION/MAINT MANUAL
AFT CARGO FIRE INDICATED. EICAS MSG "AFT CARGO FIRE" DISPLAYED. FIRE INDICATION(S) REMAINED WHEN BOTTLE 1 DISCHARGED. BOTTLE 2 WAS DISCHARGED.
PREREQUISITES
MAKE SURE THIS SYSTEM WILL OPERATE:
EICAS (AMM 31-41-00/501)

MAKE SURE THESE CIRCUIT BREAKERS ARE CLOSED: 6H5,6H6
MAKE SURE THE AIRPLANE IS IN THIS CONFIGURATION: ELECTRICAL POWER IS ON (AMM 24-22-00/201)

YES

1 DO A CHECK OF THE AFT
21 REPLACE THE AFLOTS CARD,
CARGO COMPARTMENT FOR SIGNS OF A FIRE AND REPAIR AS NECESSARY.
ARE ALL THESE EICAS MESSAGES SHOWN?
AFT CARGO FIRECARGO BTL 1 CARGO BTL 2 M10427 (AMM 26-10-01/401).
RESET THE DISCHARGE LINE PRESSURE SWITCH, S10565 (WDM 26-23-11).
 REPLACE FIRE BOTTLES NO. 1, M10466 AND NO. 2, M10467 (AMM 26-23-02/401).
NO NO

YES12 AT THE SQUIB TEST CONTROL PANEL (P61), DO A TEST OF THE CARGO BOTTLE 1 AFT SQUIB.
YES DO ALL THE CARGO SQUIB

LIGHTS ON THE SQUIB TEST PANEL
COME ON?
NO

23 REPLACE THE AFT SQUIB ON
BOTTLE NO. 1, M10466
(AMM 26-23-02/401).

 REPLACE FIRE BOTTLE NO. 2, M10467 (AMM 26-23-02/401).
YES
13 AT THE SQUIB TEST CONTROL
PANEL (P61), DO A TEST CARGO
BOTTLE 2 AFT SQUIB.
DO ALL THE CARGO SQUIB LIGHTS ON THE SQUIB TEST PANEL COME ON?

REPLACE THE AFT SQUIB ON BOTTLE NO. 2, M10467 (AMM 26-23-02/401).
 RESET THE DISCHARGE LINE PRESSURE SWITCH, S10565 (WDM 26-23-11).
REPLACE FIRE BOTTLE NO. 1, M10466 (AMM 26-23-02/401).
Aft Cargo Fire Indicated. EICAS Msg AFT CARGO FIRE Displayed.
Fire Indication(s) Remained When Bottle 1 Discharged. Bottle 2 Was Discharged.
Figure 106 (Sheet 2)

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. GUN 051 ú

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 ú ú 05 Page 109 ú Jan 20/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757 MAINTENANCE MANUAL
 CARGO FIRE EXTINGUISHING SYSTEM - ADJUSTMENT TEST
_________________________________________________
 1.  General_______
 A.  The cargo fire extinguishing system has two fire bottles in the front part of the aft cargo compartment, a cargo fire control panel, and a squib test control panel. The bottle plumbing is connected to the forward and aft cargo compartments, which lets the compartment receive extinguishing agent from the two bottles. Each cargo compartment has an independently operated fire extinguishing system.
 B.  This section contains procedures to perform the tests that follow:
 (1)  
The operational tests make sure the system operates correctly. They can be done in a minimum of time and use only the equipment installed in the airplane.

 (2)  
The system test has different tests for each part of the system. When all the tests are done, the cargo fire extinguishing system is ready to operate correctly.

 (3)  
The discharge line test makes sure the connections are correct from the fire extinguisher bottles to the discharge nozzles.

 TASK 26-23-00-715-332
 2.  Operational Test - Bottle Pressure Switch_________________________________________
 A.  References
　
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