26-23-00
 ALL  ú ú 01 Page 504 ú May 28/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757 MAINTENANCE MANUAL
 S 865-662
 (4)  AIRPLANES WITHOUT MANUAL OVERRIDE BUTTON OR HEX KEY ON THE FIRE BOTTLE; Disconnect jumper wire between pins 2 and 3 of connector D4410 and connect D4410 to bottle number 1.
 (a)  
Make sure the yellow DISCH light goes off.

 (b)  
Make sure the EICAS message, CARGO BTL 1, does not show on the top display.

 E. Do a Test of the Fire Extinguisher Bottle 2 Pressure Switch
 S 865-009
 (1)  AIRPLANES WITH MANUAL OVERRIDE BUTTON OR HEX KEY ON THE FIRE BOTTLE; On cargo fire extinguisher bottle number 2, push and hold the pressure switch manual-override button or turn and hold the ground test hex key 1/4 turn counterclockwise.
 (a)  
Make sure the yellow DISCH light in the BTL DISCH 2 switch on the APU/CARGO Fire Control Panel, P8, comes on.

 (b)  
Make sure the EICAS message, CARGO BTL 2, shows on the top display.

 S 865-665
 (2)  AIRPLANES WITHOUT MANUAL OVERRIDE BUTTON OR HEX KEY ON THE FIRE BOTTLE; Disconnect connector D4416 from bottle number 2 and connect a jumper wire between pins 2 and 3 of D4416.
 (a)  
Make sure the yellow DISCH light in the BTL DISCH 2 switch on the APU/CARGO Fire Control Panel, P8, comes on.

 (b)  
Make sure the EICAS message, CARGO BTL 2, shows on the top display.

 S 865-013
 (3)  AIRPLANES WITH MANUAL OVERRIDE BUTTON OR HEX KEY ON THE FIRE BOTTLE; Release the pressure switch manual-override button or the ground test hex key.
 (a)  
Make sure the yellow DISCH light goes off.

 (b)  
Make sure the EICAS message, CARGO BTL 2, does not show on the top display.

 S 865-661
 (4)  AIRPLANES WITHOUT MANUAL OVERRIDE BUTTON OR HEX KEY ON THE FIRE BOTTLE; Disconnect jumper wire between pins 2 and 3 of connector D4416 and connect D4416 to bottle number 2.
 (a)  Make sure the yellow DISCH light goes off.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 26-23-00
 ALL  ú ú 01 Page 505 ú May 28/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
 (b)  Make sure the EICAS message, CARGO BTL 2, does not show on the top display.
 S 865-387
 (5) Remove electrical power if it is not necessary (Ref 24-22-00).
 TASK 26-23-00-715-388
 3.  Operational Test - Squib Circuit________________________________
 A. References
 (1)  
24-22-00/201, Electrical Power - Control

 (2)  
31-41-00/501, Engine Indication and Crew Alerting System (EICAS)

 B. Access
 (1)  Location Zones
 153 Aft Cargo Compartment (Left)
 154 Aft Cargo Compartment (Right)
 211/212 Flight Compartment

 C. Prepare for Test
 S 865-389
 (1)  
Supply electrical power (Ref 24-22-00).

 S 865-390

 (2)  
Make sure that EICAS operates (Ref 31-41-00).

 S 865-391

 (3)  
Make sure these circuit breakers on the main power distribution panel, P6, are closed:

 (a)  
6H1, FIRE EXTINGUISHING ENG L BTL 1

 (b)  
6H5, FIRE EXTINGUISHING CARGO BTL 1

 (c)  
6H6, FIRE EXTINGUISHING CARGO BTL 2

 D. Do a Test of the Fire Extinguisher Bottle Squib Circuit
 S 865-018
 (1)  On the SQUIB TEST Control Panel, P61, push and hold the TEST switch.
 (a)  Make sure the green CARGO FWD and CARGO AFT (1 and 2) squib test lights on the SQUIB TEST Control Panel come on.
 S 865-021
 (2)  
Release the TEST switch.

 (a)  Make sure the green CARGO FWD and AFT (1 and 2) squib test lights go off.

 (3)
Remove electrical power if it is not necessary (Ref 24-22-00).

 S 865-028
 TASK 26-23-00-735-333
 4.  System Test___________
 A. Equipment
 (1)  Electrical Test Equipment - Bottle Squib
 Circuit, Fire Extinguisher System - A26001-165

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
　
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