26-23-04
EXTINGUISHING SYSTEM ú ú 01 Page 403 ú Sep 20/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
IN-LINE PRESSURE SWITCH - REMOVAL/INSTALLATION
______________________________________________
1. General_______
A. This procedure has these tasks:
(1)
A removal of the in-line pressure switch for the lower cargo fire extinguishing system.
(2)
An installation of the in-line pressure switch.
B. The removal/installation procedure is the same for each in-line pressure switch.
C. The in-line pressure switches are located in the area of the cargo fire extinguisher bottles, in the lower aft compartment, forward of the aft cargo compartment forward end liner panel.
TASK 26-23-05-004-001
2. Remove the In-Line Pressure Switch (Fig. 401)__________________________________
A. References
(1) AMM 25-50-03/401, Bulkhead Lining - Removal/Installation
B. Access
(1) Location Zones
151 Forward of Aft Cargo Compartment (Left)
152 Forward of Aft Cargo Compartment (Right)
C. Prepare for the Removal
S 864-002
(1)
Open these circuit breakers on the main power distribution panel, P6, and attach a DO-NOT-CLOSE tag:
(a)
6H5, FIRE EXTINGUISHING CARGO BTL 1
(b)
6H6, FIRE EXTINGUISHING CARGO BTL 2
(2)
Open the door to the aft cargo compartment.
S 014-003
(3)
Remove the bulkhead lining from the forward wall of the cargo compartment to get access to the pressure switch (AMM 25-50-03/401).
S 014-017
D. Removal
S 024-013
(1) Loosen the connector on the inlet tube.
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26-23-05
ALL ú ú 04 Page 401 ú Sep 20/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
CARGO FIRE EXT
BOTTLE NO. 1,
M10466
CARGO FIRE EXT
BOTTLE NO. 2,
AFT CARGO M10467
DOOR, 822
BOTTLES, M10466,M10467 EXTINGUISHING CARGO FIRE SEE A SEE B DISCHARGE LINE PRESSURE SWITCH, 1 S633 FWD
FORWARD DISCHARGE LINE SEE B PRESSURE SWITCH, S633 TO FORWARD COMPARTMENT TO AFT COMPARTMENT
BOTTLE NO. 2, M10467 CARGO FIRE EXTINGUISHER
BOTTLE NO. 1, M10466 CARGO FIRE EXTINGUISHER
HARD POINT CONNECTOR CONNECTOR HARD POINT
1
AIRPLANES PRE-SB 26-20
A2 2
AIRPLANES POST-SB 26-20
Cargo Fire Extinguisher Bottle/Discharge
Line Pressure Switch Installation
Figure 401 (Sheet 1)
G23682
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ALL EXCEPT GUN 051 ú
26-23-05
ú ú 10 Page 402 ú Jan 28/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
SEE A1
TO FORWARD (YELLOW) COMPARTMENT (BLUE) COMPARTMENT TO AFT
BSEE SWITCH, S633 FORWARD DISCHARGE LINE PRESSURE
CARGO FIRE EXTINGUISHER BOTTLE NO. 1, M10466 M10467 BOTTLE NO. 2, CARGO FIRE EXTINGUISHER
CONNECTOR HARD POINT CONNECTOR HARD POINT
FILTER/DRIER REGULATOR A1 FILTER/DRIER AFT METERED DISCHARGE LINE PRESSURE SWITCH, S10565 BSEE
Cargo Fire Extinguisher Bottle/Discharge Figure 401 (Sheet 2) Line Pressure Switch Installation
G23691
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