S 434-010

 (2)  
Install the washers and coupling nut on the differential pressure sensor. Tighten against the tee connector.

 S 434-011

 (3)  
Install the electrical connector on the differential pressure sensor.

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MAINTENANCE MANUAL

 (4)  S 864-012Remove the DO-NOT-CLOSE tags and close these circuit breakers on the P11 panel: (a) 11B12, CABIN DIFF PRESS IND (b) 11B13, CABIN ALTM
 (5)  S 864-013Supply electrical power (Ref 24-22-00)
 (6)  S 214-014Make sure the differential pressure indicator moved from OFF to approximately 0.
 NOTE:____ The differential pressure indicator is on the pressurization indication and warning module on the P5 panel.
 (7)  S 414-015Close the forward equipment bay access door (119BL).
 (8)  S 864-016Remove electrical power, if it is not necessary.

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3.

757 MAINTENANCE MANUAL
 CABIN ALTITUDE WARNING SWITCH - REMOVAL/INSTALLATION
____________________________________________________General
_______
 A.  This procedure contains two tasks. The first task is the removal of the cabin altitude warning switch. The second task is the installation of the cabin altitude warning switch.
 B.  Some airplanes have an additional high cabin altitude warning switch installed. The procedure for the removal and installation of the high cabin altitude warning switch is the same as the procedure for the removal and installation of the cabin altitude warning switch.
 TASK 21-33-05-004-018
Cabin Altitude Warning Switch Removal (Fig. 401)

_____________________________________

 A.  References
 (1)  
AMM 06-41-00/201, Fuselage Access Doors and Panels

 B.  
Access

 (1)  
Location Zones
 119 Main Equipment Center, Left
 120 Main Equipment Center, Right

 C.  
Procedure

 S 864-019
 (1)  
Open the E/E bay access door 119AL (AMM 06-41-00).

 S 024-020

 (2)  
Find the cabin altitude warning switch on the left miscellaneous electrical equipment panel, P36.

 S 024-021

 (3)  
Disconnect the electrical connector.

 S 024-022

 (4)  
Remove the bolts, washers, and nuts which attach the switch to the panel.

 S 024-023

 (5)  
Remove the switch and it's support bracket.

 TASK 21-33-05-404-024
Cabin Altitude Warning Switch Installation (Fig. 401).

__________________________________________

 A.  References
 (1)  
AMM 06-41-00/201, Fuselage Access Doors and Panels

 B.  
Access

 (1)  
Location Zones
 119 Main Equipment Center, Left
 120 Main Equipment Center, Right

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MAINTENANCE MANUAL

SECTION C SEE

LEFT MISCELLANEOUS ELECTRICAL EQUIPMENT PANEL, P36

Cabin Altitude Warning Switch - Removal/Installation
Figure 401 (Sheet 1)

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