(2)
Altitude Pressure Switch Installation
TASK 35-22-41-004-001
2. Altitude Pressure Switch Removal (Fig. 401)
________________________________
A. References
(1)
AMM 20-10-07/201, E/E Rack-Mounted Components
(2)
AMM 24-22-00/201, Manual Control
(3)
AMM 52-48-41/401, Electronic Equipment Compartment External Access Door
B. Access
(1) Location Zone
100 Lower Half of Fuselage
C. Prepare for Switch Removal
S 864-033
(1)
Remove electrical power from the airplane (AMM 24-22-00/201).
S 014-024
(2)
Open the main equipment bay access door (AMM 52-48-41/401).
S 014-032
(3)
Get access to the E3-1 shelf installed at the right hand side of the electronic rack installation.
(4)
Roll back the nylon moisture shroud installed above the E3 rack.
S 014-004
NOTE: The altitude pressure switch, S813 is installed on the relay
____ support bracket, located behind the transformer rectifier no. 2 (TR2).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
S 024-034
CAUTION: OBEY ELECTROSTATIC SAFETY PROCEDURES YOU DO WORK NEAR POWER
_______ SUPPLY EQUIPMENT TO PREVENT ELECTRICAL SHOCK TO PERSONNEL.
(5) Remove transformer rectifier no. 1 and 2 (TR1 and TR2) from the E3-1 rack, to get access to the switch (AMM 20-10-07/201).
NOTE: Removal of adjacent equipment may be necessary, if access
____
is limited.
S 024-023
(6) Remove the altitude pressure switch, S813 as follows:
(a)
Disconnect the electrical connector from the switch.
(b)
Disconnect the air hose (if installed) from the switch.
NOTE: Do not let unwanted material or debris get into the
____
air hose.
(c)
Remove the screws, washers and nuts which hold the switch to the relay support bracket. 1) Keep the screws, washers and nuts for installation.
(d)
Remove the altitude pressure switch, S813.
TASK 35-22-41-404-014
3. Altitude Pressure Switch Installation (Fig. 401)
_____________________________________
A. References
(1)
AMM 20-10-07/201, E/E Rack-Mounted Components
(2)
AMM 24-22-00/201, Manual Control
(3)
AMM 35-22-00/501, Oxygen System
(4)
AMM 52-48-41/401, Electronic Equipment Compartment External Access Door
B. Access
(1) Location Zone
100 Lower Half of Fuselage
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
NYLON MOISTURE SHROUD
BULKHEAD PANEL
ELECTRONICS
SHELF, E3-1
TRANSFORMER
RECTIFIER NO. 1
SEE A
RACK (REF)
TRANSFORMER RECTIFIER NO. 2
ALTITUDE PRESSURE
RACK (REF) SWITCH, S813 ELECTRICAL
A
CONNECTOR
A
RELAY SUPPORT BRACKET (REF)
FWD
ELECTRONICS SHELF, E3-1 (EXAMPLE)
A
Altitude Pressure Switch Installation
Figure 401 (Sheet 1)
L61683
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
(REF)PRESSURE SWITCH, S813
FWD
A-A
IF INSTALLED
Altitude Pressure Switch Installation Figure 401 (Sheet 2)
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