S 644-018
(2)
Apply some antiseize compound to the threads on the switch.
S 424-009
(3)
Install the overheat switch on the mounting boss on the pneumatic duct.
S 424-020
(4)
Re-connect the electrical connector.
S 864-010
(5)
Supply electrical power (AMM 24-22-00/201).
S 864-011
(6)
Remove the DO-NOT-CLOSE tag and close the OVERHEAT circuit breaker on the P6 Load Control Panel.
S 864-012
(7)
Push the BLEED TRIP OFF annunciator light on the P5-10 panel.
(a)
Make sure the light comes on when you push the light.
(b)
Make sure the light goes off when you release the light.
S 864-016
(8) Push the TRIP RESET button on the P5-10 panel.
(a) Make sure the MASTER CAUTION light goes off.
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737-300/400/500MAINTENANCE MANUAL
E. Put the Airplane to Its Usual Condition
S 414-014
(1)
Close the access panel.
S 864-015
(2)
Remove the electrical power if it is not necessary (AMM 24-22-00/201).
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737-300/400/500MAINTENANCE MANUAL
HIGH STAGE VALVE - REMOVAL/INSTALLATION
_______________________________________
1. General_______
A. This procedure contains two tasks. The first task removes the high stage valve. The second task installs the high stage valve.
B. The high stage valve is a butterfly valve. It is pneumatically
controlled by the high stage regulator.
C. A high stage valve is found on the right side (3 o'clock position) of each engine core. It is below the pressure regulating and shutoff valve.
TASK 36-11-85-004-001
2. High Stage Valve Removal________________________
A. References
(1)
AMM 36-05-00/201, Pneumatic System
(2)
AMM 71-11-02/201, Fan Cowl Panels
(3)
AMM 78-31-00/201, Thrust Reverser System
B. Access
(1)
Location Zones
101/201 Control Cabin
502/503 Fan Cowls - Left Nacelle
504/505 Thrust Reversers - Left Nacelle
506/606 Engines
602/603 Fan Cowls - Right Nacelle
604/605 Thrust Reversers - Right Nacelle
(2)
Access Panels
5737/5837 Fan Cowl Assy
5738/5838 Thrust Reverser Cowl Assy
5739/5839 Thrust Reverser Cowl Assy
5746/5846 Fan Cowl Assy
C. Prepare to Remove the High Stage Valve
S 864-002
(1) Put the forward thrust lever in the fully rearward position and attach a DO-NOT-OPERATE tag.
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737-300/400/500MAINTENANCE MANUAL
S 864-003
(2) Put the start lever in the CUTOFF position and attach a
DO-NOT-OPERATE tag.
S 864-004
WARNING: YOU MUST REMOVE THE PRESSURE FROM THE PNEUMATIC SYSTEM BEFORE
_______ YOU REMOVE COMPONENTS FROM THE PENEUMATIC SYSTEM. THE HIGH PRESSURE AIR CAN CAUSE INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT.
(3)
Remove the pressure from the pneumatic system (Ref 36-05-00/201).
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