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A
737-300/400/500MAINTENANCE MANUAL
(b) Monitor the temperature of the window with a pyrometer. Do not
exceed 200 Degrees F / 93 Degrees C.
(c) Make sure the resistance is not more than 1000 ohms.
NOTE:____ This is a check for an open sensor. Any resistance
more than 1000 ohms shows a defective sensor.
(d) Remove the plate.
S 435-037
(6)
If the primary sensor is satisfactory, connect the wires to the sensor connection.
S 765-063
(7)
If you find a defective primary sensor, do this check on the spare sensor.
NOTE: Do the check for the window with the defective primary
____ sensor.
(a)
Measure the resistance across the spare sensor.
1) Make sure there is 310 +/- 20 ohms between the spare sensor terminals.
(b)
Connect the wires to the spare sensor connection if the sensor is satisfactory.
S 905-017
(8)
If you find defective primary and spare sensors at a window, replace the window (AMM 56-11-11/401 Window No. 1, AMM 56-12-11/401 Window No. 2).
S 415-035
(9)
Install the lightshield (AMM 25-11-11/201).
S 865-064
(10)
Close these circuit breakers and remove the DO-NOT-CLOSE tags:
(a)
On the P18 panel (below the words WINDOW HEAT CONTROL), 1) RIGHT FRONT-AC 2) LEFT FRONT-AC 3) RIGHT SIDE-AC 4) LEFT SIDE-AC
(b)
On the P6 panel, 1) R FRONT WINDOW ANTI-ICE 2) L FRONT WINDOW ANTI-ICE 3) R SIDE WINDOW ANTI-ICE 4) L SIDE WINDOW ANTI-ICE
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737-300/400/500MAINTENANCE MANUAL
WINDOW NO. 5 THERMAL SWITCH - REMOVAL/INSTALLATION
__________________________________________________
1. General
_______
A. This procedure contains two tasks:
(1)
The removal of a thermal switch from a window
(2)
The installation of a thermal switch on a window.
B. A thermal switch is near the bottom of the No. 5 windows. The windows have arrows and the words LOCATE SWITCH to show where to install the switch. A spring holds the thermal switch against the window (Fig. 401).
TASK 30-41-31-004-001
2. Thermal Switch Removal (Fig. 401)
______________________
A. Access
(1) Location Zone
101/102 Control Cabin
B. Procedure
S 864-003
(1) Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
WINDOW ANTI-ICE R4 R5
(b)
WINDOW ANTI-ICE L4 L5
S 034-006
(2) Remove the switch.
(a)
Disconnect the wires from the switch.
(b)
Pull the spring away from the switch.
(c)
Remove the switch from the window.
TASK 30-41-31-404-007
3. Thermal Switch Installation
___________________________
A. Special Tools and Equipment
(1)
Pyrometer - Alnor portable pyrometer, Type 4000A with thermocouple 4040 and thermocouple arm 4010 or model 687 DIGICON INDICATOR System (to measure the temperature of the window)
(2)
Infrared Measurement Instrument - WAHL IRT-50E (Preferred to the pyrometer to measure the temperature of the window)
B. Consumable Materials
(1) G02175, Tape - Teflon Adhesive
NOTE: A commercially available teflon tape
____ with a non-stick finish can be used.
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A 737-300/400/500MAINTENANCE MANUAL
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