(2)
Blunt-ended metal rod, approximately 1/16 inch diameter, 2-5 inches long.
(3)
Filter Material - Scott Filter Foam, 3/16 inch thickness, porosity grade 45 PPI, color - grey, flame retardant, Scott Paper Co. (Foam Div), 1500 E. 2nd St., Chester, PA
B. Consumable Materials
(1) Detergents
NOTE: Use one of these detergents (Ref 20-30-31/201):
____
(a)
B00029 - Brulin Formula 815 MX - diluted 8 to 1 with water
(b)
B00043 - NRG plus No. 678 - diluted as required with water
(2)
B00130 - Isopropyl Alchohol TT-I-735
(3)
G00034 - Clean and dry cheesecloth or cotton cloths and lint-free tissue
C. References
(1)
21-61-31/401, Passenger Cabin Temperature Sensor
(2)
21-61-34/401, Passenger Cabin Temperature Sensor Fan
(3)
21-61-61/401, Control Cabin Temperature Sensor
(4)
21-61-64/401, Control Cabin Temperature Sensor Fan
(5)
21-62-25/401, Passenger Cabin Temperature Bulb
(6)
21-61-00/501, Temperature Control System - Adjustment Test
D. Access
(1) Location Zones
101 Control Cabin - Right
107 Forward Half of Cabin
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737-300/400/500MAINTENANCE MANUAL
E. Prepare for the Cleaning
S 027-042
(1) At the air inlet to the passenger cabin temperature sensor, do these steps to remove the grille and filter:
(a)
Put the metal rod into the hole at the edge of the grille until the spring catch releases.
(b)
Remove the grille and the filter.
S 037-005
(2) On the control cabin temperature sensor, do these steps:
(a)
Remove the fasteners from the grille.
(b)
Remove the grille and the filter.
S 037-006
(3)
Remove the temperature sensor and/or the temperature bulb
(Ref 21-61-31/401 and/or 21-62-25/401).
S 037-007
(4)
Remove the passenger cabin temperature sensor fan
(Ref 21-61-34/401).
S 037-008
(5)
Remove the control cabin temperature sensor (Ref 21-61-61/401).
S 037-009
(6)
Remove the control cabin temperature sensor fan (Ref 21-61-64/401).
F. Clean the Components
S 117-031
(1) Do these steps to clean the temperature bulb, the temperature sensor, and the temperature sensor probes:
(a)
Clean the components with a cloth that is moist with the detergent solution.
(b)
Clean the components with the isopropyl alcohol if the contamination continues to occur on the components.
NOTE: Clean the components again with the detergent solution
____ after you use the isopropyl alcohol.
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737-300/400/500MAINTENANCE MANUAL
(c) Flush the components with a cloth that is moist with clean water.
S 117-032
(2) Do these steps to clean the fans:
CAUTION: DO NOT PUT THE SENSOR ASSEMBLY OR THE MOTOR FULLY IN THE
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