SUBTASK 30-71-03-420-003
(4) Connect the electrical connectors [5].
SUBTASK 30-71-03-020-004
(5) If necessary, replace the clamp [2] which secures the electrical wiring.
(a) Install the clamp [2], screw [3], washer [4] and nut [7].
G. Waste Drain Line Heater Installation Test
SUBTASK 30-71-03-720-001
(1) Measure the temperature of the heater blanket [1].
SUBTASK 30-71-03-860-003
(2) Remove the safety tag and close this circuit breaker:
CAPT Electrical System Panel, P18-3
Row Col Number Name
E 5 C00233 HEATERS DRAIN
SUBTASK 30-71-03-860-006
(3) Put the CAB/UTL switch on the P5-13 panel to the ON position.
SUBTASK 30-71-03-720-002
(4) If the temperature in the area is lower than 45°F (7°C):
(a) Make sure the temperature of the heater blanket [1] is 5 degrees F (3 degrees C) higher
than the first temperature you measured.
SUBTASK 30-71-03-720-003
(5) If the temperature in the area is higher than 45°F (7°C):
(a) Feel the heater blanket [1] to find the thermostat [6].
NOTE: The thermostat is approximately 1 inch in diameter and is below the skin of the
heater blanket.
(b) Decrease the temperature of the thermostat to below 45 degrees (7 degrees C).
NOTE: You can use MS-242N spray, G02319, ice, G02320, or compound, G01012, to
decrease the temperature. Permit 3 to 5 minutes for the temperature of the
thermostat to decrease before you check the temperature of the heater blanket.
(c) Make sure the heater blanket [1] gets warm.
H. Put the Airplane Back to Its Usual Condition
SUBTASK 30-71-03-410-001
WARNING
SEAL THE CARGO COMPARTMENT WITH THE LINING. OBEY THE
INSTRUCTIONS IN THE SPECIFIED PROCEDURE WHEN YOU INSTALL THE
LINING. IF YOU INSTALL THE LINING INCORRECTLY, THE SMOKE CAN GO
INTO THE PASSENGER COMPARTMENT DURING A FIRE. THIS CAN CAUSE
INJURY TO PERSONNEL.
(1) Do this task: Waste Tank Enclosure Panel - Installation, TASK 25-52-20-400-801.
SUBTASK 30-71-03-410-002
(2) Close this access door:
Number Name/Location
822 Aft Cargo Door
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
30-71-03
Page 405
D633A101-ILF Jun 15/2019
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
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