(2)
AIPC 38-32-00, Fig. 3
(3)
SSM 30-71-01
(4)
SWPM 20-30-12 (Standard Wiring Practices)
(5)
WDM 30-71-12
C. Access
(1) Location Zone
147, 148 Area below Bulk Cargo Compartment - Waste Tank Service Panel
D. Installation Procedure
S 424-010
CAUTION: DO NOT BEND THE HEATER MORE THAN NECESSARY TO INSTALL IT ON THE
_______ RINSE LINE. YOU CAN CAUSE DAMAGE TO THE HEATER IF YOU BEND IT TOO MUCH.
(1)
Carefully open the rinse fitting heater and install it on the rinse line.
(2)
Attach the heater with two wraps of flame-resistant adhesive tape.
S 434-011
NOTE: Do not apply tape over the electrical leads.
____
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747-400
MAINTENANCE MANUAL
S 114-021
WARNING: DO NOT GET SOLVENTS IN YOUR MOUTH, OR YOUR EYES, OR ON YOUR
_______ SKIN. DO NOT BREATHE THE FUMES FROM SOLVENTS. SOLVENTS ARE HAZARDOUS MATERIALS. SOLVENTS MAY BE FLAMMABLE OR HARMFUL TO THE ENVIRONMENT. REFER TO PRODUCT MATERIAL SAFETY DATA SHEETS (MSDS) AND LOCAL REQUIREMENTS FOR PROPER HANDLING PROCEDURES.
(3)
Clean the mating surface with solvent, Series 89 (AMM 20-30-89/201).
S 344-013
(4)
Bond the thermostat to the pan surface with adhesive.
NOTE:____Do not install the thermostat on rivet heads. Make sure that all of the the thermostat surface touches the pan surface.
S 034-022
(5)
Remove the old electrical leads from the splice.
S 434-014
(6)
Make a splice of the new electrical leads (SWPM 20-30-12).
S 434-015
(7)
Attach the leads to the rinse line with a tie-down strap.
E. Rinse Fitting Heater Test
S 864-016
(1) Close this circuit breaker:
(a) P414, Left Power Distribution Center
1) 414D005, WASTE & WATER HTRS-A1
414A024, WASTE & WATER HTRS-B1
S 864-017
(2)
Supply electrical power (AMM 24-22-00/201).
S 284-018
(3)
Touch the rinse fitting heater to make sure that it becomes warm.
(4)
Remove electrical power (AMM 24-22-00/201).
(5)
Install the floor panel in the bulk cargo compartment.
S 864-019
S 414-020
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747-400 MAINTENANCE MANUAL
WASTE TANK DRAIN HEATER BLANKET - REMOVAL/INSTALLATION
______________________________________________________
1. General_______
A. This subject has two tasks, one for the removal and one for the installation of the blanket heaters at the waste tank drain tubes. In this procedure, you will get access to the heater, remove the heater, install a replacement unit, and do a check of heater operation.
TASK 30-71-04-004-011
2. Waste Tank Drain Blanket Heater Removal (Fig. 401)_______________________________________
A. References
(1)
SSM 30-71-04
(2)
SWPM 20-30-12
(3)
WDM 30-71-16
B. Access
(1) Location Zone
147, 148 Area below Bulk Cargo Compartment -Waste Tank Service Panel
C. Procedure
S 864-001
(1) Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a) P84, Aft Center Miscellaneous Circuit Breaker Panel 1) LEFT WASTE TANK HEATERS 2) RIGHT WASTE TANK HEATERS
S 014-002
(2)
Remove the bulk cargo compartment floor panels to get access to the applicable blanket heater.
S 034-003
(3) 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：747-400 AMM 飞机维护手册 防冰和排雨 ICE AND RAIN PROTECTION(89)
