A
757
MAINTENANCE MANUAL
S 417-040
(18)
Install the drain valve of the fuel sump (AMM 28-11-05/401).
S 097-041
(19)
Remove all purging and ventilating equipment from the fuel tank.
S 417-042
(20)
Install the applicable main, center or surge tank access doors (AMM 28-11-01/401, AMM 28-11-02/401, AMM 28-11-03/401).
S 657-043
(21)
Refuel the fuel tank (AMM 12-11-01/301).
S 217-044
(22)
Make sure there are no fuel leaks.
TASK 28-11-00-607-055
4. Apply the Corrosion Resistant Finish (Topcoat)______________________________________________
A. General
(1)
Corrosion resistant finish (topcoat) is applied to prevent corrosion to the internal structural and tubing surfaces, especially the bottom and lower sides, of the fuel tank. BMS 10-20 Type II and MIL-C-27725 are two kinds of corrosion resistant material which are approved for internal fuel tank use. An advantage of BMS 10-20 Type II finish material is that you can make additional BMS 5-26 sealant repairs, if necessary, after you apply the finish material if it is fully heat cured per Fig. 704 before sealant is applied. The MIL-C-27725 material can only be used as a topcoat after sealant installation is complete.
B.
Equipment
WARNING: MAKE SURE THE CAPACITY OF THE EXHAUST FAN
_______
IS MORE THAN THE CAPACITY OF THE AIR
BLOWER. THIS WILL MAKE SURE THERE IS A
GOOD FLOW OF AIR. THE CORROSION RESISTANT
FINISH IS A POISONOUS AND FLAMMABLE
COMPOUND WHICH CAN CAUSE INJURY TO PERSONS
OR DAMAGE TO EQUIPMENT.
(1) Explosionproof air blower, with sufficient
flexible hose to reach all areas in the fuel
tanks. The capacity must be 90-100 cubic feet
per minute (Rhine Air, Inc., 10744 Prospect
Avenue, Suite A, Santee, CA 92071)
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28-11-00
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A
757
MAINTENANCE MANUAL
(2)
Explosionproof centrifugal exhaust fan with 125-150 cubic feet per minute capacity and approximately 75 feet of 3-inch diameter flexible suction hose plus sufficient delivery hose to carry exhausted air outside hangar or work area (Rhine Air, Inc., 10744 Prospect Avenue, Suite A, Santee, CA 92071).
(3)
Full face supplied air type respirator,
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