A. As water is necessary for microbial growth, fuel tanks should be sumped fre-quently where the fuel supplies are known to contain water or where high
humidity and the resultant condensation within the tank is a known factor.
Successful water drainage requires that the water be given time to separate
out and reach the area of the drain. As flight schedules do not always per-mit time for the water to settle out, sumping before refueling is recom-mended to remove water accumulated from previous refueling operations. All
767 airplanes have an automatic sumping system which provides environmental
protection with the fuel tanks. This system functions whenever either boost
pump in a main tank is running, and in the auxiliary tank, left or right,
sumping will take place when the respective override pump is running. This
will pick up water at several points between pairs of lower stringers near
tank ends thus preventing the accumulation of large amounts of water at tank
end low points. This will reduce the amount of residual water and the inci-dence of microbial growth, however, manual sumping and biocide treatment may
still be required, based on operator experience.
B. The frequency of biocide treatment should be determined from operator expe-rience with regard to fuel quality from his suppliers (refer to par. 5.C.).
Airlines operating in temperate climates with proven supplies of uncontami-nated fuel can eliminate the biocide treatment if they do not have microbial
contamination.
Volume 1
20-62-00
Page 6
OCT 01/02
CORROSION PREVENTION MANUAL
STANDARD PREVENTIVE MAINTENANCE METHODS
TRANSPORTATION OF FISH
1. General
A. This information is about the transportation of fish and seafood. Operators
may elect to use the information for shipment of similar products.
B. Corrosion problems arising from the transportation of fish occur from spill-age from the containers.
2. Equipment
A. On some airplanes, you can hose-out the cargo compartments. These airplanes
would be better for the routes where fish shipment traffic is the greatest.
Spillage can be more easily washed out. But fish slime does not wash off as
easily (Ref to par. 7.C.).
NOTE: On airplanes without the hose-out option, additional care should be exer-cised when loading and stacking containers to minimize spillage. Reports
have been received where boxes were tipped on their sides with eventual
leakage of fluids and fish slime.
3. Shipping Standards
A. Air carriers servicing a common area should establish fish packaging stan-dards so that the shipping customer will be alerted of the need for properly
packaging fish for air shipment. In addition, the standards will provide
some guidance to air carrier personnel to refuse improperly packaged ship-ments.
4. Shipping Containers
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