2...........…................…...............…..................…..............1 *[1] Do the fuel resistance check to make sure the cure is completed. *[2] Do the MEK resistance check to make sure the cure is completed. *[3] Let the finish dry a minimum of 30 minutes at the temperature you applied
it before you cure the finish at a higher temperature.
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A
757 MAINTENANCE MANUAL
(a)
To cure all finish layers, refer to Table 702.
(b)
The cure time can decrease if you increase the temperatures and, with some finish compounds, increase relative humidity (R.H.) (Fig. 702 thru 705).
(c)
Do the fuel (JP-4) or solvent (MEK) resistance check that follows to make sure the cure is complete. 1) Soak a 4-inch square pad of cheesecloth with MEK or JP-4 as
applicable. 2) Apply the pad to the surface you check and let the solvent or fuel soak the area. 3) Use hard pressure and rub the area 100 strokes.
NOTE: Count each movement in one direction as a
____
stroke.
4) Look and see if the corrosion resistant finish is removed.
NOTE: If you can see metal, the corrosion resistant finish
____
is removed.
a) If you do not see metal, the cure is satisfactory.
H. Return Airplane to Its Usual Configuration
S 957-051
(1)
Make sure all masking tape is removed from the fuel tank and tank equipment.
S 417-052
(2)
Install all substructure, support brackets, and fuel tank equipment removed for access.
S 217-053
(3)
Make sure all tools, rags, air movers, hoses, and other equipment is removed from the fuel tank.
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