757
MAINTENANCE MANUAL

 (g) (h)  Make sure the airplane's structural drains in the bilge are open to let the water drain.Use (Fig. 301) to find the time needed to melt the ice.
 NOTE:____ You can use a conditioned ground cart to heat the inside of the airplane. This will shorten the time needed to melt the ice.
 (i)  After the water drains, put the airplane back to its usual condition.
 (j) (k)  Remove all wet insulation blankets.Make sure all insulation blankets are dry before they are installed.
 (l)  After the water drains, put the airplane back to its usual condition.

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A
757 MAINTENANCE MANUAL
200

DURATION OF TIME (HOURS)

180
160
140
120
100
80
60
40
20
0
40  50  60  70  80  90  100  110  `F 
5  10  15  20  25  30  35  40  `C 
AIR TEMPERATURE OUTSIDE AIRPLANE Time Required to Melt Interior Ice Figure 301 

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