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" ... Every week the plane should be scanned for corrosion; every two weeks, electrical systems powered up for two hours. Every 30 days the plane should be moved a third of a wheel’s turn, to prevent the tires from getting flat spots; carpets and seats checked for mildew; and water drained from the sumps of fuel tanks to prevent growth of bacteria or fungi, which can have the consistency of mayonnaise and plug fuel filters. ... "