risk-as-first-user-of-a-technologyBe especially careful when one is the firstto use a technology or application.Why have no uses of aramid containments been reported in fighter aircraftengines, although they are frequently used in commercial aircraft?Aramid containments require a great deal of spacefor radial expansion. This is not available in afighter aircraf fuselage. Engine inthe fuselageEngine ina nacelleSpace for expansion of thecontainment