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So, i am very curious to know that: this is true in general or with some restrictions? For a sphere bundle over sphere, we get an n-plane bundle which just an extension of given sphere bundle?
@ David Actually i have seen in some paper that for the bundle say A: S^ 2 -> CP^3 -> S^4 , there exists a 3-plane bundle over S^4 say B, such that A is restriction of B on unit sphere.