  We examine the first non-vanishing higher homotopy group, $\pi_p$, of the
complement of a hypersolvable, non--supersolvable, complex hyperplane
arrangement, as a module over the group ring of the fundamental group,
$\Z\pi_1$. We give a presentation for the $I$--adic completion of $\pi_p$. We
deduce that the second nilpotent $I$--adic quotient of $\pi_p$ is determined by
the combinatorics of the arrangement, and we give a combinatorial formula for
the second associated graded piece, $\gr^1_I \pi_p$. We relate the torsion of
this graded piece to the dimensions of the minimal generating systems of the
Orlik--Solomon ideal of the arrangement $\A$ in degree $p+2$, for various field
coefficients. When $\A$ is associated to a finite simple graph, we show that
$\gr^1_I \pi_p$ is torsion--free, with rank explicitly computable from the
graph.
