  Since the 3+1 neutrino models with one light sterile neutrino turn out to be
not very effective, at least two light sterile neutrinos may be needed to
reconcile the solar and atmospheric neutrino experiments with the LSND result,
{\it if} this is confirmed by the ongoing MiniBooNE experiment (and when the
CPT invariance is assumed to hold for neutrino oscillations). We present an
attractive 3+2 neutrino model, where two light sterile neutrinos mix maximally
with each other, in analogy to the observed maximal mixing of muon and tauon
active neutrinos. But, while the mixing of $\nu_e$ and
$(\nu_\mu-\nu_\tau)/\sqrt2 $ is observed as large (though not maximal), the
mixing of $\nu_e$ with the corresponding combination of two light sterile
neutrinos is expected to be only moderate because of the reported smallness of
LSND oscillation amplitude. The presented model turns out, however, not to be
{\it more} effective in explaining the hypothetic LSND result than the simplest
3+1 neutrino model. On the other hand, in the considered 3+2 model, the
deviations from conventional oscillations of three active neutrinos appear to
be {\it minimal} within a larger class of 3+2 models.
