  We experimentally confirmed the threshold behavior and scattering length
scaling law of the three-body loss coefficients in an ultracold spin-polarized
gas of $^6$Li atoms near a $p$-wave Feshbach resonance. We measured the
three-body loss coefficients as functions of temperature and scattering volume,
and found that the threshold law and the scattering length scaling law hold in
limited temperature and magnetic field regions. We also found that the
breakdown of the scaling laws is due to the emergence of the effective-range
term. This work is an important first step toward full understanding of the
loss of identical fermions with $p$-wave interactions.
