- A mechanical instability of an incompressible Fermi liquid drop with respect to surface distortions is considered. It is shown that the Fermi surface distortion (FSD) reduces the instability-growth rate for surface fluctuations due to its effects on both the viscosity and the increase in the stiffness coefficient. The dependence of the limiting temperature Tlim on the mass number and the multipolarity of the nuclear-surface distortion is calculated. It is shown that Tlim is not influenced by the FSD effect. 2002 MAIK "Nauka/Interperiodica".