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Popular models of fast radio bursts (FRBs) involve the gravitational collapseof neutron star progenitors to black holes. It has been proposed that theshedding of the strong neutron star magnetic field ($B$) during the collapse isthe power source for the radio emission. Previously, these models have utilizedthe simplicity of the Schwarzschild metric which has the restriction that themagnetic flux is magnetic "hair" that must be shed before final collapse. But,neutron stars have angular momentum and charge and a fully relativistic KerrNewman solution exists in which $B$ has its source inside of the event horizon.In this letter, we consider the magnetic flux to be shed as a consequence ofthe electric discharge of a metastable collapsed state of a Kerr Newman blackhole. It has also been argued that the shedding model will not operate due topair creation. By considering the pulsar death line, we find that for a neutronstar with $B = 10^{11} - 10^{13}$ G and a long rotation period, $>1$ s this isnot a concern. We also discuss the observational evidence supporting theplausibility of magnetic flux shedding models of FRBs that are spawned fromrapidly rotating progenitors.

General Relativistic Considerations of the Field Shedding Model of Fast Radio Bursts