  A short X-ray burst was observed from the radio-loud magnetar 1E 1547.0-5408
in 2022 April. Unusually however, the source stopped showing radio pulsations
$\gtrsim 3\,$weeks prior to the burst. After recovery, radio timing revealed
that the object had also undergone a modest glitch. A model for the overall
event is constructed where an initially mild perturbation adjusts the magnetic
geometry near the polar caps, leading to shallow fractures. Crustal ejecta or
particles leaking from a pair-plasma fireball pollute the magnetospheric gaps,
shutting off the pulsar mechanism, but the energy release is not yet large
enough to noticeably enhance the X-ray flux. This perturbation gradually ramps,
eventuating in a large-scale energy redistribution which fuels the burst. The
star's mass quadrupole moment changes in tandem, issuing a glitch. Some
quantitative estimates for the magnetic reconfiguration under this
interpretation are provided, based on a quasi-static model where the fluid
evolves through a sequence of hydromagnetic equilibria.
