  Solar coronal rain is classified generally into two categories: flare-driven
and quiescent coronal rain. The latter is observed to form along both closed
and open magnetic field structures. Recently, we proposed that some of the
quiescent coronal rain events, detected in the transition region and
chromospheric diagnostics, along loop-like paths could be explained by the
formation mechanism for quiescent coronal rain facilitated by interchange
magnetic reconnection between open and closed field lines. In this study, we
revisited 38 coronal rain reports from the literature. From these earlier
works, we picked 15 quiescent coronal rain events out of the solar limb, mostly
suggested to occur in active region closed loops due to thermal nonequilibrium,
to scrutinize their formation mechanism. Employing the extreme ultraviolet
images and line-of-sight magnetograms, the evolution of the quiescent coronal
rain events and their magnetic fields and context coronal structures is
examined. We find that 6, comprising 40%, of the 15 quiescent coronal rain
events could be totally or partially interpreted by the formation mechanism for
quiescent coronal rain along open structures facilitated by interchange
reconnection. The results suggest that the quiescent coronal rain facilitated
by interchange reconnection between open and closed field lines deserves more
attention.
