takata #3209, re engine icing / relighting. It’s not clear which engine type or ‘report’ you are referring too.
The initial section (Mason, Strapp, & Chow) reports on a medium sized regional aircraft suffering ‘rollback’. For this aircraft / engine combination, some engines did not relight easily as the severe ice accumulation took some time to clear; also, the relight envelope was below FL200. In some instances the subsequent stages of the compressor were damaged and engine did not relight at all, or ran sub-standard.
For the large commercial transport engines, the report indicates that initial ice accumulation did not generate engine problems, but the relatively smaller amount of ice passing through the compressor as the ice melted did, i.e. a problem when exiting the conditions. In general, the effects were mild and although the report describes the instances of shutdowns as ‘failure’, it qualifies this in that all engines were restarted, even when damaged.
Thus, the ice and engine failure scenario is unlikely.