It would seem to be directed at rear mounted engines, rather than the under wing slung types.
A few years ago, 10 or more, we had 2 A330's with CF-6 engines dual flame out in rain on descent. As a result, we had to start the APU for descent, select high flow from the packs, to lower the chances of compressor stall. We did get rid of the A330 with CF-6 engines and stuck with the RR.