Thanks tdracer. So this must be a known phenomenon with narrow body engines with higher cycle rate and should be a easy fix.
BTW, cynic in me still thinks even a good engine goes bad as soon as it is hung on jinxed 787. Honeywell sold thousand+ of same ELTs, on a B787, it went up in flames.
aeromech3
I heard another operator needed early overhaul of their CFM56s, apparently they were failing prematurely by flying to ME. Is this something to do with sand??