Hello Hahn
Yes, I appreciate that but the CFM-56 on the A319 does seem to aquire blade ice very quickly. Engineers have told me that the same engine on the B737 series does not aquire ice at anywhere near the same rate. It's been a while but I don't recall it being a problem on the V2500's either.
I recall landing in FZFG. It was "CAVOK" on top and the fog tops were about 600 feet agl, surface temp -3. By the time we were on stand perhaps after 7-8 minutes in the fog each blade had approx 2-3mm of ice on the back of the blades - not easily noticeable on a dark, foggy and cold walk round.
Engineers did their best but during the 15 second run up prior to departure the N1 vibs hit 6.5 momentarily before settling down to <1 - and off we went.
A4