ATR engine anti-ice or de-ice

[low n' slow]

Hi!
I'm looking for answers only from ATR technicians or pilots. With the risk of being shot down and laughed at:

I heard rumours that the ATR engine anti-ice system actually consists of boots around the intake. I remember seeing it for my self and not believing it, and then I heard a friend mention it too. Is it really so? Could someone please shine some light on this topic? Having a de-ice system as opposed to anti ice system around the intake seems a silly solution to me.

/LnS

[Clandestino]

There are no silly questions.

ATRs indeed have de-icing boot around engine intake.

No, it is not a silly solution.

Behind intake is an S-duct with bypass door, which acts as centrifugal separator and prevents larger particles, such as ice shards, from reaching the LP compressor - BTW it's centrifugal type, less prone to fod than axial ones.

Clandestino
Airbus driver.

[inducedrag]

History of PIA :: View topic - PIA ATR 42-500 Icing & Ice Removal - Photos by Aroosh (http://www.historyofpia.com/forums/viewtopic.php?t=13215)
This link gives a good understanding of ATR anti & deicing

[Brian Abraham]

Not unique, the Avanti also uses boots.

[low n' slow]

Thanks all for enlightening me!

/LnS