Originally Posted by
ERJF15
The ATR (basically built by Airbus) has had and still does have a few design issues. Roselawn, is where it was discovered that the ATR didn't have enough ice protection. The deicing boots were too small. There have been incidents within the last year or so in DFW with ice vs. the ATR
The "correction" only extended the outer boots from 7.5 to 12.5% of chord, but the ice accretion of this wing design demonstrated ice can accrete significantly beyond 12.5%. It was a "band-aid" fix, especially considering this wing design's suseptibility to hinge-moment reversal when ice ridges form on the front upper section of the outer wing.
The problem was well know prior to Roselawn, but nobody faced it until they couldn't deny it any longer. Great bird for Florida and the Carribean though as it can haul a good load and has good cargo hauling capability.