Originally Posted by
43Inches
The Roselawn crash was an ATR-72-212 and was aileron reversal caused by ice bridging behind the outer sections of deice boots…….
The company’s ‘quick fix’ was to base the ATRs south, and deploy Saab340 north.
Not that Saab340 is invincible in icing. I recall a day flying Glasgow to Stornaway (FL160)when despite operating the boots, the IAS reduced to 160kts with MCP now selected. No ice showing on the wings No option but to descend (500fpm) to maintain speed until a significant increase in IAS occurred by FL120. On the return leg flew west of the GC track !