Re: Post 508 --
certainly company sop to hold at 190 in icing conditions.
How long was the aircraft flying at 134 kts? Consider the angle of attack at 134 kts.
In looking at photos of the Dash 8 400, the flaps look like a slotted Fowler or Semi-fowler type.
I'll bet that there was ice accumulation on the bottom of the wings
behind the boots because of the slow airspeed and high angle of attack at 134 kts. There was probably ice buildup in the slot forward of the flaps.
That's why company sop was 190 kts in icing conditions. When the flaps were lowered, the leading edge airfoil of the Fowler flap which is supposed to provide added lift was spoiled because of ice accumulation.
We worried about this in the DC-3s though the 3 had a split trailing edge flap and no gap. But ice accumulation behind the boots was a worry. If the airspeed got too slow, we had no choice but to descend in order to keep the speed up.