Originally Posted by Willie Everlearn
The Fredericton accident was due to stall in the flare during icing conditions AND retraction of flaps prematurely in a low energy state, thereby increasing the stall speed.
Pilot error.
From the TSB Report, to which I provided the link above:
2.4.4.4 Flap Movement
The flaps had just started to move when the aircraft stalled and, although there was probably some effect on lift and drag, the overall effect on the aircraft stalling was concluded to have been minimal.