Teadriver -
"A Dash 8 was lost a few years ago in south west UK, spinning following loss of control during a Vmca check on an air test"
..... the aircraft was a Dash 7 (VP-CDY). The airtest was for a 3-engine climb for C of A renewal. Schedule called for Flap 25, Eng #1 shut-down, Eng #2, 3 and 4 Take-off power, climb at V2 (80kts at planned weight). Unfortunately the Flaps were left at 0, and the aircraft stalled at 90kts. Aircraft descended at a high rate to impact. AAIB report states that it is not possible to state whether the subsequent path was a spin or a spiral dive, as the recorded "g" suggested a spiral dive, but the low IAS suggested a spin. Full aft elevator was held throughout the descent, and full power on 3 engines also kept almost to impact. CVR was u/s, findings were based only on FDR recordings.
Report is available on AAIB website