Hello poncho,
The q400's wheelbase is too wide for MZL's, even for the FK50 and Dash8's operating there is a little tight, Mzl's taxiways are 10m wide,, the runway is 15m wide and the maximum pavement resistance is set at 15.876kg, I don't remember the rwy slope but If my math is right it is around 5,68%, what's the minimum runway width for a 180* turn for the q400? What would be the weight of a q400 with a full pax load flight time of about 35mins and domestic ICAO fuel reserves?
You can find more details here
http://www.aerocivil.gov.co/AIS/AIP/.../30%20SKMZ.pdf