Down in the Channel Islands we see a least four aircraft from the Q400 fleet and we can work out the servicability by the schedules they keep or not i the case may be
With 21 Q400's now in the fleet i'm not so sure that you can gauge serviceability by just seeing 4 each day. 2 new Q400's have been delivered so far this year, both at the end of January with more to follow in the coming months. Yes the 146 leases are coming to a close however there will not be any shortage to cover the scheduled program this year. It is likely that a couple 146's will disappear at some point but after that it'll be 'one in, one out' as the EMB195's come online.