& if that happens, New Flybe will have covered their back & have clauses in the leasing contracts that will pay them compensation from the lessors, due to downtime. The A/C will have to be delivered in excellent condition just as they had to be handed back by Flybe v1 - and capable of the cycles they'll be put through.
Flybe v2 will also have access to the tech records of all the previous Q400 fleet and will know which airframes were constantly going tech, which ones had a leak here, or a sensor fault there. the hope is these will not be chosen, or these things will have been replaced prior to leasing.
..& the leasing contracts will likely be on more favourable terms to Flybe v2 this time too. No leasing company wants their planes sat on the tarmac somewhere.