The Maldives have all their PT6 engines on Power By The Hour...

The Maldives have all their PT6 engines on Power By The Hour (PBTH). That is PTB provides the engines which, for every hour of engine operation, the Maldives pay a fee to PTB. When an engine is due for a scheduled service PTB sends them a replacement engine (I believe several spare engines are positioned at the Maldives for unfortunate incidences anyway). Instead of the Maldives having a massive cost spike for overhaul or a hot section the engines are already paid for over many weeks of paying PBTH. Accountants enjoy this leveling of the costs. This business model has proved a winner for PTB. Of course, they also have numerous other customers who take the one-time cost.