Most (all?) Tent 1000s are on TotalCare which, in effect and depending upon which TC version, requires RR to provide serviceable powerplants at all times for a fixed hourly / cyclic fee. If they cannot do so for anything other than e.g. force majeure or operator fault they pick up the tab for most of the consequential losses. The IPT blade corrosion issue is so extensive that they have run out of both shop capacity and spare engines - hence aircraft grounded by a number of airlines including Air NZ. The shop capacity issue has also impacted other engines and TC programmes because there is no capacity to undertake scheduled SVs on other Trent models. RR are buying / leasing in other Trent models from the used / part-out market in order to try to support the TC programmes. The T1000 TEN is, apparently, not entirely immune which implies similar issues may arise on the TXWB and T7000. This is all going to cost them a bundle.