If the DFO has recognised that there is a problem then at least it is a step in the right direction, considering last years profits were 3.91 Billion a few quid spent on replacing some of the worst engines would'nt hit the bottom line!!
The problem is, there are very few engines left for this airplane. We have only about five in addition to whatīs mounted on wings. Those are all the "C" engines left on the planet, full stop. Modification to "E" series engines would cost more than the airplanes originally cost DHL, (means new pylons as well as engines, for one thing) but it could be done. Itīs not even being considered at the moment.
A properly rebuilt "C" engine would be better than what we have at the moment, but the turnaround times on the engines are in the order of nine months for an overhaul, and those overhauls are minimal, to be kind.
In short, this problem is not going away anytime soon. Not unless drastic action is taken by the pilot body or until someone is seriously hurt, in my opinion.