Originally Posted by
airsound
Oh no! Not another problem for the much troubled Pagasus? It's powered by P&W 4062 engines, part of the same 4000 series as the Denver UAL 777 (P&W4077) and the Belgium Longtail Aviation 747 (P&W4056), both of which recently rained parts on the ground below.
Boeing recommended grounding the P&W 777s, but there's been no mention, as far as I can see, of grounding the P&W 747 or the KC-46.
airsound
As esscee notes, you're talking apples and cumquats. The PW4000/94" engine as installed on the 767 and 747-400 has
well over 150 million flight hours and has been in-service for over 3 decades. You're going to have the odd failure when you have an engine that has been in-service for those sort of hours. We also don't know what sort of maintenance Longtail was subjecting their engines to - some freight operators are pretty stingy in their maintenance practices.
While there is considerable commonality between the high pressure portions of the various PW4000 models, the low pressure sections are
completely different between the 94", 100" (A330), and 112" (777) variants. There is simply
no connection between the fan blade failures on the PW4000/112", and the PW4062/94" engine installed on the KC-46, aside from their being designed and built by the same company.