Just the facts, Lu
Mr Z, you seem very insistent on blaming the engines...a previous bad experience ?
Rereading the official report, page 16 :
In fact, it’s a requirement for the airline who installs the core engine to check its configuration and receipt and ensure that it complies with the manufacturers specifications.
and on page 18 :
the scratches and scores were directionally aligned and that they could have been caused from repeated contact from a blunt instrument, such as a screwdriver being inserted be-tween the tubes in order to force a clearance between them. There were no cracks initiated from the score or scratch marks
So, it appears to me that someone inspected the (incorrect) arrangement of tubes etc, and attempted to force them into a suitable clearance.
On page 17 :
It was evident that the interference and chafing occurred due to the mismatched installation of the post-mod fuel tube (P/N: FK30383) and pre-mod hydraulic tube (P/N: LJ51006).
The Mod in question, SB72-C625 says (on page 7 of the SB) :
Interchangeability of Parts : (1) It is essential that the parts are fitted as a set.
So. What are the facts about this "backward pipe fitting" story?