A very sad but regretablly very common occurance and engineers are exposed to this danger often as part of their jobs. Especially after maintenance when a leak check is required most companies have a restraint system available but often this is not used I've seen many engineers carrying out leak checks with out this equipment due to time pressure placed on them!
Please don't read this as speculation in this very sad case mu thoughts are with the fellows family!
Seem to remember a case in the 80's at British Aerospace when an engineer was sucked into a 146 didn't those things had enough pull to do that just goes to show how dangerous jet engines can be!