ICAO = Incompetent, Corrupt, Absent, Out to Lunch
The reason the FAA should be "interested" is : GE engine, Boeing Airframe, Saudi's follow FAA regs (sort of) , FAA office in Jeddah, regular scheduled flights to the USA by Saudi Arabian Airlines, ect.. these kind of reasons.
If there was a reason for this engine coming apart, other than incompetence on the Thai's maint and the Saudi's allowing them to fly the aircraft out of their airspace the FAA should be interested in this event.
Satisfied ?