The magazine contains a detailed article by Debra Werner about No Fault Found entitled "A maddening, costly problem" and starts with a case study of a Flybe Q400 aircraft incident in 2012 that resulted from an NFF and intermittent fault chain of events.  

"Maintenance personnel routinely pull suspicious parts from aircraft, only to discover that they test just fine in the lab. Air crews and managers are left to scratch their collective heads about the true origins of what looked like a part failure in mid-flight. Instances of no fault found are wasteful and potentially dangerous, which is why the industry has grown more serious about addressing the problem."