I wonder if it is more indicative of a problem with Boeing's quality control.
There is a report that the serious fire on the cockpit of an Egiptair 777 was possibly caused because a clamp supporting the first officer's wiring to the mask light panel was missing, not sleeved and a large wiring loop found. Boeing delivered around 280 B777 with this error, which goes against the design.
Now we have the 787 with fuel line connectors not properly installed. Wonder how much all this is costing Boeing?