Dozens of Airbus A380 planes could face safety checks after debris from an explosion two years ago was discovered in Greenland's ice sheet.
The wreckage was part of an Airbus A380 jet engine belonging to Air France flight 66, which was flying from Paris to LA when the incident happened in September 2017.
No one on board the plane was hurt and the aircraft managed to land in Canada at an air force base.
Now a probe into possible manufacturing flaws has been ordered by the US Federal Aviation Administration (FAA); it says the 380 operators using Engine Alliance GP7200 engines will be have to check for cracking and wear.
It is not known yet what checks will be required or if planes will be taken out of service.
The FAA told North Wales Live: "This AD was prompted by an uncontained failure of the engine fan hub. The FAA is issuing this AD to detect defects, damage, and cracks which could result in an uncontained failure of the engine fan hub assembly.
"The unsafe condition, if not addressed, could result in uncontained failure of the engine fan hub assembly, damage to the engine, and damage to the airplane."
Engine Alliance is now expected to order airlines to carry out checks for any flaws on similar parts in its engines, which power some 60 percent of the 237 A380s in service.
A spokesperson for Airbus said: "We’re cooperating with the investigators which include the BEA and the FAA as well as Engine Alliance (the engine manufacturer)."
Dubai-based Emirates, Korean Air, Qatar Airways and Etihad and are the other aircraft operators with planes using Engine Alliance GP7200 engines.
Engine Alliance is one of two engine suppliers (the other is the UK's Rolls-Royce) for the Airbus A380.
The two-year probe into the incident is not yet complete and is likely to look at other factors such as the loads or physical forces on the engine and wing structure.
General Electric and United Technologies unit Pratt & Whitney, which co-own Engine Alliance, are yet to respond to requests for comment.
