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Operators of Airbus A380s with Engine Alliance GP7200 powerplants are being ordered to conduct an urgent inspection of the engines' fan hubs for damage.
The US FAA's emergency directive follows the uncontained failure of a GP7200 which, it says, had accumulated 3,527 cycles since new.
It describes the powerplant as a "relatively high cycle engine". The directive requires removal of the fan if damage or defects are found during the one-time visual inspection.