The EU Aviation Safety Agency (EASA) has published a new Emergency Airworthiness Directive concerning Main Rotor Hub (MRH) sleeves on Airbus EC 225 LP helicopters.
An occurrence was reported of finding a cracked affected part. The investigation determined that this was a fatigue crack which had initiated from a significant corrosion pit, located in an area of the MRH sleeve with chipped paint. The surface protection had not been touched up. This condition, if not detected and corrected, could lead to structural failure of the affected part, possibly resulting in loss of a helicopter.
For the reasons described above, this AD requires a one-time detailed visual inspection (DVI) of each affected part and, depending on findings, accomplishment of applicable follow-on repetitive inspections and corrective actions.
Source: EASA via CAA.