Safety Recommendation 2011-036
It is recommended that the European Aviation Safety Agency (EASA) re-evaluate the continued airworthiness of the main rotor gearbox fitted to the AS332 L2 and EC225 helicopters to ensure that it satisfies the requirements of Certification Specification (CS) 29.571 and EASA Notice of Proposed Amendment 2010-06.
What reaction has that provoked? Would EASA remove the Airworthiness Certification of the MGB and force Eurocopter to redesign that component, to include the cockpit warning systems for chip detectors in the Epicyclic module and improve the oil system to better expose oil borne chips to those new detection systems?
It sounds like this situation is not all that different than the Sikorsky S-92 gearbox problems....different symptoms but pretty much a common problem in that the certification standards left users vulnerable to fatal flaws.