Eurocopter, which builds EC135 helicopters, said the decision to ground some of the aircraft fleet was taken by the operator Bond Air Services:
Eurocopter is in close contact with Bond to fully support theactivities.
Eurocopter does not recommend any further action for the other EC135 aircraftin service around the world.
EASA [the European Aviation Safety Agency] has never issued an Airworthiness Directive(AD) to ground the EC135 fleet ever since its entry into service in 1996.
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How to find out which machines are affected and what to do if yours is one of them.