Dublin-headquartered US pharmaceutical group Mallinckrodt has entered examinership for a second time in a bid to urgently tackle group debts of $3.6 billion. Grant Thornton’s Michael McAteer has been appointed interim examiner to the Irish parent company, which holds the group’s intellectual property, following an ex parte petition to Justice Michael Quinn in the High Court by company directors on Wednesday.  The move has not come as a surprise. The insolvent pharma giant came to court having already secured Chapter 11 bankruptcy protection in Delaware as part of a pre-pack restructuring proposal that will see senior creditors engage in a…