SYNOPSIS
The Air Ambulance flight took off from Shannon Airport at 13.03 hrs enroute to St. Johns, Newfoundland and Miami. On climbing through 16,000 ft the crew heard a loud bang and noted a rise in the temperature of the L.H. engine. A visual inspection noted a section of the left de-ice boot had separated from the wing. The LH engine was retarded to flight idle and the aircraft returned to Shannon, where it landed safely at 13.24 hrs.