The FAA is reissuing and revising a Special Airworthiness Information Bulletin (SW-08-03R4) covering recommendations for rotorcraft powered by turboshaft engines flying into snowy or icy conditions. The SAIB describes procedures to reduce the probability of an uncommanded in-flight engine shutdown due to snow and/or ice ingestion and reminds operators that most helicopters are not approved/equipped for flight into icing conditions.
The British Air Accidents Investigation Branch (AAIB) has issued its report on an accident last January. A British-registered Robinson R44 (G-NUDE), ditched and sank on an attempted flight between Cabo de Hornos, Chile, and Teniente Marsh Airbase on King George Island, Antarctica. The two occupants were rescued after 10 hours in seas of 35 degrees F.