Please ... i cant believe this crap people are writing about a proven machine as in a 155 ??? Ask Shell in Warri, Nigeria about a 155. Or pilots in Aby Dhabi that went back an fourth between a 412 and 139. I have been flying the 139 in high demand daily operations, often even 24 hour environment with one day per week scheduled maintenance. FOR 5 YEARS since 2006. The only other helicopter that compares is a 76C++ In terms of Class one (CAT A) performance there is nothing that compares until the EC175 comes out. So for your customer it is by far the safest machine out there!