Another project to look at is the US Army's Lakota Helicopter Project where 300+ helicopters were bought "Off The Shelf" from BBK/Eurocopter.
Rigga,
They had a lot of problems with these at first as no US military helicopter previously had air conditioning fitted, so USA PLC ommited it from the Lakota even though the manufacturer advised against it, then suffered a lot of avionics failures due to overheating..
read
UH-72A Lakota Overheating Problem