Grenville, HUMS data from the EC225 is downloaded after each flight now. I believe that Bristow always did download after each flight, CHC and Bond also do now, for the 225s anyway.
Of course, we don't know whether or not mechanical issues played a part or not in this accident.
However, as someone who is on the oil company side of aviation, I have a policy that HUMS data is downloaded after every flight (not sector) for all types of aircraft we contract.
Secondly, I will be working with our helicopter contractor to look at the feasibility of at least periodic in flight HUMS transmissions back to base, much like large jets use their ACARS. Since ACARS only sends short and simple messages I am not sure where packets of HUMS data will be in terms of data size but it must be doable. I want to see some "next step" innovation from Helicopter Operators and OEMs.