About 4 years ago,a Bristow 332 Super Puma helicopter got struck while cruising over the North Sea. The charge exited the helicopter at the tail rotor blade and caused one of the tip weights to detatch itself. The tail rotor vibration pulled the tail gearbox off of its mounting and the aircraft ditched successfully in quite heavy seas. Everybody got out ok. Eurocopter, the UK CAA and the company have done a lot of work on lightening strikes since to try to reduce the risk of another ditching.
I had a strike once on the North Sea in the same type of helicopter. Didn't know anything about it until the engineers discovered a hole the size of my fist in a main rotor blade. The main blades are composite with a metal leading edge. Just thought you'd like to know...