Dave (GL) Warren would know all about formation tip strikes in RAN Wessie: and both involved flew to a safe landing
Was the guy flying SAR that day. Biggest concern anybody in charge had was recovering the depleted uranium balance weights that had been spread about the countryside, don't know if they ever found any.
One crew flying a OH-58 reputedly landed on a sand dune, shut down and went about their business. Upon return, no helicopter. Had slid down the rather high dune into a gully, fortunately undamaged, so able to crank and go home.