Examine recourse claim against the person responsible; rescue costs are recoverable damage.
If another skier caused the accident through blameworthy conduct, all proven rescue costs (helicopter, piste rescue, mountain rescue, medical repatriation) are damage items recoverable under Sections 1293 ff, 1325 ABGB from that person or their liability insurer. The causal link must be established.
Secure immediately: the piste-rescue incident report, a police or official record, witness details. Also notify all your own insurers and document the amounts they reimburse, since the person responsible covers the uncovered remainder or the full loss.