A Husband and Wife were skiing together and both were wearing beacons and airbags. The wife deployed her airbag and survived, the husband was unable to deploy his airbag and was found using his beacon, but died.
http://icburton.icnetwork.co.uk/news/natnews/tm_headline=british-skier-dies-after-avalanche%26method=full%26objectid=27898442%26siteid=82449-name_page.html
http://icburton.icnetwork.co.uk/news/natnews/tm_headline=british-skier-dies-after-avalanche%26method=full%26objectid=27898442%26siteid=82449-name_page.html