The Sikorsky S-64 Skycrane is an American twin-engine heavy-lift helicopter. It is the civilian version of the United States Army's Sikorsky CH-54 Tarhe heavy lifter. Since 1992, the type certificate has been owned by Erickson Inc. (then trading as Erickson Air-Crane; in addition to the provision of OEM and MRO functions, Erickson has undertaken the manufacture of new S-64s, as well as the remanufacturing of existing CH-54s, using the S-64 Aircrane designation.