The Sikorsky CH-54 Tarhe is a twin-engine heavy-lift helicopter designed by Sikorsky Aircraft for the United States Army. The civil version is the Sikorsky S-64 Skycrane. The Army purchased 105 CH-54s before its discontinuation. The S-64 Aircrane is still in production. There are currently numerous complete and partial airframes in existence for this aircraft. Some CH-54's and some S-64's (both E and F models) are owned, and have been remanufactured, by Erickson Air-Crane Inc.United States Airworthy CH-54A 67-18427 – N793HT operated by Helicopter Transport Services in Aurora, Oregon."FAA Registry: N793HT." faa.gov Retrieved: 2 August 2021. 67-18429 – N429C privately owned in Yuba City, California. 67-18430 – N7095B operated by Siller Helicopter in Yuba City, California. 68-18447 – N792HT operated by Helicopter Transport Services in Aurora, Oregon."FAA Registry: N792HT." faa.gov Retrieved: 2 August 2021. 68-18455 – N9125M operated by Siller Helicopter in Yuba City, California. 68-18458 – N795HT operated by Helicopter Transport Services in Aurora, Oregon."FAA Registry: N795HT." faa.gov Retrieved: 2 August 2021. CH-54B 69-18463 – N720HT operated by Helicopter Transport Services in Aurora, Oregon."FAA Registry: N720HT." faa.gov Retrieved: 2 August 2021. 69-18466 – N721HT operated by Helicopter Transport Services in Aurora, Oregon."FAA Registry: N721HT." faa.gov Retrieved: 2 August 2021. 69-18467 – N718HT operated by Helicopter Transport Services in Aurora, Oregon."FAA Registry: N718HT." faa.gov Retrieved: 2 August 2021. 69-18468 – N722HT operated by Helicopter Transport Services in Aurora, Oregon."FAA Registry: N722HT." faa.gov Retrieved: 2 August 2021. 69-18469 – N719HT privately owned in Wilmington, Delaware. 69-18470 – N715HT operated by Helicopter Transport Services in Aurora, Oregon."FAA Registry: N715HT." faa.gov Retrieved: 2 August 2021. 69-18484 – N716HT operated by Helicopter Transport Services in Aurora, Oregon."FAA Registry: N716HT." faa.gov Retrieved: 2 August 2021. On display YCH-54A 64-14203 – United States Army Transportation Museum at Fort Eustis near Newport News, Virginia. CH-54A 66-18409 – 1st Cavalry Division Museum at Fort Hood in Killeen, Texas. 67-18418 – Stead Army National Guard Base in Reno, Nevada. 67-18424 – Combat Air Museum in Topeka, Kansas. 68-18437 – Pima Air & Space Museum in Tucson, Arizona. 68-18438 – United States Army Aviation Museum at Fort Rucker near Daleville, Alabama. 68-18439 – Museum of the Kansas National Guard in Topeka, Kansas. CH-54B 68-18434 – Mississippi Armed Forces Museum at Camp Shelby near Hattiesburg, Mississippi. 69-18465 – New England Air Museum in Windsor Locks, Connecticut. 69-18479 – Birmingham Air National Guard Base in Birmingham, Alabama. 70-18486 – Russell Military Museum in