Helicopter Sikorsky CH-54B Tarhe Serial cancelled Register 71-18491/18498 used by Sikorsky Helicopters. Built 1971. Aircraft history and location Aircraft History 71-18491/18498 Sikorsky Helicopters Sikorsky S-64B/CH-54B asgd US Army serials 71-18491/18498 contract cancelled by US Army airframes not built. Send Updates Use APP to upload photo @ (optional) When Now? / / Send