Helicopter Sikorsky CH-3C Serial 61-510 Register 63-9678 used by US Air Force USAF. Built 1964. Aircraft history and location Aircraft History 63-9678 US Air Force 1964-03-09del USAF as CH-3C 63-9678, 09Mar64 Destroyed S.E.A. 30Dec67 1967-12-30 Sikorsky CH-3E 20th HS, w/o 30dec67 in Laos During landing at Lima Site 85, they approached from the wrong direction, hitting trees and crashed Send Updates Use APP to upload photo @ (optional) When Now? / / Send