Helicopter Sikorsky CH-3C Serial 61-513 Register 63-9681 used by US Air Force USAF. Built 1964. Aircraft history and location Aircraft History 63-9681 US Air Force 1964-05-21del USAF as CH-3C 63-9681 21May64 conv CH-3E xfer 38th ARRS, Ton Son Nhut AFB, Vietnam Destroyed S.E.A. 13Jul70. 38 RQS 1968-04-18 Sikorsky CH-3E 18apr68 1970-08-1321st SOS Skycap 36 in Vietnam/Laos date unk w/o 13aug70 hit by 12.7mm rounds near Ubon Thailand, 4 fatalities, 1 survivor 21st SOS Send Updates Use APP to upload photo @ (optional) When Now? / / Send