Helicopter Bell UH-1H Iroquois Serial 13270 Register 72-21571 used by US Air Force USAF ,US Army Aviation Army. Aircraft history and location Aircraft History 72-21571 US Army Aviation US Army, conv to UH-1V US Air Force Bell TH-1H Iroquois USAF. UH-1H conv to TH-1H May11 23 FTS 23 FTS Send Updates Use APP to upload photo @ (optional) When Now? / / Send