Delivered to the USAF on 16 Mar 1955 as a RC-121D. Later converted to an EC-121H. Formerly with the 551st AEWW. Arrived for storage at MASDC on 29 Dec 1969. To the Museum in Oct 1973. Returned to MASDC on 28 Oct 1981. Sadly now scrapped with just the cockpit section saved.

I had seen this EC-121 in the Pima Museum in 1980, but by 1983 it had returned to MASDC, having been replaced in the Museum by another Constellation.

This aircraft served as 53-0535 with the 551st AEW Wing based at Otis AFB before arriving at AMARG during Dec. 69 where it had the PCN/Inventory No. CK084. It was photographed in the restoration compound of the Pima Air & Space Museum.

Delivered to the USAF in March 1955 this aircraft was retired to DMAFB in December 1969. On display at the Pima Air and Space Museum from 1973 to 1981. Sold at auction and assigned the civilian registration N51006, it was relegated to a Tucson scrapyard and used as a source of spare parts for many years. Aircraft purchased by the Australian Historical Aircraft Restoration Society (HARS) in 2007. Moved from the Allied scrapyard in June 2008. Subsequently scrapped at the museum and forward fuselage section currently stored at Dynamic Aviation headquarters in Bridgewater, Virginia.