Built as an Avenger TBM-3E variant, delivered to the US Navy 22nd Feb.1945 as 69502. To the FAA 15th May 1953 as XB446. Converted to ECM6B standard at Gosport 1955/1956. Taken into storage, initially at RNAS Abbotsinch 1962 and later at RNAS Culdrose 1963. To the FAA Museum, Yeovilton 9th April 1968 for display there (which it still is in 2022).