K-4002 was delivered to the Koninklijke Luchtmacht (KLu, Royal Netherlands Air Force) as the very first NF-5 for the KLu. The ceremony took place on 7 October 1969. The dual seater went into storage at Woensdrecht on 24 May 1988. The aircraft was sold to Venezuala as 1721 and delivered as such on 16 September 1992.
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