Delivered as a C212B2 to the Portuguese Air Force on 28 July 1976. It was converted for photo mapping missions. The aircraft of 401 Esq was reserialled to 16521 as of January 1994. It was seen in May 2007 at the Museu do Ar restoration hangar at Sintra, then stored at Beja, seen operational between July 2008 and April 2010 and then stored at Montijo up to 2017. It was seen in the USA at North Hollywood (CA) in early 2018 and a year seen later stored at the United Aeronautical Corporation scrap yard near Tucson (AZ).

Taxiing out for the 2010 Independence Parade over Mexico City, PC-7 6521 is one of 88 PC-7s delivered to Mexico. It was delivered as EAP-521 and later reserialled to 6521, indicating use as a trainer with the Colegio del Aire. By January 2018, 6521 had been preserved in Tecamac with school CBT 2 Lic Carlos Pichardo, which is near Santa Lucia.

Reserialled to 16521 as of January 1994.