Built to contract 14293 and delivered to No. 511 Squadron Royal Air Force Transport Command on 6 July 1960, she was named 'Procyon' and serialled XM491. She operated within the Britannia pool at RAF Lyneham from 15 May 1961. XM491 was withdrawn from service by the RAF and was ferried to RAF St Athan on 9 June 1975 for storage following a flying career of 18 077.30 hours and 7717 landings. Purchased on 8 September 1975 by Aer Turas of Ireland and delivered to Luton Airport, she was given the registration EI-BBH, and named 'City of Cork'. She entered service with Aer Turas on 28 October 1975. EI-BBH was leased by Cyprus Airways on 9 September 1976 and returned on 12 April 1978; by the end of that month, she had accumulated a total of 22 330.04 hours and 9038 landings.

Leased by Gemini Air Transport from 23 March 1979 until 23 May 1979 when she was returned to Aer Turas. EI-BBH was purchased by Katale Aero Transport from November 1981 and registered 9Q-CMO in the name of Transair Cargo (a subsidery of Katale). No longer in service and possibly broken up which was confirmed in early 2003.