This Convair is pretending to be a HC-131A, but in fact it's a Convair 240-11 (ex N280P) which never saw any military service. It was donated to the Castle Air Museum in 1999 and registered to them as N280P on 23 Jun 1999. By Dec 2003 it had been restored in nice USCG markings as "5785". By Jul 2008 those markings had been removed in preparation of a repaint, which is seen in progress in this photo. By Oct 2011 it was back in now very poorly done USCG markings, again as "5785".

Originally USAF C-131 52-5785 this Convair was transferred to the US Coast Guard in 1976. Pictured in the twilight of it's military service, the aircraft was sold as N27232 in May 1982.

Joining the USCG in 7.76 after retirement by the USAF (52-5785), this Convair returned to DM AFB in 10.81 and was sold to Florida Aircraft Leasing as N27232 in 5.82, but her fate after that goes unrecorded

Rather poorly disguised as a US Coast Guard HC-131A, this is in fact a civilian CV-240. She first served with Swissair as HB-IRT, and then briefly with Transocean Air Lines as N1018C. Having become N280P she was for some reason seized by the sheriff of Salt Lake County in 1975. She was moved to Castle in 1999.