Built as C-123B 54-0603, converted to a C-123K and later UC-123K. Served in Vietnam before being withdrawn to MASDC in 1981 and sold onto the civilian market as N4254H circa 1991. Various owners including the Olympic Flight Museum and Discovery Air Charters of Titusville FLA. before moving to Alaska in 2008. Was to be operated by a local construction company who intended to use it haul materials to remote sites, the aircraft has remained grounded since the death of the owner in the crash of their other Provider, N709RR in August 2010.

Delivered to the US Army in 1954 as L-20A 53-2807. Withdrawn to MASDC at Davis Monthan in 1972 and sold as N63315 to Andrews University in Michigan in October 1973. Bought by Newcal Avn in 1994, Alpine Aviation in 1995, Kenmore Air Harbor in 2008 and a private owner in Kenai Alaska in June 2011 before joining Crystal Creek in September 2011. Re-registered N602AK in 2012.

Built in 1946, developed from the Rearwin Skyranger. Production ceased in 1947 after the company became insolvent

This C-123 was highly polished and reflections off the skin made photographing the aircraft in sunny conditions a bit of a challenge. It hasn't flown since the owner was killed in the crash of C-123K N709RR on the southern flank of Mount Healy, Alaska in 2010.