NASA's globe trotting C-118 N428NA broke through the taxiway during its mission to Ecuador. The aircraft was used to calibrate satellite tracking stations and Ecuador was home to one of them atop Mt Cotopaxi. Photo from: Maury Kitces

This P-3 was TOC by the USN with the BuNo. 148276. It was the third of three frames modified into a NP-3A for the US Naval Research Laboratory before being transferred to NASA as, firstly, N927NA and then N428NA. It was on display as an outside exhibit at the National Naval Aviation Museum in Pensacola, Florida although I believe it has now been scrapped..

This was originally the third Electra prototype before conversion to be the first YP3V-1 Orion. It was preserved outdoors at the National Museum of Naval Aviation, Pensacola, Florida for a number of years but unfortunately was scrapped there in 2016.

A NASA ex-military transport C-118A on Heathrow Southside near the Pan Am hangar (registration re used on an Orion prototype). Viscount in last BEA scheme on short finals to 28L

N428NA joined NASA in 1965. It was transferred to the USAF Museum in 1979 and scrapped three years later. Has NASA 428 on the nosewheel doors.

Scrapped in 2016.