C-131 SamaritanConvair C 131 Samaritan airplane model. The C 131 is a USAF transport version of the Convair 240 340 440 series commercial airliners. The first Samaritan, a C 131A derived from the Convair 240, was delivered to the Air Force in 1954. It was similar to the T 29 trainer (also based on the Convair 240) flown by the USAF since 1949 to instruct navigators, bombardiers and radio operators. The C 131 was acquired primarily for medical evacuation and