Northwest Airlines McDonnell Douglas DC-9-50

Northwest Airlines McDonnell Douglas DC-9-51, N780NC, is shown arriving at Miami in March 1993.

(Photo credit: Frank Schaefer)

Northwest Airlines McDonnell Douglas DC-9-51, N783NC, is shown departing Nashville on May 24, 2006 wearing the carrier’s 1989-introduced livery.

(Photo credit: Michael Carter)

Northwest Airlines McDonnell Douglas DC-9-51, N787NC, is shown arriving at Baltimore on April 2, 2008.

(Photo credit: Jason Whitebird)