McDonnell Douglas DC-9-30
		Northwest Airlines McDonnell Douglas DC-9-31, N922RW, is shown at San Diego Lindbergh Field in August 1987.
		Northwest Airlines McDonnell Douglas DC-9-31, N961N, is shown at Washington's Dulles Airport in May 1987 wearing Northwest Airlines name titles and tail colors and Republic Airlines fuselage colors following the merger of the two carriers.
		Northwest Airlines McDonnell Douglas DC-9-31, N9335, is shown at Dulles International Airport in May 1987 wearing yet another version of the post-Republic merger color scheme with Northwest name titles and older Republic fuselage colors.
		Northwest Airlines McDonnell Douglas DC-9-31, N9336, is shown at Orlando International Airport in August 1991 wearing the carrier's 1989 color scheme.