The Theodore Jay Johnston Boeing Aircraft Collection contains slides and technical documentation that relates to Johnston's personal history with the Boeing B-17 Flying Fortress, the Boeing B-47 Stratojet, and the Boeing B-52 Stratofortress.

At the beginning of the collection are forty-four (44) slides and a set of notes related to the B-17. The slides are a mix of color and black-and-white and the majority were taken during World War II, likely from 1942-1945. They depict the Boeing B-17 in flight, being loaded with ordnance, and with flak damage. Three (3) slides show the The Museum of Flight Boeing B-17F, two (2) prior to its restoration and one (1) after restoration. There is also a set of notes from a presentation that discussed the role and contributions of the Boeing B-17 bomber in World War II and was held on October 12, 2002 at Pierce College, Puyallup, Washington. The slides were a part of this presentation as well.

Following the slides is a folder on the Boeing B-47 Producibility Study, consisting of engineering documentation and an official Boeing producibility study on the Boeing B-47 Stratojet, circa 1944-1953. The report, prepared by the Producibility Group for which Johnston worked, included drawings by Johnston. The technical report outlines changes to economize production, some of which may have been implemented in the final production procedures. Also included with the report are approximately 100 mimeographs of illustrations for cost/weight saving engineering studies as well as 50 original illustrations for the cost/weight saving engineering studies. Other documents included with this documentation include a maintenance solution for the Boeing B-52 Stratofortress and a cost accounting call-out for the Boeing Model 377 Stratocruiser.