JS1226: Verification of Low Pressure Compressor Rotor Speed for A Boeing 707-387C Powered by JT3D-7 Engines, 1986-04-24, Box: 10 , Folder: 8. Shannon Engineering, Inc., records, 8746. Division of Rare and Manuscript Collections. https://aspace3-test.library.cornell.edu/repositories/2/archival_objects/766747 Accessed June 14, 2026.