Although many recent sources refer to this as "Flight 599" (for example, page 35 of College Football's Great Dynasties: Notre Dame by Roland Lazenby, published in 1991), this seems to be a corruption; older sources, along with other recent sources, refer to it as "Flight 5" (an older example is page 127 of The Only Way to Fly: the Story of Western Airlines, America's Senior Air Carrier by Robert J. Serling, published in 1976). Transcontinental & Western Air's own timetables from this period have no "Flight 599" or any flight numbers with more than two digits, and its transcontinental flights all have one-digit numbers, as can be seen in Airline Timetable Images' scans of T&WA's February 1, 1931 and April 20, 1931 timetables. The latter timetable includes a "Flight No. 5" with the same route and schedule as the flight which crashed.
Eckert William G. (March 1982). "The Rockne crash: American commercial air crash investigation in the early years". American Journal of Forensic Medicine and Pathology. 3 (1): 17–27. doi:10.1097/00000433-198203000-00006. PMID7046424. S2CID22056678.
faa.gov
tc.faa.gov
History of Aviation Safety Oversight in the United States, DOT/FAA/AR-08/39 , Air Traffic Organization, Operations Planning, Office of Aviation Research and Development, Federal Aviation Administration, U.S. Department of Transportation, Washington, DC 20591, Final Report July 2008
Allen, Frederick, "The Letter that Changed the Way We Fly",[permanent dead link]American Heritage of Invention & Technology, Fall 1998, with photos of the post-Rockne-crash letter from TWA president Jack Frye seeking a newer airliner (the letter that would trigger development of the DC-3).
irishlegends.com
Friedman, Herbert M.; Friedman, Ada Kera (31 March 2001). "The Legacy of the Rockne Crash". Aeroplane. UK. Archived from the original on 13 July 2011 – via University of Notre Dame Archives website "Reflections from the Dome".
"The Last Flight of Knute Rockne" web page, in "Moments" section of "125 Football" website, University of Notre Dame: photos of funeral, newspaper clippings, video of Irish coach Ara Parseghian's boyhood reminiscence about the tragedy.
Eckert William G. (March 1982). "The Rockne crash: American commercial air crash investigation in the early years". American Journal of Forensic Medicine and Pathology. 3 (1): 17–27. doi:10.1097/00000433-198203000-00006. PMID7046424. S2CID22056678.
Eckert William G. (March 1982). "The Rockne crash: American commercial air crash investigation in the early years". American Journal of Forensic Medicine and Pathology. 3 (1): 17–27. doi:10.1097/00000433-198203000-00006. PMID7046424. S2CID22056678.
timetableimages.com
Although many recent sources refer to this as "Flight 599" (for example, page 35 of College Football's Great Dynasties: Notre Dame by Roland Lazenby, published in 1991), this seems to be a corruption; older sources, along with other recent sources, refer to it as "Flight 5" (an older example is page 127 of The Only Way to Fly: the Story of Western Airlines, America's Senior Air Carrier by Robert J. Serling, published in 1976). Transcontinental & Western Air's own timetables from this period have no "Flight 599" or any flight numbers with more than two digits, and its transcontinental flights all have one-digit numbers, as can be seen in Airline Timetable Images' scans of T&WA's February 1, 1931 and April 20, 1931 timetables. The latter timetable includes a "Flight No. 5" with the same route and schedule as the flight which crashed.
ucsb.edu
presidency.ucsb.edu
Hoover, Herbert, President of the United States, message to Mrs. Knute Rockne, 119 - "Message of Sympathy on the Death of Knute Rockne", April 1, 1931, Washington, D.C., cited on the web site of The American Presidency Project
Friedman, Herbert M.; Friedman, Ada Kera (31 March 2001). "The Legacy of the Rockne Crash". Aeroplane. UK. Archived from the original on 13 July 2011 – via University of Notre Dame Archives website "Reflections from the Dome".