1929 PARK CITY, UTAH. On March 11 1929 a Boeing Air Transport Company Boeing 40B en route from San Francisco to Chicago crashed in a snowstorm near Park City, Utah. This cover from San Francisco to England has been quite badly burned and has been resealed with brown tape at the top. A 4 line cachet ‘AIR MAIL / DAMAGED IN PLANE CRASH / AT PARK CITY, UT. 3-11-29 / D.F.DUTTON. P. O. INSP.’ Has been applied to the cover.