in the right engine due to maintenance errors, killing 53 of 81 on board; the accident remains the worst in Puerto Rico. 12 July 1949: Standard Air Lines Flight 897R (a C-46E, N79978) crashed at Chatsworth, California, due to pilot error, killing 35 of 48 on board. 19 July 1949: An Air Transport Associates C-46F (N5075N) crashed on takeoff from Boeing Field after the left engine lost power, probably due to use of low-octane fuel, killing two of 32 on board; one person on the ground also died. 2 August 1949: A Varig C-46D (PP-VBI) operating a flight from São Paulo-Congonhas Airport to Porto Alegre made an emergency landing on rough terrain near the location of Jaquirana, approximately 20 minutes before landing in Porto Alegre, following fire on the cargo hold. Of the 36 passengers and crew aboard, five died. 9 October 1949: Slick Airways Flight 11-8 (a C-46E, NC59485) crashed near Cheyenne, Wyoming due to loss of control caused by icing and severe turbulence, killing all three on board. 4 December 1949: A Civil Air Transport C-46 crashed in China, killing the five crew; the aircraft was carrying a cargo of fuel. 9 December 1949: A Civil Air Transport C-46D (XT-820) crashed near Lanzhou, killing all 38 on board. 10 December 1949: A Civil Air Transport C-46D (XT-814) crashed at Haikou, killing 17 of 40 on board. 1950s 27 May 1950: A Regina Cargo Airlines C-46F (N9406H) crashed on takeoff from Teterboro Airport due to overloading and engine problems, killing one of the pilots; the airline's AOC was suspended following the crash. 5 June 1950: A Westair Transport C-46F (N1248N) operating a flight from San Juan, PR to Wilmington, NC ditched into the Atlantic 300 miles east of Melbourne, Florida due to failure of both engines for reasons unknown. It sank in one of the deepest areas of the Atlantic and could not be recovered. Of the 65 passengers and crew aboard, 28 died. 23 July 1950: USAF C-46D 44-77577 lost control and crashed shortly after takeoff from Myrtle Beach AFB after the left aileron separated, killing all 39 on board. 8 January 1951: USAF C-46D 44-78505 crashed on landing at Chungju (K-41) Air Base, South Korea; the aircraft struck two other C-46Ds, 44-78270 and 44-78262. Two of three on board 478505 died. 14 February 1951: A LANSA C-46A (HK-333) crashed near Yalí, Colombia, killing both pilots. 25 February