attempts, killing 10 of 15 on board. The aircraft was operating a Paris-Strasbourg-Prague passenger service. On February 13, 1947, a ČSA Douglas C-47A (registration OK-XDU) crashed shortly after takeoff from Ruzyne Airport while on a training flight, killing all three on board; improper maintenance was blamed, leading to a five-day crew strike. On December 21, 1948, ČSA Flight 584 (a Douglas C-47A, registration OK-WDN) struck a hillside near Pilos, Greece in bad weather, killing all 24 on board. Other reports state the aircraft was shot down after the pilot lit a flare or crashed into the hill while dropping weapons for communist insurgents. The aircraft was operating a passenger service from Czechoslovakia to Israel with stops at Rome and Athens. On February 27, 1950, a ČSA Douglas C-47A (registration OK-WDY) struck Praded Mountain en route to Prague from Ostrava, killing six of 25 on board. On January 12, 1954, a ČSA Douglas C-47A (registration OK-WDS) struck a chimney and power lines and crashed near Prague after nearly failing to take off, killing all 13 on board. On January 18, 1956, a ČSA Douglas C-47A (registration OK-WDZ) struck Mount Skapova after the aircraft was blown off course by strong winds, killing 22 of 26 on board. On November 24, 1956, a ČSA Ilyushin Il-12 (registration OK-DBP) crashed into a field near Egislau, Switzerland, killing all 23 on board. On January 2, 1961, a ČSA Avia 14 (registration OK-MCZ) crashed on climbout from Prague during a pilot training flight after failing to gain height on takeoff, killing all 10 on board. On March 28, 1961 ČSA Flight 511 (an Ilyushin Il-18V) crashed in Gräfenberg near Nürnberg during a Prague-Zurich service due to structural failure, killing all 52 on board. On July 12, 1961, ČSA Flight 511 (an Ilyushin Il-18V, registration OK-PAF) crashed near Anfa Airport due to possible crew error, killing all 72 on board. On October 10, 1962, ČSA Flight 306 (an Avia 14, registration OK-MCT) crashed near Slavkov while on approach to Brno, killing 13 of 42 on board. On September 5, 1967 ČSA Flight 523, an Ilyushin Il-18D (registration OK-WAI), crashed on climbout from Gander International Airport while on a Prague-Shannon-Gander-Havana passenger service, killing 37 of 69 on board; the cause was never determined. On October 11, 1968, a ČSA Avia 14-32A (registration OK-MCJ, named Svit Gottwaldov) crashed near Ptice shortly after takeoff from Prague, killing 11 of 40