Martinair Flight 138 was a charter flight of Martinair from Surabaya to Jeddah with stopover in Colombo. On 4 December 1974, the Douglas DC-8 operating the flight crashed into a mountain shortly before landing, killing all 191 people aboard – 182 passengers, all of whom were Indonesian Hajj pilgrims, and nine crew members. The crash remains the deadliest in Sri Lankan aviation history and the third-deadliest involving a DC-8, after Arrow Air Flight 1285R and Nigeria Airways Flight 2120. At the time of the crash, it was the second-deadliest aviation accident in history, after the crash of Turkish Airlines Flight 981 which occurred earlier that same year.