BSAA Star Tiger disappearance
Star Tiger (registration G-AHNP) was an Avro Tudor passenger aircraft owned and operated by British South American Airways (BSAA) which disappeared without a trace over the Atlantic Ocean while on a flight between Santa Maria in the Azores and Bermuda in the early morning of 30 January 1948. The loss of the aircraft, along with that of BSAA Avro Tudor Star Ariel in 1949, remains unsolved.
Source: Wikipedia — BSAA Star Tiger disappearance (CC BY-SA 4.0)