One-Two-GO Airlines Flight 269 One-Two-GO Airlines Flight 269 One-Two-GO Airlines Flight 269 (OG269), a McDonnell Douglas MD-82, crashed into an embankment beside runway 27 at Phuket International Airport (HKT) bursting into flames upon impact on 16 September 2007, about 15:41 ICT during an attempted go-around after an aborted landing, killing 89 of the 130 persons on board. (One survivor died to burn injuries several days after the crash). OG269 was a scheduled domestic passenger flight from Bangkok to Phuket, Thailand. A two-year investigation by NTSB resulted in a report largely incorporated into the crash report published by the Aircraft Accident Investigation Committee of the
Square-free word first difference of the Thue–Morse sequence. That is, from the Thue–Morse sequence one forms a new sequence in which each term is the difference of two consecutive terms of the Thue–Morse sequence. The resulting square-free word is Another example found by John Leech is defined recursively over the alphabet {"a, b, c"}. Let formula_1 be any word starting with the letter "a". Define the words formula_2 recursively as follows: the word formula_3 is obtained from formula_4 by replacing each "a" in formula_4 with , each "b" with , and each "c" with . It is possible to check that the