23 September 1961
| Struck hill on final approach|
Karanlıktepe, Ankara Province, Turkey
KLM Flight 823, 1961 Derby Aviation c, Viasa Flight 897, 1961 Cincinnati Zantop D, Aerolíneas Argentinas Flight 644
Turkish Airlines Flight 835 Wikipedia
Turkish Airlines Flight 835 was a scheduled domestic passenger flight from Adana Şakirpaşa Airport, Adana to Esenboğa International Airport, Ankara, Turkey. On 23 September 1961 at 20:02 EET (18:02 UTC), the aircraft operating the flight, a brand-new Fokker F27 Friendship 100 struck the Karanlıktepe hill in Ankara Province on final approach some 18 kilometres (11 mi) off the runway centerline.
The aircraft was carrying four crewmembers and 25 passengers of which 24 passengers and all the four crewmembers were killed in the accident.
The probable cause of the accident was that the aircraft was not in the normal flying pattern and was well below its designated altitude.