Aircraft
The aircraft, a Vickers Viscount Type 793 with four Rolls-Royce Dart 510 turboprop engines, was built by Vickers-Armstrongs (Aircraft) Ltd and completed in 1958 with serial number 429.
A United Kingdom Certificate of Airworthiness was issued on 25 July 1958, valid for one year, and a Certificate of Validation for the same period was issued by the Civil Aviation Department of the Turkish Ministry of Communications. The aircraft was registered in the name of Turkish Airlines Incorporated.
The airframe had a total flight time of 548 hours and the engines had each run approximately 615 hours since manufacture. The Turkish authorities certified after examining the appropriate records and log books in Turkey that the maintenance had been properly carried out. Examination of the translated extracts from these documents showed no record of any defect, which might have affected the accident. It was noted that no inspections of the ILS equipment in the aircraft had been carried out.
At the time of the accident, the weight of the aircraft was below the permissible maximum for landing. It was not possible to check the trim but there was no reason to believe that it was not within the prescribed limits.
Read more about this topic: 1959 Turkish Airlines Gatwick Crash