Analysis of information sources in references of the Wikipedia article "Birgenair" in Turkish language version.
It had not been flown for 20 days before the accident...Investigators believe that the engine [covers] and pitot covers were not installed before or after the engine ground test.
It had not been flown for 20 days before the accident...Investigators believe that the engine [covers] and pitot covers were not installed before or after the engine ground test.
