Chopper crashed on test flight in Istanbul: Military

By Sarp Ozer and Ahmet Sertan Usul</p> <p>ANKARA (AA) – A helicopter that crashed in Istanbul on Monday was on test flight, according to Turkish military sources.</p> <p>At least four soldiers were martyred in the crash during an emergency landing in Istanbul near a residential area in Cekmekoy district.</p> <p>Military officials said after a crash Nov. 26 in Istanbul, some 126 UH-1-type crafts were allowed to fly after successfully completing engine tests.</p> <p>