The Saudi Arabian Airlines (Saudia) Boeing 747-168B, registration HZ-AIH,[REF] was flying the first leg of a scheduled international Delhi-Dhahran-Jeddah passenger service as Flight SVA763 with 312 occupants on board;[REF] the Kazakhstan Airlines Ilyushin Il-76TD,[REF] registration UN-76435, was on a charter service from Chimkent to Delhi as KZA1907 [REF].
When the controller called KZA1907 again, he received no reply.