Original sentence: On entering Yugoslav sirspace from Austria, flight 476 established radio contact with the Zagreb ACC upper-sector controller Gradimir Tasić at 10:04:12 UTC, informing him that they were at flight level 330 and expected to reach the Zagreb VOR at 10:14
Edited sentence: On entering Yugoslav airspace from Austria, flight 476 established radio contact with the Zagreb ACC upper-sector controller Gradimir Tasić at 10:04:12 UTC, informing him that they were at flight level 330 and expected to reach the Zagreb VOR at 10:14