Air Asia Indonesia Lost Contact from Surabaya to Singapore

[Ber Nooly]

Regarding that leaked ATC recording, she clears him with a squawk of 7005, but later it had 7001. Would this change enroute be normal or are we talking about a recording from a different day?

"Wagon Air eight five zero one clear to Singapore, mike six three five level two four zero initial, RAMPY one alpha departure squawk number seven zero zero five,” a female voice from the ATC was heard. - See more at: Leaked: Communication between AirAsia flight QZ8501 and Air Traffic Control | The New Paper