Yeah I thought so.

He'll be fine. By the time he's got through customs he won't be that early. I'd recommend keeping the boarding pass stub from the previous flight to show AI check in staff just in case. Worse case scenario he might have to kill 45 mins or so in departures before they start check in but it's quite nice.

Is he aware he will only get 15 kg baggage allowance on the domestic leg. Even with the international connection.