By RNZ
The union for airline cabin crew is offering its support to Air New Zealand staff involved in an incident on board a long distance flight yesterday.
A man who had to be handcuffed in-flight because of alleged bad behaviour, was taken into police custody when the flight landed.
Savage from Et Tu union said crew and airlines are telling the union that there is an increasing number of unruly passengers.
"We don't have the data yet to look at how many serious incidents are occurring, but we're certainly concerned that there does appear to be a pattern of people taking out their frustrations under the influence of alcohol, especially on cabin crew.