Air New Zealand has told staff it plans to slash 300 engineering and maintenance jobs as part of downsizing, union E tū says.
Workers were told of the plans on Friday, the union says.
In response, union members are calling for the company to bring back work sent offshore to Singapore in 2015 to protect jobs in New Zealand.
The news follows plans to cut about 300 pilot roles, with the 900 remaining taking a 30 per cent pay cut for the next nine months.
E tū delegate and licensed aircraft engineer in Christchurch Peter Lees said the company needed to do everything possible to save the high-skilled jobs.