A second group of ACT State Emergency Service volunteers will be helping search for missing Malaysian Airlines Flight MH370.

The group of four will be heading to Western Australia on Tuesday to work as air search observers.

In a statement, the ACT Emergency Services Agency said the Australian Maritime Safety Authority requested the extra help on Monday.

This is the second group of volunteers from the ACT to help with the search for MH370, after a group of four volunteers left on Thursday April 9.

At the time, Police and Emergency Services Minister Simon Corbell said they would play an important role in the search for the missing Malaysian Airlines plane.