Director Ross Townshend was stood down from the Tatua board with immediate effect.
Oceania Aviation is restructuring its fixed-wing division as a result of covid-19 pressures.
The Forsyth Barr analysts note Infratil's only investment in a listed company now is its 51% stake in Trustpower.
Infratil is allowing investors to reinvest their dividends, even though it already has an embarrassment of riches and says it won't be returning capital to shareholders.