Air safety regulators in the United States are investigating two potential safety problems affecting Boeing 767 jetliners.
Boeing says airlines were alerted about two weeks ago after cracks were found by an American operator in the engine mounts of two planes.
The company is likely to recommend that airlines increase the frequency of their inspections.
About 260 aeroplanes in the worldwide fleet of more than 900 767 jetliners could be affected, including five operated by Air New Zealand.
Air safety regulators are also analysing wingtip extensions designed to reduce drag, which they say may cause stress cracks in the planes' backbones.