An investigation is underway after a propeller broke free and struck the fuselage of a plane flying from Great Barrier Island to Auckland.
Eleven people were on board the flight on Sunday.
Chief Inspector with the Transport Accident Investigation Commission, Tim Burfoot, says the three engined Islander aircraft turned back and landed safely.
He says it is too soon to say how much danger the plane's passengers were in as it depends on the nature of the damage.
An accident investigator has been on Great Barrier all day inspecting the aircraft and looking for the propeller.
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