The propeller which fell off a Regional Express flight as it was approaching Sydney has been found in bushland southwest of the city.
A police helicopter on patrol spotted the Saab 340 propeller in bushland off The River Road at Revesby about midday on Tuesday.
Officers have established a crime scene and NSW Police are working with the Australian Transport Safety Bureau to "safely recover the item".
The propeller sheared off Friday's Rex flight from Albury to Sydney which was carrying 16 passengers and three crew.
The plane subsequently landed safely at Sydney Airport.