QANTAS is not yet confirming that it was a dirty nappy that resulted in the Boeing 767 performing an unscheduled landing in Mount Isa on Sunday night.
Flight 825 from Darwin to Brisbane made an emergency landing in Mount Isa after passengers and crew complained of a strange smell in the cabin.
A commentator on the Aviation Herald website, "Frank Smith" claimed the fumes were a very smelly nappy "dumped in the forward toilet".
A Qantas spokeswoman said yesterday the claim was "unconfirmed".
"We have yet to confirm what caused the fumes," she said.
The plane was cleared by Qantas engineers to fly back to Brisbane on Monday afternoon.
The fact that Mount Isa Airport did not have stairs high enough to reach the door of the 767, resulting in passengers being evacuated by a cage on a forklift made the news all around Australia and New Zealand.