An Air Niugini ATR 42-300 freighter aircraft was badly damaged after it apparently rejected a take-off at Madang airport in Papua New Guinea on 19 October.
The flag carrier says the aircraft veered off the runway as it was "taxing to its final preparation for take off". Thereafter, there was a fire, it adds.
Media reports in Papua New Guinea, however, quoted the country's ministry of civil aviation saying that the turboprop had rejected take off after an engine fire. The aircraft overran the end of the runway and landed in the waters of a creek nearby. The ministry could not be contacted for further comment.
The aircraft, registered P2-PXY, was operating a freighter service from Madang to Tabubi when the incident happened.
Air Niugini says that all three crew on board survived.
It adds that the airline is supporting the accident investigation commission, and that it is "not proper" for it to comment on the cause of the crash as the investigation is ongoing.
Pictures that have surfaced online show the turboprop half submerged in a creek with its right engine and wing area charred.
Flightglobal Pro data shows that the turboprop entered into service in 1988 and is fitted with Pratt & Whitney PW121 engines.