Air safety experts are set to reveal their initial findings into the cause of a fatal plane crash into a Melbourne shopping centre.
Australian Transport Safety Bureau investigators will on Wednesday discuss their preliminary findings at Essendon airport following the light plane crash which killed all five onboard on Tuesday.
They will also outline the next steps their investigation.
Victorian Premier Daniel Andrews told reporters on Tuesday he would wait on the outcome of investigations into the crash before commenting on Essendon's future.
It's been reported pilot Max Quartermain was subject to an ongoing investigation by the ATSB in relation to a "near collision" with another plane in Mount Hotham in September 2015.
The ATSB website lists information about an a three times delayed investigation into a near-miss in Mount Hotham in September 2015, but does not name Mr Quartermain as the responsible pilot.
Fellow pilot and aero engineer Bob MacGillivray said he hadn't heard a bad word about Mr Quartermain, who had a long-established and solid reputation.
Mr Quartermain and US citizens Greg Reynolds De Haven, Russell Munsch, Glenn Garland were among those who died in the fiery crash into Essendon DFO on Tuesday. The fourth US citizen has been identified by US media as John Washburn.
American media reports a Texas law firm has confirmed Mr Munsch was a founding partner of Munsch Hardt and was involved in some of the most prominent bankruptcy cases in the US, including the Enron proceedings.
Munsch Hardt said in a statement that he had retired but was "one of the best of all time".
On Facebook, the sister of Mr De Haven, Denelle Wicht, said her "handsome athletic big brother" had died in the crash while on his "one in a lifetime" trip to Australia.
The plane was heading to King Island to play golf when the the Beechcraft Super King Air twin-engine plane appeared to suffer catastrophic engine failure moments after take-off.
The tragedy is Victoria's worst aviation accident in 30 years.
ATSB investigators examined the crash site and wreckage on Tuesday.
They are expected to further examine the sites in addition to the plane's maintenance records, as well as pilot training, meteorological conditions and recorded radio and radar data.
They will also interview witnesses.
The fiery crash has reignited speculation over whether the airport, surrounded by homes, a retail outlet and freeway, should remain open.
Calls to close it started after a plane crashed into a house killing six members of one family in 1978.
Essendon DFO is being assessed for structural flaws and will not reopen until Thursday at the earliest.
Crash witnesses have been urged to contact the ATSB on 1800 020 616.
