He returned to court on Monday morning before Deputy Chief Justice Sir Gibbs Salika, who set the matter for a possible 4-day trial from May 1.
Public Prosecutor Pondros Kaluwin informed the court that the state will proceed the trial on the charge of murder.
Parker was initially charged for wilful murder in June 2015.
The 44-year-old from Minj, Jiwaka Province, was arrested and charged with the wilful murder of his chief aircraft engineer, 54-year-old Lapan Nason, from New Ireland Province, on June 8, 2015.
