THE national aviation watchdog has confirmed Regional Express has been cleared of all allegations relating to claims the airline has a poor safety culture.
Civil Aviation Safety Authority spokesman Peter Gibson said although the final report would not be released publicly, the audit of the airline's Wagga operations found no cause for concern.
Mr Gibson said CASA is satisfied it has examined the allegations thoroughly and determined Rex's maintenance systems are up to standard.
In a statement released on Tuesday afternoon, Rex said the audit report did not issue a single safety finding and did not find even any minor lapses that would warrant a safety observation.
Rex also said the audit examined the video provided by an anonymous source to a Sydney media outlet that allegedly showed "rust" on a propeller shaft.
The airline said CASA accepted the evidence that the surface discolouration visible in the video was simply dirt and very minor surface corrosion.
In the statement, Rex's deputy chairman John Sharp praised the safety authority for the way it had handled the matter.
"CASA should be highly commended for devoting considerable resources in ensuring that the audit report was published soon after the audit so that the public can be reassured quickly of the excellent safety standards of Rex," he said.
Mr Sharp has said previously the claims were made by a "disgruntled engineer" who had been taken to task for several instances of professional negligence and misconduct".