Cut price airline Tiger Airways is being investigated by the air safety watchdog over maintenance and flying training issues.
Details of the Civil Aviation and Safety Authority investigation emerged today as the airline was forced to cancel several flights between Eastern State cities, wrecking the Easter travel plans for several hundred passengers.
Tiger said the cancellation of services was not related to the CASA investigation
Perth services are continuing as scheduled today.
It emerged today that last month CASA issued a "show cause" notice which asks the airline to show why CASA shouldn't act to vary, suspend or cancel the operator's civil aviation authorisations.
The notice was issued over a series of concerns relate to safety and maintenance according to insiders but they more relate to paperwork and are not considered serious.
"Where there is not a serious and imminent risk to safety" CASA issues "show cause" notices the authority said in a statement.
"Show cause notices set out the facts and circumstances of the matter ..and provides the operator with an opportunity to explain their own view of those facts and circumstances."
_The West Australian _understands that Tiger, which is part owned by Singapore Airlines, has "responded robustly".
A Tiger Airways spokesperson said that the airline "has responded promptly and in full to CASA's inquiry.
"Safety underpins Tiger's operations at all times and Tiger continues to operate normally with CASA's approval," a spokesperson said.
Tiger operates three daily flights to Perth from Melbourne.The last time CASA issue a "show cause" notice to a major airline was Ansett in 2001 over safety breaches with its Boeing 767s.
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