The air safety regulator has raised concerns about safety standards at budget airline Tiger Airways.

The Civil Aviation and Safety Authority (CASA) issued the budget airline with a show cause notice last month in light of concerns about pilot training and maintenance procedures.

It is the first time CASA has taken such action against a major Australian airline since it threatened to stop Ansett operating in 2001.

Tiger spokeswoman Vanessa Regan has told ABC Local Radio there is no safety risk.

"Where there is a not a serious and imminent risk to safety, one action that CASA can take is to issue a show cause notice," she said.

"Basically what they've done is they've asked for a few corrective measures - those were implemented.

"There is no cause for concern. CASA has taken no action.

"We continue to operate and we want to reassure our customers that there is no risk to safety and we continue as normal."

CASA is reviewing Tiger's response.

Captain Richard Woodward from the Australian and International Pilots Association says there are concerns about standards slipping across the industry.

"Pilot training is quite expensive and like all these things, when you're cutting costs or building a low-cost carrier, you look at every cost," he said.

"These days, training is pitched at the minimum necessary to meet the regulatory compliance, not necessarily at the level where a pilot would feel comfortable or that will develop their skills."