The carrier was already under CASA's spotlight at that stage because of concerns about maintenance control as well as systemic problems relating to pilot training and proficiency.
The maintenance issues were related to the carrier's oversights from Singapore, rather than the standard of maintenance itself, and Tiger has since moved to address them by employing key personnel locally. It is believed these issues were not a factor in Friday's decision to ground the airline.
Concerns about pilot proficiency lingered, however, and CASA resolved the show-cause by putting a number of conditions on the airline's air operator's certificate. These include a requirement that the airline's check and training captains requalify, and subsequent additional simulator training for line pilots, as well as changes to fatigue management.
It was Tiger's response to the requirements and an incident last Thursday at Victoria's Avalon airport, near Geelong, that pushed the CASA concerns past the brink.
Endangered Tiger Airways goes to ground | The Australian