Tiger Airways breached safety rules by failing to report a wing-flap problem on an Airbus A320s, a problem that re-occurred eight months later, forcing an unscheduled landing with 125 passengers on board.
In the second incident, a wing began flexing in a metre arc at 35,000 feet as crew tried to deal with the problem.
An Australian Transport Safety Bureau investigation found flawed manufacturing and intermittent computer glitches set the conditions for uncontrolled flapping of a wing aileron, or flap
Jet's flapping wing forced down passenger flight
Seems like this may be a reason as to why CASA won't approve any more a/c for Tiger in Australia at the moment, as mentioned on another thread somewhere.