A US law firm has launched the largest aviation compensation claim in Australia over the 2008 Qantas flight that was forced to land in WA, the ABC reports.
The Airbus A330 had to make an emergency landing at Learmonth in the middle of the night after it suffered two sudden drops in altitude during its flight from Singapore to Perth.
More than 100 passengers and crew were injured.
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But the head of the firm says all on board the flight, including the pilots, are eligible for compensation.
On October 7, 2008, QF72 from Singapore to Perth was travelling at 11,000 metres when the autopilot disengaged and the plane plunged 200 metres in 20 seconds.
Three minutes later it plunged a further 120 metres, this time over 16 seconds.
Nine crew and 106 passengers were injured.
After a forced landing at Learmonth, 14 people were airlifted to Perth for treatment while another 39 people were taken to hospital.
The Australian Transport Safety Bureau's investigation found fault with one of the plane's computer programs.
Mr Wisner's law firm is representing 70 people.

